- 14 May, 2019 40 commits
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Coly Li authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit 596b5a5d ] Currently sysfs_strtoul_clamp() is defined as, 82 #define sysfs_strtoul_clamp(file, var, min, max) \ 83 do { \ 84 if (attr == &sysfs_ ## file) \ 85 return strtoul_safe_clamp(buf, var, min, max) \ 86 ?: (ssize_t) size; \ 87 } while (0) The problem is, if bit width of var is less then unsigned long, min and max may not protect var from integer overflow, because overflow happens in strtoul_safe_clamp() before checking min and max. To fix such overflow in sysfs_strtoul_clamp(), to make min and max take effect, this patch adds an unsigned long variable, and uses it to macro strtoul_safe_clamp() to convert an unsigned long value in range defined by [min, max]. Then assign this value to var. By this method, if bit width of var is less than unsigned long, integer overflow won't happen before min and max are checking. Now sysfs_strtoul_clamp() can properly handle smaller data type like unsigned int, of cause min and max should be defined in range of unsigned int too. Signed-off-by:
Coly Li <colyli@suse.de> Signed-off-by:
Jens Axboe <axboe@kernel.dk> Signed-off-by:
Sasha Levin <sashal@kernel.org> Signed-off-by:
Kleber Sacilotto de Souza <kleber.souza@canonical.com> Signed-off-by:
Stefan Bader <stefan.bader@canonical.com>
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Coly Li authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit 8c27a395 ] People may set sequential_cutoff of a cached device via sysfs file, but current code does not check input value overflow. E.g. if value 4294967295 (UINT_MAX) is written to file sequential_cutoff, its value is 4GB, but if 4294967296 (UINT_MAX + 1) is written into, its value will be 0. This is an unexpected behavior. This patch replaces d_strtoi_h() by sysfs_strtoul_clamp() to convert input string to unsigned integer value, and limit its range in [0, UINT_MAX]. Then the input overflow can be fixed. Signed-off-by:
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Coly Li authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit a91fbda4 ] Cache set sysfs entry io_error_halflife is used to set c->error_decay. c->error_decay is in type unsigned int, and it is converted by strtoul_or_return(), therefore overflow to c->error_decay is possible for a large input value. This patch fixes the overflow by using strtoul_safe_clamp() to convert input string to an unsigned long value in range [0, UINT_MAX], then divides by 88 and set it to c->error_decay. Signed-off-by:
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Ranjani Sridharan authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit d9c0b2af ] BE dai links only have internal PCM's and their substream ops may not be set. Suspending these PCM's will result in their ops->trigger() being invoked and cause a kernel oops. So skip suspending PCM's if their ops are NULL. [ NOTE: this change is required now for following the recent PCM core change to get rid of snd_pcm_suspend() call. Since DPCM BE takes the runtime carried from FE while keeping NULL ops, it can hit this bug. See details at: https://github.com/thesofproject/linux/pull/582 -- tiwai ] Signed-off-by:
Ranjani Sridharan <ranjani.sridharan@linux.intel.com> Signed-off-by:
Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by:
Takashi Iwai <tiwai@suse.de> Signed-off-by:
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Nathan Chancellor authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit de9c0d49 ] While building arm32 allyesconfig, I ran into the following errors: arch/arm/lib/xor-neon.c:17:2: error: You should compile this file with '-mfloat-abi=softfp -mfpu=neon' In file included from lib/raid6/neon1.c:27: /home/nathan/cbl/prebuilt/lib/clang/8.0.0/include/arm_neon.h:28:2: error: "NEON support not enabled" Building V=1 showed NEON_FLAGS getting passed along to Clang but __ARM_NEON__ was not getting defined. Ultimately, it boils down to Clang only defining __ARM_NEON__ when targeting armv7, rather than armv6k, which is the '-march' value for allyesconfig. >From lib/Basic/Targets/ARM.cpp in the Clang source: // This only gets set when Neon instructions are actually available, unlike // the VFP define, hence the soft float and arch check. This is subtly // different from gcc, we follow the intent which was that it should be set // when Neon instructions are actually available. if ((FPU & NeonFPU) && !SoftFloat && ArchVersion >= 7) { Builder.defineMacro("__ARM_NEON", "1"); Builder.defineMacro("__ARM_NEON__"); // current AArch32 NEON implementations do not support double-precision // floating-point even when it is present in VFP. Builder.defineMacro("__ARM_NEON_FP", "0x" + Twine::utohexstr(HW_FP & ~HW_FP_DP)); } Ard Biesheuvel recommended explicitly adding '-march=armv7-a' at the beginning of the NEON_FLAGS definitions so that __ARM_NEON__ always gets definined by Clang. This doesn't functionally change anything because that code will only run where NEON is supported, which is implicitly armv7. Link: https://github.com/ClangBuiltLinux/linux/issues/287Suggested-by:
Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by:
Nathan Chancellor <natechancellor@gmail.com> Acked-by:
Nicolas Pitre <nico@linaro.org> Reviewed-by:
Nick Desaulniers <ndesaulniers@google.com> Reviewed-by:
Stefan Agner <stefan@agner.ch> Signed-off-by:
Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by:
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Andrea Righi authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit 02106f88 ] Since kprobe breakpoing handler is using bsearch(), probing on this routine can cause recursive breakpoint problem. int3 ->do_int3() ->ftrace_int3_handler() ->ftrace_location() ->ftrace_location_range() ->bsearch() -> int3 Prohibit probing on bsearch(). Signed-off-by:
Andrea Righi <righi.andrea@gmail.com> Acked-by:
Masami Hiramatsu <mhiramat@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/154998813406.31052.8791425358974650922.stgit@devboxSigned-off-by:
Ingo Molnar <mingo@kernel.org> Signed-off-by:
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Michal Kazior authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit 5ddb0869 ] I've stumbled upon a kernel crash and the logs pointed me towards the lp5562 driver: > <4>[306013.841294] lp5562 0-0030: Direct firmware load for lp5562 failed with error -2 > <4>[306013.894990] lp5562 0-0030: Falling back to user helper > ... > <3>[306073.924886] lp5562 0-0030: firmware request failed > <1>[306073.939456] Unable to handle kernel NULL pointer dereference at virtual address 00000000 > <4>[306074.251011] PC is at _raw_spin_lock+0x1c/0x58 > <4>[306074.255539] LR is at release_firmware+0x6c/0x138 > ... After taking a look I noticed firmware_release() could be called with either NULL or a dangling pointer. Fixes: 10c06d17 ("leds-lp55xx: support firmware interface") Signed-off-by:
Michal Kazior <michal@plume.com> Signed-off-by:
Jacek Anaszewski <jacek.anaszewski@gmail.com> Signed-off-by:
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Ezequiel Garcia authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit 8d20dcef ] Fix the assigned type of mem2mem buffer handling API. Namely, these functions: v4l2_m2m_next_buf v4l2_m2m_last_buf v4l2_m2m_buf_remove v4l2_m2m_next_src_buf v4l2_m2m_next_dst_buf v4l2_m2m_last_src_buf v4l2_m2m_last_dst_buf v4l2_m2m_src_buf_remove v4l2_m2m_dst_buf_remove return a struct vb2_v4l2_buffer, and not a struct vb2_buffer. Fixing this is necessary to fix the mem2mem buffer handling API, changing the return to the correct struct vb2_v4l2_buffer instead of a void pointer. Signed-off-by:
Ezequiel Garcia <ezequiel@collabora.com> Signed-off-by:
Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by:
Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Signed-off-by:
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Ezequiel Garcia authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit 30fa627b ] Fix the assigned type of mem2mem buffer handling API. Namely, these functions: v4l2_m2m_next_buf v4l2_m2m_last_buf v4l2_m2m_buf_remove v4l2_m2m_next_src_buf v4l2_m2m_next_dst_buf v4l2_m2m_last_src_buf v4l2_m2m_last_dst_buf v4l2_m2m_src_buf_remove v4l2_m2m_dst_buf_remove return a struct vb2_v4l2_buffer, and not a struct vb2_buffer. Fixing this is necessary to fix the mem2mem buffer handling API, changing the return to the correct struct vb2_v4l2_buffer instead of a void pointer. Signed-off-by:
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Ezequiel Garcia authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit 4a88f898 ] Fix the assigned type of mem2mem buffer handling API. Namely, these functions: v4l2_m2m_next_buf v4l2_m2m_last_buf v4l2_m2m_buf_remove v4l2_m2m_next_src_buf v4l2_m2m_next_dst_buf v4l2_m2m_last_src_buf v4l2_m2m_last_dst_buf v4l2_m2m_src_buf_remove v4l2_m2m_dst_buf_remove return a struct vb2_v4l2_buffer, and not a struct vb2_buffer. Fixing this is necessary to fix the mem2mem buffer handling API, changing the return to the correct struct vb2_v4l2_buffer instead of a void pointer. Signed-off-by:
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Ezequiel Garcia authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit 43c14519 ] Fix the assigned type of mem2mem buffer handling API. Namely, these functions: v4l2_m2m_next_buf v4l2_m2m_last_buf v4l2_m2m_buf_remove v4l2_m2m_next_src_buf v4l2_m2m_next_dst_buf v4l2_m2m_last_src_buf v4l2_m2m_last_dst_buf v4l2_m2m_src_buf_remove v4l2_m2m_dst_buf_remove return a struct vb2_v4l2_buffer, and not a struct vb2_buffer. Fixing this is necessary to fix the mem2mem buffer handling API, changing the return to the correct struct vb2_v4l2_buffer instead of a void pointer. Signed-off-by:
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Wen Yang authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit 8fa857da ] The of_find_device_by_node() takes a reference to the underlying device structure, we should release that reference. Detected by coccinelle with the following warnings: ./sound/soc/fsl/imx-sgtl5000.c:169:1-7: ERROR: missing put_device; call of_find_device_by_node on line 105, but without a corresponding object release within this function. ./sound/soc/fsl/imx-sgtl5000.c:177:1-7: ERROR: missing put_device; call of_find_device_by_node on line 105, but without a corresponding object release within this function. Signed-off-by:
Wen Yang <yellowriver2010@hotmail.com> Cc: Timur Tabi <timur@kernel.org> Cc: Nicolin Chen <nicoleotsuka@gmail.com> Cc: Xiubo Li <Xiubo.Lee@gmail.com> Cc: Fabio Estevam <festevam@gmail.com> Cc: Liam Girdwood <lgirdwood@gmail.com> Cc: Mark Brown <broonie@kernel.org> Cc: Jaroslav Kysela <perex@perex.cz> Cc: Takashi Iwai <tiwai@suse.com> Cc: Shawn Guo <shawnguo@kernel.org> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: Pengutronix Kernel Team <kernel@pengutronix.de> Cc: NXP Linux Team <linux-imx@nxp.com> Cc: alsa-devel@alsa-project.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by:
Mark Brown <broonie@kernel.org> Signed-off-by:
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Thomas Richter authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit 03d30971 ] Commit 489338a7 ("perf tests evsel-tp-sched: Fix bitwise operator") causes test case 14 "Parse sched tracepoints fields" to fail on s390. This test succeeds on x86. In fact this test now fails on all architectures with type char treated as type unsigned char. The root cause is the signed-ness of character arrays in the tracepoints sched_switch for structure members prev_comm and next_comm. On s390 the output of: [root@m35lp76 perf]# cat /sys/kernel/debug/tracing/events/sched/sched_switch/format name: sched_switch ID: 287 format: field:unsigned short common_type; offset:0; size:2; signed:0; ... field:char prev_comm[16]; offset:8; size:16; signed:0; ... field:char next_comm[16]; offset:40; size:16; signed:0; reveals the character arrays prev_comm and next_comm are per default unsigned char and have values in the range of 0..255. On x86 both fields are signed as this output shows: [root@f29]# cat /sys/kernel/debug/tracing/events/sched/sched_switch/format name: sched_switch ID: 287 format: field:unsigned short common_type; offset:0; size:2; signed:0; ... field:char prev_comm[16]; offset:8; size:16; signed:1; ... field:char next_comm[16]; offset:40; size:16; signed:1; and the character arrays prev_comm and next_comm are per default signed char and have values in the range of -1..127. The implementation of type char is architecture specific. Since the character arrays in both tracepoints sched_switch and sched_wakeup should contain ascii characters, simply omit the check for signedness in the test case. Output before: [root@m35lp76 perf]# ./perf test -F 14 14: Parse sched tracepoints fields : --- start --- sched:sched_switch: "prev_comm" signedness(0) is wrong, should be 1 sched:sched_switch: "next_comm" signedness(0) is wrong, should be 1 sched:sched_wakeup: "comm" signedness(0) is wrong, should be 1 ---- end ---- 14: Parse sched tracepoints fields : FAILED! [root@m35lp76 perf]# Output after: [root@m35lp76 perf]# ./perf test -Fv 14 14: Parse sched tracepoints fields : --- start --- ---- end ---- Parse sched tracepoints fields: Ok [root@m35lp76 perf]# Fixes: 489338a7 ("perf tests evsel-tp-sched: Fix bitwise operator") Signed-off-by:
Thomas Richter <tmricht@linux.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Link: http://lkml.kernel.org/r/20190219153639.31267-1-tmricht@linux.ibm.comSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by:
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Jason Yan authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit bcf3b67d ] when create DMA pool for cmd frames failed, we should return -ENOMEM, instead of 0. In some case in: megasas_init_adapter_fusion() -->megasas_alloc_cmds() -->megasas_create_frame_pool create DMA pool failed, --> megasas_free_cmds() [1] -->megasas_alloc_cmds_fusion() failed, then goto fail_alloc_cmds. -->megasas_free_cmds() [2] we will call megasas_free_cmds twice, [1] will kfree cmd_list, [2] will use cmd_list.it will cause a problem: Unable to handle kernel NULL pointer dereference at virtual address 00000000 pgd = ffffffc000f70000 [00000000] *pgd=0000001fbf893003, *pud=0000001fbf893003, *pmd=0000001fbf894003, *pte=006000006d000707 Internal error: Oops: 96000005 [#1] SMP Modules linked in: CPU: 18 PID: 1 Comm: swapper/0 Not tainted task: ffffffdfb9290000 ti: ffffffdfb923c000 task.ti: ffffffdfb923c000 PC is at megasas_free_cmds+0x30/0x70 LR is at megasas_free_cmds+0x24/0x70 ... Call trace: [<ffffffc0005b779c>] megasas_free_cmds+0x30/0x70 [<ffffffc0005bca74>] megasas_init_adapter_fusion+0x2f4/0x4d8 [<ffffffc0005b926c>] megasas_init_fw+0x2dc/0x760 [<ffffffc0005b9ab0>] megasas_probe_one+0x3c0/0xcd8 [<ffffffc0004a5abc>] local_pci_probe+0x4c/0xb4 [<ffffffc0004a5c40>] pci_device_probe+0x11c/0x14c [<ffffffc00053a5e4>] driver_probe_device+0x1ec/0x430 [<ffffffc00053a92c>] __driver_attach+0xa8/0xb0 [<ffffffc000538178>] bus_for_each_dev+0x74/0xc8 [<ffffffc000539e88>] driver_attach+0x28/0x34 [<ffffffc000539a18>] bus_add_driver+0x16c/0x248 [<ffffffc00053b234>] driver_register+0x6c/0x138 [<ffffffc0004a5350>] __pci_register_driver+0x5c/0x6c [<ffffffc000ce3868>] megasas_init+0xc0/0x1a8 [<ffffffc000082a58>] do_one_initcall+0xe8/0x1ec [<ffffffc000ca7be8>] kernel_init_freeable+0x1c8/0x284 [<ffffffc0008d90b8>] kernel_init+0x1c/0xe4 Signed-off-by:
Jason Yan <yanaijie@huawei.com> Acked-by:
Sumit Saxena <sumit.saxena@broadcom.com> Signed-off-by:
Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by:
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Håkon Bugge authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit 2612d723 ] Using CX-3 virtual functions, either from a bare-metal machine or pass-through from a VM, MAD packets are proxied through the PF driver. Since the VF drivers have separate name spaces for MAD Transaction Ids (TIDs), the PF driver has to re-map the TIDs and keep the book keeping in a cache. Following the RDMA Connection Manager (CM) protocol, it is clear when an entry has to evicted form the cache. But life is not perfect, remote peers may die or be rebooted. Hence, it's a timeout to wipe out a cache entry, when the PF driver assumes the remote peer has gone. During workloads where a high number of QPs are destroyed concurrently, excessive amount of CM DREQ retries has been observed The problem can be demonstrated in a bare-metal environment, where two nodes have instantiated 8 VFs each. This using dual ported HCAs, so we have 16 vPorts per physical server. 64 processes are associated with each vPort and creates and destroys one QP for each of the remote 64 processes. That is, 1024 QPs per vPort, all in all 16K QPs. The QPs are created/destroyed using the CM. When tearing down these 16K QPs, excessive CM DREQ retries (and duplicates) are observed. With some cat/paste/awk wizardry on the infiniband_cm sysfs, we observe as sum of the 16 vPorts on one of the nodes: cm_rx_duplicates: dreq 2102 cm_rx_msgs: drep 1989 dreq 6195 rep 3968 req 4224 rtu 4224 cm_tx_msgs: drep 4093 dreq 27568 rep 4224 req 3968 rtu 3968 cm_tx_retries: dreq 23469 Note that the active/passive side is equally distributed between the two nodes. Enabling pr_debug in cm.c gives tons of: [171778.814239] <mlx4_ib> mlx4_ib_multiplex_cm_handler: id{slave: 1,sl_cm_id: 0xd393089f} is NULL! By increasing the CM_CLEANUP_CACHE_TIMEOUT from 5 to 30 seconds, the tear-down phase of the application is reduced from approximately 90 to 50 seconds. Retries/duplicates are also significantly reduced: cm_rx_duplicates: dreq 2460 [] cm_tx_retries: dreq 3010 req 47 Increasing the timeout further didn't help, as these duplicates and retries stems from a too short CMA timeout, which was 20 (~4 seconds) on the systems. By increasing the CMA timeout to 22 (~17 seconds), the numbers fell down to about 10 for both of them. Adjustment of the CMA timeout is not part of this commit. Signed-off-by:
Håkon Bugge <haakon.bugge@oracle.com> Acked-by:
Jack Morgenstein <jackm@dev.mellanox.co.il> Signed-off-by:
Jason Gunthorpe <jgg@mellanox.com> Signed-off-by:
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Florian Fainelli authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit 135e7245 ] Provide precision hints to snprintf() since we know the destination buffer size of the RX/TX ring names are IFNAMSIZ + 5 - 1. This fixes the following warnings: drivers/net/ethernet/intel/e1000e/netdev.c: In function 'e1000_request_msix': drivers/net/ethernet/intel/e1000e/netdev.c:2109:13: warning: 'snprintf' output may be truncated before the last format character [-Wformat-truncation=] "%s-rx-0", netdev->name); ^ drivers/net/ethernet/intel/e1000e/netdev.c:2107:3: note: 'snprintf' output between 6 and 21 bytes into a destination of size 20 snprintf(adapter->rx_ring->name, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ sizeof(adapter->rx_ring->name) - 1, ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ "%s-rx-0", netdev->name); ~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/ethernet/intel/e1000e/netdev.c:2125:13: warning: 'snprintf' output may be truncated before the last format character [-Wformat-truncation=] "%s-tx-0", netdev->name); ^ drivers/net/ethernet/intel/e1000e/netdev.c:2123:3: note: 'snprintf' output between 6 and 21 bytes into a destination of size 20 snprintf(adapter->tx_ring->name, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ sizeof(adapter->tx_ring->name) - 1, ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ "%s-tx-0", netdev->name); ~~~~~~~~~~~~~~~~~~~~~~~~ Signed-off-by:
Florian Fainelli <f.fainelli@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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Aaro Koskinen authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit a6327b5e ] When running OMAP1 kernel on QEMU, MMC access is annoyingly noisy: MMC: CTO of 0xff and 0xfe cannot be used! MMC: CTO of 0xff and 0xfe cannot be used! MMC: CTO of 0xff and 0xfe cannot be used! [ad inf.] Emulator warnings appear to be valid. The TI document SPRU680 [1] ("OMAP5910 Dual-Core Processor MultiMedia Card/Secure Data Memory Card (MMC/SD) Reference Guide") page 36 states that the maximum timeout is 253 cycles and "0xff and 0xfe cannot be used". Fix by using 0xfd as the maximum timeout. Tested using QEMU 2.5 (Siemens SX1 machine, OMAP310), and also checked on real hardware using Palm TE (OMAP310), Nokia 770 (OMAP1710) and Nokia N810 (OMAP2420) that MMC works as before. [1] http://www.ti.com/lit/ug/spru680/spru680.pdf Fixes: 730c9b7e ("[MMC] Add OMAP MMC host driver") Signed-off-by:
Aaro Koskinen <aaro.koskinen@iki.fi> Signed-off-by:
Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by:
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Sebastian Andrzej Siewior authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit 74ffe79a ] Mostly unwind is done with irqs enabled however SLUB may call it with irqs disabled while creating a new SLUB cache. I had system freeze while loading a module which called kmem_cache_create() on init. That means SLUB's __slab_alloc() disabled interrupts and then ->new_slab_objects() ->new_slab() ->setup_object() ->setup_object_debug() ->init_tracking() ->set_track() ->save_stack_trace() ->save_stack_trace_tsk() ->walk_stackframe() ->unwind_frame() ->unwind_find_idx() =>spin_lock_irqsave(&unwind_lock); Signed-off-by:
Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by:
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Sai Prakash Ranjan authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit 5666dfd1 ] SDM845 has ETMv4.2 and can use the existing etm4x driver. But the current etm driver checks only for ETMv4.0 and errors out for other etm4x versions. This patch adds this missing support to enable SoC's with ETMv4x to use same driver by checking only the ETM architecture major version number. Without this change, we get below error during etm probe: / # dmesg | grep etm [ 6.660093] coresight-etm4x: probe of 7040000.etm failed with error -22 [ 6.666902] coresight-etm4x: probe of 7140000.etm failed with error -22 [ 6.673708] coresight-etm4x: probe of 7240000.etm failed with error -22 [ 6.680511] coresight-etm4x: probe of 7340000.etm failed with error -22 [ 6.687313] coresight-etm4x: probe of 7440000.etm failed with error -22 [ 6.694113] coresight-etm4x: probe of 7540000.etm failed with error -22 [ 6.700914] coresight-etm4x: probe of 7640000.etm failed with error -22 [ 6.707717] coresight-etm4x: probe of 7740000.etm failed with error -22 With this change, etm probe is successful: / # dmesg | grep etm [ 6.659198] coresight-etm4x 7040000.etm: CPU0: ETM v4.2 initialized [ 6.665848] coresight-etm4x 7140000.etm: CPU1: ETM v4.2 initialized [ 6.672493] coresight-etm4x 7240000.etm: CPU2: ETM v4.2 initialized [ 6.679129] coresight-etm4x 7340000.etm: CPU3: ETM v4.2 initialized [ 6.685770] coresight-etm4x 7440000.etm: CPU4: ETM v4.2 initialized [ 6.692403] coresight-etm4x 7540000.etm: CPU5: ETM v4.2 initialized [ 6.699024] coresight-etm4x 7640000.etm: CPU6: ETM v4.2 initialized [ 6.705646] coresight-etm4x 7740000.etm: CPU7: ETM v4.2 initialized Signed-off-by:
Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org> Reviewed-by:
Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by:
Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by:
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Benjamin Block authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit 1749ef00 ] We had a test-report where, under memory pressure, adding LUNs to the systems would fail (the tests add LUNs strictly in sequence): [ 5525.853432] scsi 0:0:1:1088045124: Direct-Access IBM 2107900 .148 PQ: 0 ANSI: 5 [ 5525.853826] scsi 0:0:1:1088045124: alua: supports implicit TPGS [ 5525.853830] scsi 0:0:1:1088045124: alua: device naa.6005076303ffd32700000000000044da port group 0 rel port 43 [ 5525.853931] sd 0:0:1:1088045124: Attached scsi generic sg10 type 0 [ 5525.854075] sd 0:0:1:1088045124: [sdk] Disabling DIF Type 1 protection [ 5525.855495] sd 0:0:1:1088045124: [sdk] 2097152 512-byte logical blocks: (1.07 GB/1.00 GiB) [ 5525.855606] sd 0:0:1:1088045124: [sdk] Write Protect is off [ 5525.855609] sd 0:0:1:1088045124: [sdk] Mode Sense: ed 00 00 08 [ 5525.855795] sd 0:0:1:1088045124: [sdk] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [ 5525.857838] sdk: sdk1 [ 5525.859468] sd 0:0:1:1088045124: [sdk] Attached SCSI disk [ 5525.865073] sd 0:0:1:1088045124: alua: transition timeout set to 60 seconds [ 5525.865078] sd 0:0:1:1088045124: alua: port group 00 state A preferred supports tolusnA [ 5526.015070] sd 0:0:1:1088045124: alua: port group 00 state A preferred supports tolusnA [ 5526.015213] sd 0:0:1:1088045124: alua: port group 00 state A preferred supports tolusnA [ 5526.587439] scsi_alloc_sdev: Allocation failure during SCSI scanning, some SCSI devices might not be configured [ 5526.588562] scsi_alloc_sdev: Allocation failure during SCSI scanning, some SCSI devices might not be configured Looking at the code of scsi_alloc_sdev(), and all the calling contexts, there seems to be no reason to use GFP_ATMOIC here. All the different call-contexts use a mutex at some point, and nothing in between that requires no sleeping, as far as I could see. Additionally, the code that later allocates the block queue for the device (scsi_mq_alloc_queue()) already uses GFP_KERNEL. There are similar allocations in two other functions: scsi_probe_and_add_lun(), and scsi_add_lun(),; that can also be done with GFP_KERNEL. Here is the contexts for the three functions so far: scsi_alloc_sdev() scsi_probe_and_add_lun() scsi_sequential_lun_scan() __scsi_scan_target() scsi_scan_target() mutex_lock() scsi_scan_channel() scsi_scan_host_selected() mutex_lock() scsi_report_lun_scan() __scsi_scan_target() ... __scsi_add_device() mutex_lock() __scsi_scan_target() ... scsi_report_lun_scan() ... scsi_get_host_dev() mutex_lock() scsi_probe_and_add_lun() ... scsi_add_lun() scsi_probe_and_add_lun() ... So replace all these, and give them a bit of a better chance to succeed, with more chances of reclaim. Signed-off-by:
Benjamin Block <bblock@linux.ibm.com> Reviewed-by:
Bart Van Assche <bvanassche@acm.org> Signed-off-by:
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Paul Kocialkowski authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit 68ef2362 ] According to the chipidea driver bindings, the USB PHY is specified via the "phys" phandle node. However, this only takes effect for USB PHYs that use the common PHY framework. For legacy USB PHYs, a simple lookup based on the USB PHY type is done instead. This does not play out well when more than one USB PHY is registered, since the first registered PHY matching the type will always be returned regardless of what the driver was bound to. Fix this by looking up the PHY based on the "phys" phandle node. Although generic PHYs are rather matched by their "phys-name" and not the "phys" phandle directly, there is no helper for similar lookup on legacy PHYs and it's probably not worth the effort to add it. When no legacy USB PHY is found by phandle, fallback to grabbing any registered USB2 PHY. This ensures backward compatibility if some users were actually relying on this mechanism. Signed-off-by:
Paul Kocialkowski <paul.kocialkowski@bootlin.com> Signed-off-by:
Peter Chen <peter.chen@nxp.com> Signed-off-by:
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Tony Jones authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit 7c5b019e ] Fix buffer overflow observed when running perf test. The overflow is when trying to evaluate "1ULL << (64 - 1)" which is resulting in -9223372036854775808 which overflows the 20 character buffer. If is possible this bug has been reported before but I still don't see any fix checked in: See: https://www.spinics.net/lists/linux-perf-users/msg07714.htmlReported-by:
Michael Sartain <mikesart@fastmail.com> Reported-by:
Mathias Krause <minipli@googlemail.com> Signed-off-by:
Tony Jones <tonyj@suse.de> Acked-by:
Steven Rostedt (VMware) <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Fixes: f7d82350 ("tools/events: Add files to create libtraceevent.a") Link: http://lkml.kernel.org/r/20190228015532.8941-1-tonyj@suse.deSigned-off-by:
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Carlos Maiolino authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit dce30ca9 ] guard_bio_eod() can truncate a segment in bio to allow it to do IO on odd last sectors of a device. It already checks if the IO starts past EOD, but it does not consider the possibility of an IO request starting within device boundaries can contain more than one segment past EOD. In such cases, truncated_bytes can be bigger than PAGE_SIZE, and will underflow bvec->bv_len. Fix this by checking if truncated_bytes is lower than PAGE_SIZE. This situation has been found on filesystems such as isofs and vfat, which doesn't check the device size before mount, if the device is smaller than the filesystem itself, a readahead on such filesystem, which spans EOD, can trigger this situation, leading a call to zero_user() with a wrong size possibly corrupting memory. I didn't see any crash, or didn't let the system run long enough to check if memory corruption will be hit somewhere, but adding instrumentation to guard_bio_end() to check truncated_bytes size, was enough to see the error. The following script can trigger the error. MNT=/mnt IMG=./DISK.img DEV=/dev/loop0 mkfs.vfat $IMG mount $IMG $MNT cp -R /etc $MNT &> /dev/null umount $MNT losetup -D losetup --find --show --sizelimit 16247280 $IMG mount $DEV $MNT find $MNT -type f -exec cat {} + >/dev/null Kudos to Eric Sandeen for coming up with the reproducer above Reviewed-by:
Ming Lei <ming.lei@redhat.com> Signed-off-by:
Carlos Maiolino <cmaiolino@redhat.com> Signed-off-by:
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Yao Liu authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit 68e2672f ] There is a NULL pointer dereference of devname in strspn() The oops looks something like: CIFS: Attempting to mount (null) BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 ... RIP: 0010:strspn+0x0/0x50 ... Call Trace: ? cifs_parse_mount_options+0x222/0x1710 [cifs] ? cifs_get_volume_info+0x2f/0x80 [cifs] cifs_setup_volume_info+0x20/0x190 [cifs] cifs_get_volume_info+0x50/0x80 [cifs] cifs_smb3_do_mount+0x59/0x630 [cifs] ? ida_alloc_range+0x34b/0x3d0 cifs_do_mount+0x11/0x20 [cifs] mount_fs+0x52/0x170 vfs_kern_mount+0x6b/0x170 do_mount+0x216/0xdc0 ksys_mount+0x83/0xd0 __x64_sys_mount+0x25/0x30 do_syscall_64+0x65/0x220 entry_SYSCALL_64_after_hwframe+0x49/0xbe Fix this by adding a NULL check on devname in cifs_parse_devname() Signed-off-by:
Yao Liu <yotta.liu@ucloud.cn> Signed-off-by:
Steve French <stfrench@microsoft.com> Signed-off-by:
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Jason Cai (Xiang Feng) authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit 70de2cbd ] Invoking dm_get_device() twice on the same device path with different modes is dangerous. Because in that case, upgrade_mode() will alloc a new 'dm_dev' and free the old one, which may be referenced by a previous caller. Dereferencing the dangling pointer will trigger kernel NULL pointer dereference. The following two cases can reproduce this issue. Actually, they are invalid setups that must be disallowed, e.g.: 1. Creating a thin-pool with read_only mode, and the same device as both metadata and data. dmsetup create thinp --table \ "0 41943040 thin-pool /dev/vdb /dev/vdb 128 0 1 read_only" BUG: unable to handle kernel NULL pointer dereference at 0000000000000080 ... Call Trace: new_read+0xfb/0x110 [dm_bufio] dm_bm_read_lock+0x43/0x190 [dm_persistent_data] ? kmem_cache_alloc_trace+0x15c/0x1e0 __create_persistent_data_objects+0x65/0x3e0 [dm_thin_pool] dm_pool_metadata_open+0x8c/0xf0 [dm_thin_pool] pool_ctr.cold.79+0x213/0x913 [dm_thin_pool] ? realloc_argv+0x50/0x70 [dm_mod] dm_table_add_target+0x14e/0x330 [dm_mod] table_load+0x122/0x2e0 [dm_mod] ? dev_status+0x40/0x40 [dm_mod] ctl_ioctl+0x1aa/0x3e0 [dm_mod] dm_ctl_ioctl+0xa/0x10 [dm_mod] do_vfs_ioctl+0xa2/0x600 ? handle_mm_fault+0xda/0x200 ? __do_page_fault+0x26c/0x4f0 ksys_ioctl+0x60/0x90 __x64_sys_ioctl+0x16/0x20 do_syscall_64+0x55/0x150 entry_SYSCALL_64_after_hwframe+0x44/0xa9 2. Creating a external snapshot using the same thin-pool device. dmsetup create thinp --table \ "0 41943040 thin-pool /dev/vdc /dev/vdb 128 0 2 ignore_discard" dmsetup message /dev/mapper/thinp 0 "create_thin 0" dmsetup create snap --table \ "0 204800 thin /dev/mapper/thinp 0 /dev/mapper/thinp" BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 ... Call Trace: ? __alloc_pages_nodemask+0x13c/0x2e0 retrieve_status+0xa5/0x1f0 [dm_mod] ? dm_get_live_or_inactive_table.isra.7+0x20/0x20 [dm_mod] table_status+0x61/0xa0 [dm_mod] ctl_ioctl+0x1aa/0x3e0 [dm_mod] dm_ctl_ioctl+0xa/0x10 [dm_mod] do_vfs_ioctl+0xa2/0x600 ksys_ioctl+0x60/0x90 ? ksys_write+0x4f/0xb0 __x64_sys_ioctl+0x16/0x20 do_syscall_64+0x55/0x150 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Signed-off-by:
Jason Cai (Xiang Feng) <jason.cai@linux.alibaba.com> Signed-off-by:
Mike Snitzer <snitzer@redhat.com> Signed-off-by:
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Louis Taylor authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit 259594be ] When compiling with -Wformat, clang emits the following warnings: fs/cifs/smb1ops.c:312:20: warning: format specifies type 'unsigned short' but the argument has type 'unsigned int' [-Wformat] tgt_total_cnt, total_in_tgt); ^~~~~~~~~~~~ fs/cifs/cifs_dfs_ref.c:289:4: warning: format specifies type 'short' but the argument has type 'int' [-Wformat] ref->flags, ref->server_type); ^~~~~~~~~~ fs/cifs/cifs_dfs_ref.c:289:16: warning: format specifies type 'short' but the argument has type 'int' [-Wformat] ref->flags, ref->server_type); ^~~~~~~~~~~~~~~~ fs/cifs/cifs_dfs_ref.c:291:4: warning: format specifies type 'short' but the argument has type 'int' [-Wformat] ref->ref_flag, ref->path_consumed); ^~~~~~~~~~~~~ fs/cifs/cifs_dfs_ref.c:291:19: warning: format specifies type 'short' but the argument has type 'int' [-Wformat] ref->ref_flag, ref->path_consumed); ^~~~~~~~~~~~~~~~~~ The types of these arguments are unconditionally defined, so this patch updates the format character to the correct ones for ints and unsigned ints. Link: https://github.com/ClangBuiltLinux/linux/issues/378Signed-off-by:
Louis Taylor <louis@kragniz.eu> Signed-off-by:
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Shuriyc Chu authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit 5704a068 ] (Taken from https://bugzilla.kernel.org/show_bug.cgi?id=200647) 'get_unused_fd_flags' in kthread cause kernel crash. It works fine on 4.1, but causes crash after get 64 fds. It also cause crash on ubuntu1404/1604/1804, centos7.5, and the crash messages are almost the same. The crash message on centos7.5 shows below: start fd 61 start fd 62 start fd 63 BUG: unable to handle kernel NULL pointer dereference at (null) IP: __wake_up_common+0x2e/0x90 PGD 0 Oops: 0000 [#1] SMP Modules linked in: test(OE) xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 tun bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter devlink sunrpc kvm_intel kvm irqbypass crc32_pclmul ghash_clmulni_intel aesni_intel lrw gf128mul glue_helper ablk_helper cryptd sg ppdev pcspkr virtio_balloon parport_pc parport i2c_piix4 joydev ip_tables xfs libcrc32c sr_mod cdrom sd_mod crc_t10dif crct10dif_generic ata_generic pata_acpi virtio_scsi virtio_console virtio_net cirrus drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm crct10dif_pclmul crct10dif_common crc32c_intel drm ata_piix serio_raw libata virtio_pci virtio_ring i2c_core virtio floppy dm_mirror dm_region_hash dm_log dm_mod CPU: 2 PID: 1820 Comm: test_fd Kdump: loaded Tainted: G OE ------------ 3.10.0-862.3.3.el7.x86_64 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.10.2-0-g5f4c7b1-prebuilt.qemu-project.org 04/01/2014 task: ffff8e92b9431fa0 ti: ffff8e94247a0000 task.ti: ffff8e94247a0000 RIP: 0010:__wake_up_common+0x2e/0x90 RSP: 0018:ffff8e94247a2d18 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffffffff9d09daa0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffffffff9d09daa0 RBP: ffff8e94247a2d50 R08: 0000000000000000 R09: ffff8e92b95dfda8 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff9d09daa8 R13: 0000000000000003 R14: 0000000000000000 R15: 0000000000000003 FS: 0000000000000000(0000) GS:ffff8e9434e80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000017c686000 CR4: 00000000000207e0 Call Trace: __wake_up+0x39/0x50 expand_files+0x131/0x250 __alloc_fd+0x47/0x170 get_unused_fd_flags+0x30/0x40 test_fd+0x12a/0x1c0 [test] kthread+0xd1/0xe0 ret_from_fork_nospec_begin+0x21/0x21 Code: 66 90 55 48 89 e5 41 57 41 89 f7 41 56 41 89 ce 41 55 41 54 49 89 fc 49 83 c4 08 53 48 83 ec 10 48 8b 47 08 89 55 cc 4c 89 45 d0 <48> 8b 08 49 39 c4 48 8d 78 e8 4c 8d 69 e8 75 08 eb 3b 4c 89 ef RIP __wake_up_common+0x2e/0x90 RSP <ffff8e94247a2d18> CR2: 0000000000000000 This issue exists since CentOS 7.5 3.10.0-862 and CentOS 7.4 (3.10.0-693.21.1 ) is ok. Root cause: the item 'resize_wait' is not initialized before being used. Reported-by:
Richard Zhang <zhang.zijian@h3c.com> Reviewed-by:
Andrew Morton <akpm@linux-foundation.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
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Sahitya Tummala authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit 9083977d ] Fix below warning coming because of using mutex lock in atomic context. BUG: sleeping function called from invalid context at kernel/locking/mutex.c:98 in_atomic(): 1, irqs_disabled(): 0, pid: 585, name: sh Preemption disabled at: __radix_tree_preload+0x28/0x130 Call trace: dump_backtrace+0x0/0x2b4 show_stack+0x20/0x28 dump_stack+0xa8/0xe0 ___might_sleep+0x144/0x194 __might_sleep+0x58/0x8c mutex_lock+0x2c/0x48 f2fs_trace_pid+0x88/0x14c f2fs_set_node_page_dirty+0xd0/0x184 Do not use f2fs_radix_tree_insert() to avoid doing cond_resched() with spin_lock() acquired. Signed-off-by:
Sahitya Tummala <stummala@codeaurora.org> Reviewed-by:
Chao Yu <yuchao0@huawei.com> Signed-off-by:
Jaegeuk Kim <jaegeuk@kernel.org> Signed-off-by:
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Jia Guo authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit cc725ef3 ] In the process of creating a node, it will cause NULL pointer dereference in kernel if o2cb_ctl failed in the interval (mkdir, o2cb_set_node_attribute(node_num)] in function o2cb_add_node. The node num is initialized to 0 in function o2nm_node_group_make_item, o2nm_node_group_drop_item will mistake the node number 0 for a valid node number when we delete the node before the node number is set correctly. If the local node number of the current host happens to be 0, cluster->cl_local_node will be set to O2NM_INVALID_NODE_NUM while o2hb_thread still running. The panic stack is generated as follows: o2hb_thread \-o2hb_do_disk_heartbeat \-o2hb_check_own_slot |-slot = ®->hr_slots[o2nm_this_node()]; //o2nm_this_node() return O2NM_INVALID_NODE_NUM We need to check whether the node number is set when we delete the node. Link: http://lkml.kernel.org/r/133d8045-72cc-863e-8eae-5013f9f6bc51@huawei.comSigned-off-by:
Jia Guo <guojia12@huawei.com> Reviewed-by:
Joseph Qi <jiangqi903@gmail.com> Acked-by:
Jun Piao <piaojun@huawei.com> Cc: Mark Fasheh <mark@fasheh.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Changwei Ge <ge.changwei@h3c.com> Signed-off-by:
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Qian Cai authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit 92d1d07d ] Kmemleak throws endless warnings during boot due to in __alloc_alien_cache(), alc = kmalloc_node(memsize, gfp, node); init_arraycache(&alc->ac, entries, batch); kmemleak_no_scan(ac); Kmemleak does not track the array cache (alc->ac) but the alien cache (alc) instead, so let it track the latter by lifting kmemleak_no_scan() out of init_arraycache(). There is another place that calls init_arraycache(), but alloc_kmem_cache_cpus() uses the percpu allocation where will never be considered as a leak. kmemleak: Found object by alias at 0xffff8007b9aa7e38 CPU: 190 PID: 1 Comm: swapper/0 Not tainted 5.0.0-rc2+ #2 Call trace: dump_backtrace+0x0/0x168 show_stack+0x24/0x30 dump_stack+0x88/0xb0 lookup_object+0x84/0xac find_and_get_object+0x84/0xe4 kmemleak_no_scan+0x74/0xf4 setup_kmem_cache_node+0x2b4/0x35c __do_tune_cpucache+0x250/0x2d4 do_tune_cpucache+0x4c/0xe4 enable_cpucache+0xc8/0x110 setup_cpu_cache+0x40/0x1b8 __kmem_cache_create+0x240/0x358 create_cache+0xc0/0x198 kmem_cache_create_usercopy+0x158/0x20c kmem_cache_create+0x50/0x64 fsnotify_init+0x58/0x6c do_one_initcall+0x194/0x388 kernel_init_freeable+0x668/0x688 kernel_init+0x18/0x124 ret_from_fork+0x10/0x18 kmemleak: Object 0xffff8007b9aa7e00 (size 256): kmemleak: comm "swapper/0", pid 1, jiffies 4294697137 kmemleak: min_count = 1 kmemleak: count = 0 kmemleak: flags = 0x1 kmemleak: checksum = 0 kmemleak: backtrace: kmemleak_alloc+0x84/0xb8 kmem_cache_alloc_node_trace+0x31c/0x3a0 __kmalloc_node+0x58/0x78 setup_kmem_cache_node+0x26c/0x35c __do_tune_cpucache+0x250/0x2d4 do_tune_cpucache+0x4c/0xe4 enable_cpucache+0xc8/0x110 setup_cpu_cache+0x40/0x1b8 __kmem_cache_create+0x240/0x358 create_cache+0xc0/0x198 kmem_cache_create_usercopy+0x158/0x20c kmem_cache_create+0x50/0x64 fsnotify_init+0x58/0x6c do_one_initcall+0x194/0x388 kernel_init_freeable+0x668/0x688 kernel_init+0x18/0x124 kmemleak: Not scanning unknown object at 0xffff8007b9aa7e38 CPU: 190 PID: 1 Comm: swapper/0 Not tainted 5.0.0-rc2+ #2 Call trace: dump_backtrace+0x0/0x168 show_stack+0x24/0x30 dump_stack+0x88/0xb0 kmemleak_no_scan+0x90/0xf4 setup_kmem_cache_node+0x2b4/0x35c __do_tune_cpucache+0x250/0x2d4 do_tune_cpucache+0x4c/0xe4 enable_cpucache+0xc8/0x110 setup_cpu_cache+0x40/0x1b8 __kmem_cache_create+0x240/0x358 create_cache+0xc0/0x198 kmem_cache_create_usercopy+0x158/0x20c kmem_cache_create+0x50/0x64 fsnotify_init+0x58/0x6c do_one_initcall+0x194/0x388 kernel_init_freeable+0x668/0x688 kernel_init+0x18/0x124 ret_from_fork+0x10/0x18 Link: http://lkml.kernel.org/r/20190129184518.39808-1-cai@lca.pw Fixes: 1fe00d50 ("slab: factor out initialization of array cache") Signed-off-by:
Qian Cai <cai@lca.pw> Reviewed-by:
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Uladzislau Rezki (Sony) authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit afd07389 ] One of the vmalloc stress test case triggers the kernel BUG(): <snip> [60.562151] ------------[ cut here ]------------ [60.562154] kernel BUG at mm/vmalloc.c:512! [60.562206] invalid opcode: 0000 [#1] PREEMPT SMP PTI [60.562247] CPU: 0 PID: 430 Comm: vmalloc_test/0 Not tainted 4.20.0+ #161 [60.562293] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014 [60.562351] RIP: 0010:alloc_vmap_area+0x36f/0x390 <snip> it can happen due to big align request resulting in overflowing of calculated address, i.e. it becomes 0 after ALIGN()'s fixup. Fix it by checking if calculated address is within vstart/vend range. Link: http://lkml.kernel.org/r/20190124115648.9433-2-urezki@gmail.comSigned-off-by:
Uladzislau Rezki (Sony) <urezki@gmail.com> Reviewed-by:
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Qian Cai authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit 0c815854 ] After offlining a memory block, kmemleak scan will trigger a crash, as it encounters a page ext address that has already been freed during memory offlining. At the beginning in alloc_page_ext(), it calls kmemleak_alloc(), but it does not call kmemleak_free() in free_page_ext(). BUG: unable to handle kernel paging request at ffff888453d00000 PGD 128a01067 P4D 128a01067 PUD 128a04067 PMD 47e09e067 PTE 800ffffbac2ff060 Oops: 0000 [#1] SMP DEBUG_PAGEALLOC KASAN PTI CPU: 1 PID: 1594 Comm: bash Not tainted 5.0.0-rc8+ #15 Hardware name: HP ProLiant DL180 Gen9/ProLiant DL180 Gen9, BIOS U20 10/25/2017 RIP: 0010:scan_block+0xb5/0x290 Code: 85 6e 01 00 00 48 b8 00 00 30 f5 81 88 ff ff 48 39 c3 0f 84 5b 01 00 00 48 89 d8 48 c1 e8 03 42 80 3c 20 00 0f 85 87 01 00 00 <4c> 8b 3b e8 f3 0c fa ff 4c 39 3d 0c 6b 4c 01 0f 87 08 01 00 00 4c RSP: 0018:ffff8881ec57f8e0 EFLAGS: 00010082 RAX: 0000000000000000 RBX: ffff888453d00000 RCX: ffffffffa61e5a54 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888453d00000 RBP: ffff8881ec57f920 R08: fffffbfff4ed588d R09: fffffbfff4ed588c R10: fffffbfff4ed588c R11: ffffffffa76ac463 R12: dffffc0000000000 R13: ffff888453d00ff9 R14: ffff8881f80cef48 R15: ffff8881f80cef48 FS: 00007f6c0e3f8740(0000) GS:ffff8881f7680000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff888453d00000 CR3: 00000001c4244003 CR4: 00000000001606a0 Call Trace: scan_gray_list+0x269/0x430 kmemleak_scan+0x5a8/0x10f0 kmemleak_write+0x541/0x6ca full_proxy_write+0xf8/0x190 __vfs_write+0xeb/0x980 vfs_write+0x15a/0x4f0 ksys_write+0xd2/0x1b0 __x64_sys_write+0x73/0xb0 do_syscall_64+0xeb/0xaaa entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f6c0dad73b8 Code: 89 02 48 c7 c0 ff ff ff ff eb b3 0f 1f 80 00 00 00 00 f3 0f 1e fa 48 8d 05 65 63 2d 00 8b 00 85 c0 75 17 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 41 54 49 89 d4 55 RSP: 002b:00007ffd5b863cb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007f6c0dad73b8 RDX: 0000000000000005 RSI: 000055a9216e1710 RDI: 0000000000000001 RBP: 000055a9216e1710 R08: 000000000000000a R09: 00007ffd5b863840 R10: 000000000000000a R11: 0000000000000246 R12: 00007f6c0dda9780 R13: 0000000000000005 R14: 00007f6c0dda4740 R15: 0000000000000005 Modules linked in: nls_iso8859_1 nls_cp437 vfat fat kvm_intel kvm irqbypass efivars ip_tables x_tables xfs sd_mod ahci libahci igb i2c_algo_bit libata i2c_core dm_mirror dm_region_hash dm_log dm_mod efivarfs CR2: ffff888453d00000 ---[ end trace ccf646c7456717c5 ]--- Kernel panic - not syncing: Fatal exception Shutting down cpus with NMI Kernel Offset: 0x24c00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) ---[ end Kernel panic - not syncing: Fatal exception ]--- Link: http://lkml.kernel.org/r/20190227173147.75650-1-cai@lca.pwSigned-off-by:
Catalin Marinas <catalin.marinas@arm.com> Signed-off-by:
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Peng Fan authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit 0d3bd18a ] In case cma_init_reserved_mem failed, need to free the memblock allocated by memblock_reserve or memblock_alloc_range. Quote Catalin's comments: https://lkml.org/lkml/2019/2/26/482 Kmemleak is supposed to work with the memblock_{alloc,free} pair and it ignores the memblock_reserve() as a memblock_alloc() implementation detail. It is, however, tolerant to memblock_free() being called on a sub-range or just a different range from a previous memblock_alloc(). So the original patch looks fine to me. FWIW: Link: http://lkml.kernel.org/r/20190227144631.16708-1-peng.fan@nxp.comSigned-off-by:
Peng Fan <peng.fan@nxp.com> Reviewed-by:
Mike Rapoport <rppt@linux.ibm.com> Cc: Laura Abbott <labbott@redhat.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: Andrey Konovalov <andreyknvl@google.com> Signed-off-by:
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Arnd Bergmann authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit 43d28166 ] The enic driver relies on the CONFIG_CPUMASK_OFFSTACK feature to dynamically allocate a struct member, but this is normally intended for local variables. Building with clang, I get a warning for a few locations that check the address of the cpumask_var_t: drivers/net/ethernet/cisco/enic/enic_main.c:122:22: error: address of array 'enic->msix[i].affinity_mask' will always evaluate to 'true' [-Werror,-Wpointer-bool-conversion] As far as I can tell, the code is still correct, as the truth value of the pointer is what we need in this configuration. To get rid of the warning, use cpumask_available() instead of checking the pointer directly. Fixes: 322cf7e3 ("enic: assign affinity hint to interrupts") Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Reviewed-by:
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Christian Brauner authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit 32a5ad9c ] Currently, when writing echo 18446744073709551616 > /proc/sys/fs/file-max /proc/sys/fs/file-max will overflow and be set to 0. That quickly crashes the system. This commit sets the max and min value for file-max. The max value is set to long int. Any higher value cannot currently be used as the percpu counters are long ints and not unsigned integers. Note that the file-max value is ultimately parsed via __do_proc_doulongvec_minmax(). This function does not report error when min or max are exceeded. Which means if a value largen that long int is written userspace will not receive an error instead the old value will be kept. There is an argument to be made that this should be changed and __do_proc_doulongvec_minmax() should return an error when a dedicated min or max value are exceeded. However this has the potential to break userspace so let's defer this to an RFC patch. Link: http://lkml.kernel.org/r/20190107222700.15954-3-christian@brauner.ioSigned-off-by:
Christian Brauner <christian@brauner.io> Acked-by:
Kees Cook <keescook@chromium.org> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Joe Lawrence <joe.lawrence@redhat.com> Cc: Luis Chamberlain <mcgrof@kernel.org> Cc: Waiman Long <longman@redhat.com> [christian@brauner.io: v4] Link: http://lkml.kernel.org/r/20190210203943.8227-3-christian@brauner.ioSigned-off-by:
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Russell King authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit d01849f7 ] Tony notes that the GPIO module does not idle when level interrupts are in use, as the wakeup appears to get stuck. After extensive investigation, it appears that the wakeup will only be cleared if the interrupt status register is cleared while the interrupt is enabled. However, we are currently clearing it with the interrupt disabled for level-based interrupts. It is acknowledged that this observed behaviour conflicts with a statement in the TRM: CAUTION After servicing the interrupt, the status bit in the interrupt status register (GPIOi.GPIO_IRQSTATUS_0 or GPIOi.GPIO_IRQSTATUS_1) must be reset and the interrupt line released (by setting the corresponding bit of the interrupt status register to 1) before enabling an interrupt for the GPIO channel in the interrupt-enable register (GPIOi.GPIO_IRQSTATUS_SET_0 or GPIOi.GPIO_IRQSTATUS_SET_1) to prevent the occurrence of unexpected interrupts when enabling an interrupt for the GPIO channel. However, this does not appear to be a practical problem. Further, as reported by Grygorii Strashko <grygorii.strashko@ti.com>, the TI Android kernel tree has an earlier similar patch as "GPIO: OMAP: Fix the sequence to clear the IRQ status" saying: if the status is cleared after disabling the IRQ then sWAKEUP will not be cleared and gates the module transition When we unmask the level interrupt after the interrupt has been handled, enable the interrupt and only then clear the interrupt. If the interrupt is still pending, the hardware will re-assert the interrupt status. Should the caution note in the TRM prove to be a problem, we could use a clear-enable-clear sequence instead. Cc: Aaro Koskinen <aaro.koskinen@iki.fi> Cc: Keerthy <j-keerthy@ti.com> Cc: Peter Ujfalusi <peter.ujfalusi@ti.com> Signed-off-by:
Tony Lindgren <tony@atomide.com> Acked-by:
Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by:
Linus Walleij <linus.walleij@linaro.org> Signed-off-by:
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Douglas Anderson authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit 31b265b3 ] As reported back in 2016-11 [1], the "ftdump" kdb command triggers a BUG for "sleeping function called from invalid context". kdb's "ftdump" command wants to call ring_buffer_read_prepare() in atomic context. A very simple solution for this is to add allocation flags to ring_buffer_read_prepare() so kdb can call it without triggering the allocation error. This patch does that. Note that in the original email thread about this, it was suggested that perhaps the solution for kdb was to either preallocate the buffer ahead of time or create our own iterator. I'm hoping that this alternative of adding allocation flags to ring_buffer_read_prepare() can be considered since it means I don't need to duplicate more of the core trace code into "trace_kdb.c" (for either creating my own iterator or re-preparing a ring allocator whose memory was already allocated). NOTE: another option for kdb is to actually figure out how to make it reuse the existing ftrace_dump() function and totally eliminate the duplication. This sounds very appealing and actually works (the "sr z" command can be seen to properly dump the ftrace buffer). The downside here is that ftrace_dump() fully consumes the trace buffer. Unless that is changed I'd rather not use it because it means "ftdump | grep xyz" won't be very useful to search the ftrace buffer since it will throw away the whole trace on the first grep. A future patch to dump only the last few lines of the buffer will also be hard to implement. [1] https://lkml.kernel.org/r/20161117191605.GA21459@google.com Link: http://lkml.kernel.org/r/20190308193205.213659-1-dianders@chromium.orgReported-by:
Brian Norris <briannorris@chromium.org> Signed-off-by:
Douglas Anderson <dianders@chromium.org> Signed-off-by:
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Masahiro Yamada authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit fc2b47b5 ] It believe it is a bad idea to hardcode a specific compiler prefix that may or may not be installed on a user's system. It is annoying when testing features that should not require compilers at all. For example, mrproper, headers_install, etc. should work without any compiler. They look like follows on my machine. $ make ARCH=h8300 mrproper ./scripts/gcc-version.sh: line 26: h8300-unknown-linux-gcc: command not found ./scripts/gcc-version.sh: line 27: h8300-unknown-linux-gcc: command not found make: h8300-unknown-linux-gcc: Command not found make: h8300-unknown-linux-gcc: Command not found [ a bunch of the same error messages continue ] $ make ARCH=h8300 headers_install ./scripts/gcc-version.sh: line 26: h8300-unknown-linux-gcc: command not found ./scripts/gcc-version.sh: line 27: h8300-unknown-linux-gcc: command not found make: h8300-unknown-linux-gcc: Command not found HOSTCC scripts/basic/fixdep make: h8300-unknown-linux-gcc: Command not found WRAP arch/h8300/include/generated/uapi/asm/kvm_para.h [ snip ] The solution is to delete this line, or to use cc-cross-prefix like some architectures do. I chose the latter as a moderate fixup. I added an alternative 'h8300-linux-' because it is available at: https://mirrors.edge.kernel.org/pub/tools/crosstool/files/bin/x86_64/8.1.0/Signed-off-by:
Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by:
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Aurelien Aptel authored
BugLink: https://bugs.launchpad.net/bugs/1828420 [ Upstream commit bc31d0cd ] We have a customer reporting crashes in lock_get_status() with many "Leaked POSIX lock" messages preceeding the crash. Leaked POSIX lock on dev=0x0:0x56 ... Leaked POSIX lock on dev=0x0:0x56 ... Leaked POSIX lock on dev=0x0:0x56 ... Leaked POSIX lock on dev=0x0:0x53 ... Leaked POSIX lock on dev=0x0:0x53 ... Leaked POSIX lock on dev=0x0:0x53 ... Leaked POSIX lock on dev=0x0:0x53 ... POSIX: fl_owner=ffff8900e7b79380 fl_flags=0x1 fl_type=0x1 fl_pid=20709 Leaked POSIX lock on dev=0x0:0x4b ino... Leaked locks on dev=0x0:0x4b ino=0xf911400000029: POSIX: fl_owner=ffff89f41c870e00 fl_flags=0x1 fl_type=0x1 fl_pid=19592 stack segment: 0000 [#1] SMP Modules linked in: binfmt_misc msr tcp_diag udp_diag inet_diag unix_diag af_packet_diag netlink_diag rpcsec_gss_krb5 arc4 ecb auth_rpcgss nfsv4 md4 nfs nls_utf8 lockd grace cifs sunrpc ccm dns_resolver fscache af_packet iscsi_ibft iscsi_boot_sysfs vmw_vsock_vmci_transport vsock xfs libcrc32c sb_edac edac_core crct10dif_pclmul crc32_pclmul ghash_clmulni_intel drbg ansi_cprng vmw_balloon aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd joydev pcspkr vmxnet3 i2c_piix4 vmw_vmci shpchp fjes processor button ac btrfs xor raid6_pq sr_mod cdrom ata_generic sd_mod ata_piix vmwgfx crc32c_intel drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm serio_raw ahci libahci drm libata vmw_pvscsi sg dm_multipath dm_mod scsi_dh_rdac scsi_dh_emc scsi_dh_alua scsi_mod autofs4 Supported: Yes CPU: 6 PID: 28250 Comm: lsof Not tainted 4.4.156-94.64-default #1 Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 04/05/2016 task: ffff88a345f28740 ti: ffff88c74005c000 task.ti: ffff88c74005c000 RIP: 0010:[<ffffffff8125dcab>] [<ffffffff8125dcab>] lock_get_status+0x9b/0x3b0 RSP: 0018:ffff88c74005fd90 EFLAGS: 00010202 RAX: ffff89bde83e20ae RBX: ffff89e870003d18 RCX: 0000000049534f50 RDX: ffffffff81a3541f RSI: ffffffff81a3544e RDI: ffff89bde83e20ae RBP: 0026252423222120 R08: 0000000020584953 R09: 000000000000ffff R10: 0000000000000000 R11: ffff88c74005fc70 R12: ffff89e5ca7b1340 R13: 00000000000050e5 R14: ffff89e870003d30 R15: ffff89e5ca7b1340 FS: 00007fafd64be800(0000) GS:ffff89f41fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001c80018 CR3: 000000a522048000 CR4: 0000000000360670 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: 0000000000000208 ffffffff81a3d6b6 ffff89e870003d30 ffff89e870003d18 ffff89e5ca7b1340 ffff89f41738d7c0 ffff89e870003d30 ffff89e5ca7b1340 ffffffff8125e08f 0000000000000000 ffff89bc22b67d00 ffff88c74005ff28 Call Trace: [<ffffffff8125e08f>] locks_show+0x2f/0x70 [<ffffffff81230ad1>] seq_read+0x251/0x3a0 [<ffffffff81275bbc>] proc_reg_read+0x3c/0x70 [<ffffffff8120e456>] __vfs_read+0x26/0x140 [<ffffffff8120e9da>] vfs_read+0x7a/0x120 [<ffffffff8120faf2>] SyS_read+0x42/0xa0 [<ffffffff8161cbc3>] entry_SYSCALL_64_fastpath+0x1e/0xb7 When Linux closes a FD (close(), close-on-exec, dup2(), ...) it calls filp_close() which also removes all posix locks. The lock struct is initialized like so in filp_close() and passed down to cifs ... lock.fl_type = F_UNLCK; lock.fl_flags = FL_POSIX | FL_CLOSE; lock.fl_start = 0; lock.fl_end = OFFSET_MAX; ... Note the FL_CLOSE flag, which hints the VFS code that this unlocking is done for closing the fd. filp_close() locks_remove_posix(filp, id); vfs_lock_file(filp, F_SETLK, &lock, NULL); return filp->f_op->lock(filp, cmd, fl) => cifs_lock() rc = cifs_setlk(file, flock, type, wait_flag, posix_lck, lock, unlock, xid); rc = server->ops->mand_unlock_range(cfile, flock, xid); if (flock->fl_flags & FL_POSIX && !rc) rc = locks_lock_file_wait(file, flock) Notice how we don't call locks_lock_file_wait() which does the generic VFS lock/unlock/wait work on the inode if rc != 0. If we are closing the handle, the SMB server is supposed to remove any locks associated with it. Similarly, cifs.ko frees and wakes up any lock and lock waiter when closing the file: cifs_close() cifsFileInfo_put(file->private_data) /* * Delete any outstanding lock records. We'll lose them when the file * is closed anyway. */ down_write(&cifsi->lock_sem); list_for_each_entry_safe(li, tmp, &cifs_file->llist->locks, llist) { list_del(&li->llist); cifs_del_lock_waiters(li); kfree(li); } list_del(&cifs_file->llist->llist); kfree(cifs_file->llist); up_write(&cifsi->lock_sem); So we can safely ignore unlocking failures in cifs_lock() if they happen with the FL_CLOSE flag hint set as both the server and the client take care of it during the actual closing. This is not a proper fix for the unlocking failure but it's safe and it seems to prevent the lock leakages and crashes the customer experiences. Signed-off-by:
Aurelien Aptel <aaptel@suse.com> Signed-off-by:
NeilBrown <neil@brown.name> Signed-off-by:
Pavel Shilovsky <pshilov@microsoft.com> Signed-off-by:
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Razvan Stefanescu authored
BugLink: https://bugs.launchpad.net/bugs/1828420 commit 69646d7a upstream. In half-duplex operation, RX should be started after TX completes. If DMA is used, there is a case when the DMA transfer completes but the TX FIFO is not emptied, so the RX cannot be restarted just yet. Use a boolean variable to store this state and rearm TX interrupt mask to be signaled again that the transfer finished. In interrupt transmit handler this variable is used to start RX. A warning message is generated if RX is activated before TX fifo is cleared. Fixes: b389f173 ("tty/serial: atmel: RS485 half duplex w/DMA: enable RX after TX is done") Signed-off-by:
Razvan Stefanescu <razvan.stefanescu@microchip.com> Acked-by:
Richard Genoud <richard.genoud@gmail.com> Cc: stable <stable@vger.kernel.org> Signed-off-by:
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