- 26 Aug, 2020 28 commits
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Eric Sandeen authored
[ Upstream commit 5872331b ] If for any reason a directory passed to do_split() does not have enough active entries to exceed half the size of the block, we can end up iterating over all "count" entries without finding a split point. In this case, count == move, and split will be zero, and we will attempt a negative index into map[]. Guard against this by detecting this case, and falling back to split-to-half-of-count instead; in this case we will still have plenty of space (> half blocksize) in each split block. Fixes: ef2b02d3 ("ext34: ensure do_split leaves enough free space in both blocks") Signed-off-by:
Eric Sandeen <sandeen@redhat.com> Reviewed-by:
Andreas Dilger <adilger@dilger.ca> Reviewed-by:
Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/f53e246b-647c-64bb-16ec-135383c70ad7@redhat.comSigned-off-by:
Theodore Ts'o <tytso@mit.edu> Signed-off-by:
Sasha Levin <sashal@kernel.org>
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Luc Van Oostenryck authored
[ Upstream commit bd72866b ] These accessors must be used to read/write a big-endian bus. The value returned or written is native-endian. However, these accessors are defined using be{16,32}_to_cpu() or cpu_to_be{16,32}() to make the endian conversion but these expect a __be{16,32} when none is present. Keeping them would need a force cast that would solve nothing at all. So, do the conversion using swab{16,32}, like done in asm-generic for similar situations. Reported-by:
kernel test robot <lkp@intel.com> Signed-off-by:
Luc Van Oostenryck <luc.vanoostenryck@gmail.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Cc: Stephen Boyd <sboyd@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Link: http://lkml.kernel.org/r/20200622114232.80039-1-luc.vanoostenryck@gmail.comSigned-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
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Eiichi Tsukata authored
[ Upstream commit 96cf2a2c ] If xfs_sysfs_init is called with parent_kobj == NULL, UBSAN shows the following warning: UBSAN: null-ptr-deref in ./fs/xfs/xfs_sysfs.h:37:23 member access within null pointer of type 'struct xfs_kobj' Call Trace: dump_stack+0x10e/0x195 ubsan_type_mismatch_common+0x241/0x280 __ubsan_handle_type_mismatch_v1+0x32/0x40 init_xfs_fs+0x12b/0x28f do_one_initcall+0xdd/0x1d0 do_initcall_level+0x151/0x1b6 do_initcalls+0x50/0x8f do_basic_setup+0x29/0x2b kernel_init_freeable+0x19f/0x20b kernel_init+0x11/0x1e0 ret_from_fork+0x22/0x30 Fix it by checking parent_kobj before the code accesses its member. Signed-off-by:
Eiichi Tsukata <devel@etsukata.com> Reviewed-by:
Darrick J. Wong <darrick.wong@oracle.com> [darrick: minor whitespace edits] Signed-off-by:
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Mao Wenan authored
[ Upstream commit 481a0d74 ] The loop may exist if vq->broken is true, virtqueue_get_buf_ctx_packed or virtqueue_get_buf_ctx_split will return NULL, so virtnet_poll will reschedule napi to receive packet, it will lead cpu usage(si) to 100%. call trace as below: virtnet_poll virtnet_receive virtqueue_get_buf_ctx virtqueue_get_buf_ctx_packed virtqueue_get_buf_ctx_split virtqueue_napi_complete virtqueue_poll //return true virtqueue_napi_schedule //it will reschedule napi to fix this, return false if vq is broken in virtqueue_poll. Signed-off-by:
Mao Wenan <wenan.mao@linux.alibaba.com> Acked-by:
Michael S. Tsirkin <mst@redhat.com> Link: https://lore.kernel.org/r/1596354249-96204-1-git-send-email-wenan.mao@linux.alibaba.comSigned-off-by:
Jason Wang <jasowang@redhat.com> Signed-off-by:
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Javed Hasan authored
[ Upstream commit ec007ef4 ] In fc_disc_gpn_id_resp(), skb is supposed to get freed in all cases except for PTR_ERR. However, in some cases it didn't. This fix is to call fc_frame_free(fp) before function returns. Link: https://lore.kernel.org/r/20200729081824.30996-2-jhasan@marvell.comReviewed-by:
Girish Basrur <gbasrur@marvell.com> Reviewed-by:
Santosh Vernekar <svernekar@marvell.com> Reviewed-by:
Saurav Kashyap <skashyap@marvell.com> Reviewed-by:
Shyam Sundar <ssundar@marvell.com> Signed-off-by:
Javed Hasan <jhasan@marvell.com> Signed-off-by:
Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by:
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Zhe Li authored
[ Upstream commit 798b7347 ] The log of UAF problem is listed below. BUG: KASAN: use-after-free in jffs2_rmdir+0xa4/0x1cc [jffs2] at addr c1f165fc Read of size 4 by task rm/8283 ============================================================================= BUG kmalloc-32 (Tainted: P B O ): kasan: bad access detected ----------------------------------------------------------------------------- INFO: Allocated in 0xbbbbbbbb age=3054364 cpu=0 pid=0 0xb0bba6ef jffs2_write_dirent+0x11c/0x9c8 [jffs2] __slab_alloc.isra.21.constprop.25+0x2c/0x44 __kmalloc+0x1dc/0x370 jffs2_write_dirent+0x11c/0x9c8 [jffs2] jffs2_do_unlink+0x328/0x5fc [jffs2] jffs2_rmdir+0x110/0x1cc [jffs2] vfs_rmdir+0x180/0x268 do_rmdir+0x2cc/0x300 ret_from_syscall+0x0/0x3c INFO: Freed in 0x205b age=3054364 cpu=0 pid=0 0x2e9173 jffs2_add_fd_to_list+0x138/0x1dc [jffs2] jffs2_add_fd_to_list+0x138/0x1dc [jffs2] jffs2_garbage_collect_dirent.isra.3+0x21c/0x288 [jffs2] jffs2_garbage_collect_live+0x16bc/0x1800 [jffs2] jffs2_garbage_collect_pass+0x678/0x11d4 [jffs2] jffs2_garbage_collect_thread+0x1e8/0x3b0 [jffs2] kthread+0x1a8/0x1b0 ret_from_kernel_thread+0x5c/0x64 Call Trace: [c17ddd20] [c02452d4] kasan_report.part.0+0x298/0x72c (unreliable) [c17ddda0] [d2509680] jffs2_rmdir+0xa4/0x1cc [jffs2] [c17dddd0] [c026da04] vfs_rmdir+0x180/0x268 [c17dde00] [c026f4e4] do_rmdir+0x2cc/0x300 [c17ddf40] [c001a658] ret_from_syscall+0x0/0x3c The root cause is that we don't get "jffs2_inode_info.sem" before we scan list "jffs2_inode_info.dents" in function jffs2_rmdir. This patch add codes to get "jffs2_inode_info.sem" before we scan "jffs2_inode_info.dents" to slove the UAF problem. Signed-off-by:
Zhe Li <lizhe67@huawei.com> Reviewed-by:
Hou Tao <houtao1@huawei.com> Signed-off-by:
Richard Weinberger <richard@nod.at> Signed-off-by:
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Darrick J. Wong authored
[ Upstream commit f959b5d0 ] xfs_trans_dqresv is the function that we use to make reservations against resource quotas. Each resource contains two counters: the q_core counter, which tracks resources allocated on disk; and the dquot reservation counter, which tracks how much of that resource has either been allocated or reserved by threads that are working on metadata updates. For disk blocks, we compare the proposed reservation counter against the hard and soft limits to decide if we're going to fail the operation. However, for inodes we inexplicably compare against the q_core counter, not the incore reservation count. Since the q_core counter is always lower than the reservation count and we unlock the dquot between reservation and transaction commit, this means that multiple threads can reserve the last inode count before we hit the hard limit, and when they commit, we'll be well over the hard limit. Fix this by checking against the incore inode reservation counter, since we would appear to maintain that correctly (and that's what we report in GETQUOTA). Signed-off-by:
Allison Collins <allison.henderson@oracle.com> Reviewed-by:
Chandan Babu R <chandanrlinux@gmail.com> Reviewed-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
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Greg Ungerer authored
[ Upstream commit bdee0e79 ] The Cache Control Register (CACR) of the ColdFire V3 has bits that control high level caching functions, and also enable/disable the use of the alternate stack pointer register (the EUSP bit) to provide separate supervisor and user stack pointer registers. The code as it is today will blindly clear the EUSP bit on cache actions like invalidation. So it is broken for this case - and that will result in failed booting (interrupt entry and exit processing will be completely hosed). This only affects ColdFire V3 parts that support the alternate stack register (like the 5329 for example) - generally speaking new parts do, older parts don't. It has no impact on ColdFire V3 parts with the single stack pointer, like the 5307 for example. Fix the cache bit defines used, so they maintain the EUSP bit when carrying out cache actions through the CACR register. Signed-off-by:
Greg Ungerer <gerg@linux-m68k.org> Signed-off-by:
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Xiongfeng Wang authored
[ Upstream commit 4aec14de ] When I cat parameter 'proto' by sysfs, it displays as follows. It's better to add a newline for easy reading. root@syzkaller:~# cat /sys/module/psmouse/parameters/proto autoroot@syzkaller:~# Signed-off-by:
Xiongfeng Wang <wangxiongfeng2@huawei.com> Link: https://lore.kernel.org/r/20200720073846.120724-1-wangxiongfeng2@huawei.comSigned-off-by:
Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by:
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Evgeny Novikov authored
[ Upstream commit 9c487b0b ] If platform_driver_register() fails within vpss_init() resources are not cleaned up. The patch fixes this issue by introducing the corresponding error handling. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by:
Evgeny Novikov <novikov@ispras.ru> Signed-off-by:
Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by:
Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by:
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Chuhong Yuan authored
[ Upstream commit fc045645 ] budget_register() has no error handling after its failure. Add the missed undo functions for error handling to fix it. Signed-off-by:
Chuhong Yuan <hslester96@gmail.com> Signed-off-by:
Sean Young <sean@mess.org> Signed-off-by:
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Stanley Chu authored
[ Upstream commit c0a18ee0 ] It is confirmed that Micron device needs DELAY_BEFORE_LPM quirk to have a delay before VCC is powered off. Sdd Micron vendor ID and this quirk for Micron devices. Link: https://lore.kernel.org/r/20200612012625.6615-2-stanley.chu@mediatek.comReviewed-by:
Bean Huo <beanhuo@micron.com> Reviewed-by:
Alim Akhtar <alim.akhtar@samsung.com> Signed-off-by:
Stanley Chu <stanley.chu@mediatek.com> Signed-off-by:
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Jan Kara authored
[ Upstream commit 7303cb5b ] ext4_search_dir() and ext4_generic_delete_entry() can be called both for standard director blocks and for inline directories stored inside inode or inline xattr space. For the second case we didn't call ext4_check_dir_entry() with proper constraints that could result in accepting corrupted directory entry as well as false positive filesystem errors like: EXT4-fs error (device dm-0): ext4_search_dir:1395: inode #28320400: block 113246792: comm dockerd: bad entry in directory: directory entry too close to block end - offset=0, inode=28320403, rec_len=32, name_len=8, size=4096 Fix the arguments passed to ext4_check_dir_entry(). Fixes: 109ba779 ("ext4: check for directory entries too close to block end") CC: stable@vger.kernel.org Signed-off-by:
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Eric Biggers authored
[ Upstream commit d9b9f8d5 ] When ext4 encryption was originally merged, we were encrypting the user-specified filename in ext4_match(), introducing a lot of additional complexity into ext4_match() and its callers. This has since been changed to encrypt the filename earlier, so we can remove the gunk that's no longer needed. This more or less reverts ext4_search_dir() and ext4_find_dest_de() to the way they were in the v4.0 kernel. Signed-off-by:
Eric Biggers <ebiggers@google.com> Signed-off-by:
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Charan Teja Reddy authored
commit 88e8ac11 upstream. The following race is observed with the repeated online, offline and a delay between two successive online of memory blocks of movable zone. P1 P2 Online the first memory block in the movable zone. The pcp struct values are initialized to default values,i.e., pcp->high = 0 & pcp->batch = 1. Allocate the pages from the movable zone. Try to Online the second memory block in the movable zone thus it entered the online_pages() but yet to call zone_pcp_update(). This process is entered into the exit path thus it tries to release the order-0 pages to pcp lists through free_unref_page_commit(). As pcp->high = 0, pcp->count = 1 proceed to call the function free_pcppages_bulk(). Update the pcp values thus the new pcp values are like, say, pcp->high = 378, pcp->batch = 63. Read the pcp's batch value using READ_ONCE() and pass the same to free_pcppages_bulk(), pcp values passed here are, batch = 63, count = 1. Since num of pages in the pcp lists are less than ->batch, then it will stuck in while(list_empty(list)) loop with interrupts disabled thus a core hung. Avoid this by ensuring free_pcppages_bulk() is called with proper count of pcp list pages. The mentioned race is some what easily reproducible without [1] because pcp's are not updated for the first memory block online and thus there is a enough race window for P2 between alloc+free and pcp struct values update through onlining of second memory block. With [1], the race still exists but it is very narrow as we update the pcp struct values for the first memory block online itself. This is not limited to the movable zone, it could also happen in cases with the normal zone (e.g., hotplug to a node that only has DMA memory, or no other memory yet). [1]: https://patchwork.kernel.org/patch/11696389/ Fixes: 5f8dcc21 ("page-allocator: split per-cpu list into one-list-per-migrate-type") Signed-off-by:
Charan Teja Reddy <charante@codeaurora.org> Signed-off-by:
David Hildenbrand <david@redhat.com> Acked-by:
David Rientjes <rientjes@google.com> Acked-by:
Michal Hocko <mhocko@suse.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Vinayak Menon <vinmenon@codeaurora.org> Cc: <stable@vger.kernel.org> [2.6+] Link: http://lkml.kernel.org/r/1597150703-19003-1-git-send-email-charante@codeaurora.orgSigned-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Doug Berger authored
commit e08d3fdf upstream. The lowmem_reserve arrays provide a means of applying pressure against allocations from lower zones that were targeted at higher zones. Its values are a function of the number of pages managed by higher zones and are assigned by a call to the setup_per_zone_lowmem_reserve() function. The function is initially called at boot time by the function init_per_zone_wmark_min() and may be called later by accesses of the /proc/sys/vm/lowmem_reserve_ratio sysctl file. The function init_per_zone_wmark_min() was moved up from a module_init to a core_initcall to resolve a sequencing issue with khugepaged. Unfortunately this created a sequencing issue with CMA page accounting. The CMA pages are added to the managed page count of a zone when cma_init_reserved_areas() is called at boot also as a core_initcall. This makes it uncertain whether the CMA pages will be added to the managed page counts of their zones before or after the call to init_per_zone_wmark_min() as it becomes dependent on link order. With the current link order the pages are added to the managed count after the lowmem_reserve arrays are initialized at boot. This means the lowmem_reserve values at boot may be lower than the values used later if /proc/sys/vm/lowmem_reserve_ratio is accessed even if the ratio values are unchanged. In many cases the difference is not significant, but for example an ARM platform with 1GB of memory and the following memory layout cma: Reserved 256 MiB at 0x0000000030000000 Zone ranges: DMA [mem 0x0000000000000000-0x000000002fffffff] Normal empty HighMem [mem 0x0000000030000000-0x000000003fffffff] would result in 0 lowmem_reserve for the DMA zone. This would allow userspace to deplete the DMA zone easily. Funnily enough $ cat /proc/sys/vm/lowmem_reserve_ratio would fix up the situation because as a side effect it forces setup_per_zone_lowmem_reserve. This commit breaks the link order dependency by invoking init_per_zone_wmark_min() as a postcore_initcall so that the CMA pages have the chance to be properly accounted in their zone(s) and allowing the lowmem_reserve arrays to receive consistent values. Fixes: bc22af74 ("mm: update min_free_kbytes from khugepaged after core initialization") Signed-off-by:
Doug Berger <opendmb@gmail.com> Signed-off-by:
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Wei Yongjun authored
commit 71e84329 upstream. kmemleak report memory leak as follows: unreferenced object 0x607ee4e5f948 (size 8): comm "syz-executor.1", pid 2098, jiffies 4295031601 (age 288.468s) hex dump (first 8 bytes): 00 00 00 00 00 00 00 00 ........ backtrace: relay_open kernel/relay.c:583 [inline] relay_open+0xb6/0x970 kernel/relay.c:563 do_blk_trace_setup+0x4a8/0xb20 kernel/trace/blktrace.c:557 __blk_trace_setup+0xb6/0x150 kernel/trace/blktrace.c:597 blk_trace_ioctl+0x146/0x280 kernel/trace/blktrace.c:738 blkdev_ioctl+0xb2/0x6a0 block/ioctl.c:613 block_ioctl+0xe5/0x120 fs/block_dev.c:1871 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __x64_sys_ioctl+0x170/0x1ce fs/ioctl.c:739 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 'chan->buf' is malloced in relay_open() by alloc_percpu() but not free while destroy the relay channel. Fix it by adding free_percpu() before return from relay_destroy_channel(). Fixes: 017c59c0 ("relay: Use per CPU constructs for the relay channel buffer pointers") Reported-by:
Hulk Robot <hulkci@huawei.com> Signed-off-by:
Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by:
Chris Wilson <chris@chris-wilson.co.uk> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: David Rientjes <rientjes@google.com> Cc: Michel Lespinasse <walken@google.com> Cc: Daniel Axtens <dja@axtens.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Akash Goel <akash.goel@intel.com> Cc: <stable@vger.kernel.org> Link: http://lkml.kernel.org/r/20200817122826.48518-1-weiyongjun1@huawei.comSigned-off-by:
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Jann Horn authored
commit bcf85fce upstream. romfs has a superblock field that limits the size of the filesystem; data beyond that limit is never accessed. romfs_dev_read() fetches a caller-supplied number of bytes from the backing device. It returns 0 on success or an error code on failure; therefore, its API can't represent short reads, it's all-or-nothing. However, when romfs_dev_read() detects that the requested operation would cross the filesystem size limit, it currently silently truncates the requested number of bytes. This e.g. means that when the content of a file with size 0x1000 starts one byte before the filesystem size limit, ->readpage() will only fill a single byte of the supplied page while leaving the rest uninitialized, leaking that uninitialized memory to userspace. Fix it by returning an error code instead of truncating the read when the requested read operation would go beyond the end of the filesystem. Fixes: da4458bd ("NOMMU: Make it possible for RomFS to use MTD devices directly") Signed-off-by:
Jann Horn <jannh@google.com> Signed-off-by:
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Josef Bacik authored
[ Upstream commit 3ef3959b ] Chris Murphy reported a problem where rpm ostree will bind mount a bunch of things for whatever voodoo it's doing. But when it does this /proc/mounts shows something like /dev/sda /mnt/test btrfs rw,relatime,subvolid=256,subvol=/foo 0 0 /dev/sda /mnt/test/baz btrfs rw,relatime,subvolid=256,subvol=/foo/bar 0 0 Despite subvolid=256 being subvol=/foo. This is because we're just spitting out the dentry of the mount point, which in the case of bind mounts is the source path for the mountpoint. Instead we should spit out the path to the actual subvol. Fix this by looking up the name for the subvolid we have mounted. With this fix the same test looks like this /dev/sda /mnt/test btrfs rw,relatime,subvolid=256,subvol=/foo 0 0 /dev/sda /mnt/test/baz btrfs rw,relatime,subvolid=256,subvol=/foo 0 0 Reported-by:
Chris Murphy <chris@colorremedies.com> CC: stable@vger.kernel.org # 4.4+ Signed-off-by:
Josef Bacik <josef@toxicpanda.com> Reviewed-by:
David Sterba <dsterba@suse.com> Signed-off-by:
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Marcos Paulo de Souza authored
[ Upstream commit c0c907a4 ] The functions will be used outside of export.c and super.c to allow resolving subvolume name from a given id, eg. for subvolume deletion by id ioctl. Signed-off-by:
Marcos Paulo de Souza <mpdesouza@suse.com> Reviewed-by:
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Hugh Dickins authored
[ Upstream commit f3f99d63 ] syzbot crashes on the VM_BUG_ON_MM(khugepaged_test_exit(mm), mm) in __khugepaged_enter(): yes, when one thread is about to dump core, has set core_state, and is waiting for others, another might do something calling __khugepaged_enter(), which now crashes because I lumped the core_state test (known as "mmget_still_valid") into khugepaged_test_exit(). I still think it's best to lump them together, so just in this exceptional case, check mm->mm_users directly instead of khugepaged_test_exit(). Fixes: bbe98f9c ("khugepaged: khugepaged_test_exit() check mmget_still_valid()") Reported-by:
syzbot <syzkaller@googlegroups.com> Signed-off-by:
Hugh Dickins <hughd@google.com> Signed-off-by:
Yang Shi <shy828301@gmail.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Song Liu <songliubraving@fb.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Eric Dumazet <edumazet@google.com> Cc: <stable@vger.kernel.org> [4.8+] Link: http://lkml.kernel.org/r/alpine.LSU.2.11.2008141503370.18085@eggly.anvilsSigned-off-by:
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Hugh Dickins authored
[ Upstream commit bbe98f9c ] Move collapse_huge_page()'s mmget_still_valid() check into khugepaged_test_exit() itself. collapse_huge_page() is used for anon THP only, and earned its mmget_still_valid() check because it inserts a huge pmd entry in place of the page table's pmd entry; whereas collapse_file()'s retract_page_tables() or collapse_pte_mapped_thp() merely clears the page table's pmd entry. But core dumping without mmap lock must have been as open to mistaking a racily cleared pmd entry for a page table at physical page 0, as exit_mmap() was. And we certainly have no interest in mapping as a THP once dumping core. Fixes: 59ea6d06 ("coredump: fix race condition between collapse_huge_page() and core dumping") Signed-off-by:
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Kevin Hao authored
[ Upstream commit 96b4833b ] In calculation of the cpu mask for the hwlat kernel thread, the wrong cpu mask is used instead of the tracing_cpumask, this causes the tracing/tracing_cpumask useless for hwlat tracer. Fixes it. Link: https://lkml.kernel.org/r/20200730082318.42584-2-haokexin@gmail.com Cc: Ingo Molnar <mingo@redhat.com> Cc: stable@vger.kernel.org Fixes: 0330f7aa ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs") Signed-off-by:
Kevin Hao <haokexin@gmail.com> Signed-off-by:
Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by:
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Steven Rostedt (VMware) authored
[ Upstream commit f447c196 ] Instead of initializing the affinity of the hwlat kthread in the thread itself, simply set up the initial affinity at thread creation. This simplifies the code. Signed-off-by:
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Masami Hiramatsu authored
[ Upstream commit 12d572e7 ] Fix the memory leakage in debuginfo__find_trace_events() when the probe point is not found in the debuginfo. If there is no probe point found in the debuginfo, debuginfo__find_probes() will NOT return -ENOENT, but 0. Thus the caller of debuginfo__find_probes() must check the tf.ntevs and release the allocated memory for the array of struct probe_trace_event. The current code releases the memory only if the debuginfo__find_probes() hits an error but not checks tf.ntevs. In the result, the memory allocated on *tevs are not released if tf.ntevs == 0. This fixes the memory leakage by checking tf.ntevs == 0 in addition to ret < 0. Fixes: ff741783 ("perf probe: Introduce debuginfo to encapsulate dwarf information") Signed-off-by:
Masami Hiramatsu <mhiramat@kernel.org> Reviewed-by:
Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: stable@vger.kernel.org Link: http://lore.kernel.org/lkml/159438668346.62703.10887420400718492503.stgit@devnote2Signed-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by:
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Liu Ying authored
[ Upstream commit 3b2a9995 ] Both of the two LVDS channels should be disabled for split mode in the encoder's ->disable() callback, because they are enabled in the encoder's ->enable() callback. Fixes: 6556f7f8 ("drm: imx: Move imx-drm driver out of staging") Cc: Philipp Zabel <p.zabel@pengutronix.de> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: Pengutronix Kernel Team <kernel@pengutronix.de> Cc: NXP Linux Team <linux-imx@nxp.com> Cc: <stable@vger.kernel.org> Signed-off-by:
Liu Ying <victor.liu@nxp.com> Signed-off-by:
Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by:
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Jan Beulich authored
commit 22636f8c upstream. Omitting suffixes from instructions in AT&T mode is bad practice when operand size cannot be determined by the assembler from register operands, and is likely going to be warned about by upstream gas in the future (mine does already). Add the missing suffixes here. Note that for 64-bit this means some operations change from being 32-bit to 64-bit. Signed-off-by:
Jan Beulich <jbeulich@suse.com> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/5A93F98702000078001ABACC@prv-mh.provo.novell.comSigned-off-by:
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Uros Bizjak authored
commit 3c52b5c6 upstream. There is no need for \n\t in front of CC_SET(), as the macro already includes these two. Signed-off-by:
Uros Bizjak <ubizjak@gmail.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20170906151808.5634-1-ubizjak@gmail.comSigned-off-by:
Ingo Molnar <mingo@kernel.org> Signed-off-by:
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- 21 Aug, 2020 12 commits
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Greg Kroah-Hartman authored
Tested-by:
Shuah Khan <skhan@linuxfoundation.org> Signed-off-by:
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Oscar Salvador authored
Recently a customer of ours experienced a crash when booting the system while enabling memory-hotplug. The problem is that Normal zones on different nodes don't get their private zone->pageset allocated, and keep sharing the initial boot_pageset. The sharing between zones is normally safe as explained by the comment for boot_pageset - it's a percpu structure, and manipulations are done with disabled interrupts, and boot_pageset is set up in a way that any page placed on its pcplist is immediately flushed to shared zone's freelist, because pcp->high == 1. However, the hotplug operation updates pcp->high to a higher value as it expects to be operating on a private pageset. The problem is in build_all_zonelists(), which is called when the first range of pages is onlined for the Normal zone of node X or Y: if (system_state == SYSTEM_BOOTING) { build_all_zonelists_init(); } else { #ifdef CONFIG_MEMORY_HOTPLUG if (zone) setup_zone_pageset(zone); #endif /* we have to stop all cpus to guarantee there is no user of zonelist */ stop_machine(__build_all_zonelists, pgdat, NULL); /* cpuset refresh routine should be here */ } When called during hotplug, it should execute the setup_zone_pageset(zone) which allocates the private pageset. However, with memhp_default_state=online, this happens early while system_state == SYSTEM_BOOTING is still true, hence this step is skipped. (and build_all_zonelists_init() is probably unsafe anyway at this point). Another hotplug operation on the same zone then leads to zone_pcp_update(zone) called from online_pages(), which updates the pcp->high for the shared boot_pageset to a value higher than 1. At that point, pages freed from Node X and Y Normal zones can end up on the same pcplist and from there they can be freed to the wrong zone's freelist, leading to the corruption and crashes. Please, note that upstream has fixed that differently (and unintentionally) by adding another boot state (SYSTEM_SCHEDULING), which is set before smp_init(). That should happen before memory hotplug events even with memhp_default_state=online. Backporting that would be too intrusive. Signed-off-by:Oscar Salvador <osalvador@suse.de> Debugged-by:
Vlastimil Babka <vbabka@suse.cz> Acked-by: Michal Hocko <mhocko@suse.com> # for stable trees Signed-off-by:
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Hugh Dickins authored
commit 18e77600 upstream. Only once have I seen this scenario (and forgot even to notice what forced the eventual crash): a sequence of "BUG: Bad page map" alerts from vm_normal_page(), from zap_pte_range() servicing exit_mmap(); pmd:00000000, pte values corresponding to data in physical page 0. The pte mappings being zapped in this case were supposed to be from a huge page of ext4 text (but could as well have been shmem): my belief is that it was racing with collapse_file()'s retract_page_tables(), found *pmd pointing to a page table, locked it, but *pmd had become 0 by the time start_pte was decided. In most cases, that possibility is excluded by holding mmap lock; but exit_mmap() proceeds without mmap lock. Most of what's run by khugepaged checks khugepaged_test_exit() after acquiring mmap lock: khugepaged_collapse_pte_mapped_thps() and hugepage_vma_revalidate() do so, for example. But retract_page_tables() did not: fix that. The fix is for retract_page_tables() to check khugepaged_test_exit(), after acquiring mmap lock, before doing anything to the page table. Getting the mmap lock serializes with __mmput(), which briefly takes and drops it in __khugepaged_exit(); then the khugepaged_test_exit() check on mm_users makes sure we don't touch the page table once exit_mmap() might reach it, since exit_mmap() will be proceeding without mmap lock, not expecting anyone to be racing with it. Fixes: f3f0e1d2 ("khugepaged: add support of collapse for tmpfs/shmem pages") Signed-off-by:
Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Song Liu <songliubraving@fb.com> Cc: <stable@vger.kernel.org> [4.8+] Link: http://lkml.kernel.org/r/alpine.LSU.2.11.2008021215400.27773@eggly.anvilsSigned-off-by:
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Geert Uytterhoeven authored
[ Upstream commit 0c64a0dc ] The Landisk setup code maps the CF IDE area using ioremap_prot(), and passes the resulting virtual addresses to the pata_platform driver, disguising them as I/O port addresses. Hence the pata_platform driver translates them again using ioport_map(). As CONFIG_GENERIC_IOMAP=n, and CONFIG_HAS_IOPORT_MAP=y, the SuperH-specific mapping code in arch/sh/kernel/ioport.c translates I/O port addresses to virtual addresses by adding sh_io_port_base, which defaults to -1, thus breaking the assumption of an identity mapping. Fix this by setting sh_io_port_base to zero. Fixes: 37b7a978 ("sh: machvec IO death.") Signed-off-by:
Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by:
Rich Felker <dalias@libc.org> Signed-off-by:
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Dinghao Liu authored
[ Upstream commit 5a25de6d ] Freeing chip on error may lead to an Oops at the next time the system goes to resume. Fix this by removing all snd_echo_free() calls on error. Fixes: 47b5d028 ("ALSA: Echoaudio - Add suspend support #2") Signed-off-by:
Dinghao Liu <dinghao.liu@zju.edu.cn> Link: https://lore.kernel.org/r/20200813074632.17022-1-dinghao.liu@zju.edu.cnSigned-off-by:
Takashi Iwai <tiwai@suse.de> Signed-off-by:
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Andy Shevchenko authored
[ Upstream commit 3d858942 ] The event handler loop must be run with interrupts disabled. Otherwise we will have a warning: [ 1970.785649] irq 31 handler lineevent_irq_handler+0x0/0x20 enabled interrupts [ 1970.792739] WARNING: CPU: 0 PID: 0 at kernel/irq/handle.c:159 __handle_irq_event_percpu+0x162/0x170 [ 1970.860732] RIP: 0010:__handle_irq_event_percpu+0x162/0x170 ... [ 1970.946994] Call Trace: [ 1970.949446] <IRQ> [ 1970.951471] handle_irq_event_percpu+0x2c/0x80 [ 1970.955921] handle_irq_event+0x23/0x43 [ 1970.959766] handle_simple_irq+0x57/0x70 [ 1970.963695] generic_handle_irq+0x42/0x50 [ 1970.967717] dln2_rx+0xc1/0x210 [dln2] [ 1970.971479] ? usb_hcd_unmap_urb_for_dma+0xa6/0x1c0 [ 1970.976362] __usb_hcd_giveback_urb+0x77/0xe0 [ 1970.980727] usb_giveback_urb_bh+0x8e/0xe0 [ 1970.984837] tasklet_action_common.isra.0+0x4a/0xe0 ... Recently xHCI driver switched to tasklets in the commit 36dc0165 ("usb: host: xhci: Support running urb giveback in tasklet context"). The handle_irq_event_* functions are expected to be called with interrupts disabled and they rightfully complain here because we run in tasklet context with interrupts enabled. Use a event spinlock to protect event handler from being interrupted. Note, that there are only two users of this GPIO and ADC drivers and both of them are using generic_handle_irq() which makes above happen. Fixes: 338a1281 ("mfd: Add support for Diolan DLN-2 devices") Signed-off-by:
Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by:
Lee Jones <lee.jones@linaro.org> Signed-off-by:
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Colin Ian King authored
[ Upstream commit 88b2e9b0 ] The 64 bit ino is being compared to the product of two u32 values, however, the multiplication is being performed using a 32 bit multiply so there is a potential of an overflow. To be fully safe, cast uspi->s_ncg to a u64 to ensure a 64 bit multiplication occurs to avoid any chance of overflow. Fixes: f3e2a520 ("ufs: NFS support") Signed-off-by:
Colin Ian King <colin.king@canonical.com> Signed-off-by:
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Jeffrey Mitchell authored
[ Upstream commit b4487b93 ] Move the buffer size check to decode_attr_security_label() before memcpy() Only call memcpy() if the buffer is large enough Fixes: aa9c2669 ("NFS: Client implementation of Labeled-NFS") Signed-off-by:
Jeffrey Mitchell <jeffrey.mitchell@starlab.io> [Trond: clean up duplicate test of label->len != 0] Signed-off-by:
Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by:
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Wang Hai authored
[ Upstream commit 50caa777 ] Fix the missing clk_disable_unprepare() before return from emac_clks_phase1_init() in the error handling case. Fixes: b9b17deb ("net: emac: emac gigabit ethernet controller driver") Reported-by:
Wang Hai <wanghai38@huawei.com> Acked-by:
Timur Tabi <timur@kernel.org> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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Dan Carpenter authored
[ Upstream commit 4437c115 ] These if statements are supposed to be true if we ended the list_for_each_entry() loops without hitting a break statement but they don't work. In the first loop, we increment "i" after the "if (i == unit)" condition so we don't necessarily know that "i" is not equal to unit at the end of the loop. In the second loop we exit when mode is not pointing to a valid drm_display_mode struct so it doesn't make sense to check "mode->type". Fixes: a278724a ("drm/vmwgfx: Implement fbdev on kms v2") Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by:
Roland Scheidegger <sroland@vmware.com> Signed-off-by:
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Colin Ian King authored
[ Upstream commit ea38f06e ] Currently when the call to fsp_reg_write fails -EIO is not being returned because the count is being returned instead of the return value in retval. Fix this by returning the value in retval instead of count. Addresses-Coverity: ("Unused value") Fixes: fc69f4a6 ("Input: add new driver for Sentelic Finger Sensing Pad") Signed-off-by:
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Rayagonda Kokatanur authored
[ Upstream commit 6ced5ff0 ] Handle clk_get_rate() returning 0 to avoid possible division by zero. Fixes: daa5abc4 ("pwm: Add support for Broadcom iProc PWM controller") Signed-off-by:
Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com> Signed-off-by:
Scott Branden <scott.branden@broadcom.com> Reviewed-by:
Ray Jui <ray.jui@broadcom.com> Reviewed-by:
Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by:
Thierry Reding <thierry.reding@gmail.com> Signed-off-by:
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