- 20 Jan, 2017 40 commits
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John Garry authored
BugLink: http://bugs.launchpad.net/bugs/1658091 commit 6f724fb3 upstream. In of_i2c_register_device(), when the check for device address validity fails we print the info.addr, which has not been assigned properly. Fix this by printing the actual invalid address. Signed-off-by:
John Garry <john.garry@huawei.com> Reviewed-by:
Vladimir Zapolskiy <vz@mleia.com> Signed-off-by:
Wolfram Sang <wsa@the-dreams.de> Fixes: b4e2f6ac ("i2c: apply DT flags when probing") Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by:
Tim Gardner <tim.gardner@canonical.com> Signed-off-by:
Luis Henriques <luis.henriques@canonical.com>
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Guenter Roeck authored
BugLink: http://bugs.launchpad.net/bugs/1658091 commit 1c3415a0 upstream. The following crash may be seen if bad data is received from the touchscreen. [ 2189.425150] elants_i2c i2c-ELAN0001:00: unknown packet ff ff ff ff [ 2189.430738] divide error: 0000 [#1] PREEMPT SMP [ 2189.434679] gsmi: Log Shutdown Reason 0x03 [ 2189.434689] Modules linked in: ip6t_REJECT nf_reject_ipv6 rfcomm evdi uinput uvcvideo cmac videobuf2_vmalloc videobuf2_memops snd_hda_codec_hdmi i2c_dev videobuf2_core snd_soc_sst_cht_bsw_rt5645 snd_hda_intel snd_intel_sst_acpi btusb btrtl btbcm btintel bluetooth snd_soc_sst_acpi snd_hda_codec snd_intel_sst_core snd_hwdep snd_soc_sst_mfld_platform snd_hda_core snd_soc_rt5645 memconsole_x86_legacy memconsole zram snd_soc_rl6231 fuse ip6table_filter iwlmvm iwlwifi iwl7000_mac80211 cfg80211 iio_trig_sysfs joydev cros_ec_sensors cros_ec_sensors_core industrialio_triggered_buffer kfifo_buf industrialio snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device ppp_async ppp_generic slhc tun [ 2189.434866] CPU: 0 PID: 106 Comm: irq/184-ELAN000 Tainted: G W 3.18.0-13101-g57e8190 #1 [ 2189.434883] Hardware name: GOOGLE Ultima, BIOS Google_Ultima.7287.131.43 07/20/2016 [ 2189.434898] task: ffff88017a0b6d80 ti: ffff88017a2bc000 task.ti: ffff88017a2bc000 [ 2189.434913] RIP: 0010:[<ffffffffbecc48d5>] [<ffffffffbecc48d5>] elants_i2c_irq+0x190/0x200 [ 2189.434937] RSP: 0018:ffff88017a2bfd98 EFLAGS: 00010293 [ 2189.434948] RAX: 0000000000000000 RBX: ffff88017a967828 RCX: ffff88017a9678e8 [ 2189.434962] RDX: 0000000000000000 RSI: 0000000000000246 RDI: 0000000000000000 [ 2189.434975] RBP: ffff88017a2bfdd8 R08: 00000000000003e8 R09: 0000000000000000 [ 2189.434989] R10: 0000000000000000 R11: 000000000044a2bd R12: ffff88017a991800 [ 2189.435001] R13: ffffffffbe8a2a53 R14: ffff88017a0b6d80 R15: ffff88017a0b6d80 [ 2189.435011] FS: 0000000000000000(0000) GS:ffff88017fc00000(0000) knlGS:0000000000000000 [ 2189.435022] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 2189.435030] CR2: 00007f678d94b000 CR3: 000000003f41a000 CR4: 00000000001007f0 [ 2189.435039] Stack: [ 2189.435044] ffff88017a2bfda8 ffff88017a9678e8 646464647a2bfdd8 0000000006e09574 [ 2189.435060] 0000000000000000 ffff88017a088b80 ffff88017a921000 ffffffffbe8a2a53 [ 2189.435074] ffff88017a2bfe08 ffffffffbe8a2a73 ffff88017a0b6d80 0000000006e09574 [ 2189.435089] Call Trace: [ 2189.435101] [<ffffffffbe8a2a53>] ? irq_thread_dtor+0xa9/0xa9 [ 2189.435112] [<ffffffffbe8a2a73>] irq_thread_fn+0x20/0x40 [ 2189.435123] [<ffffffffbe8a2be1>] irq_thread+0x14e/0x222 [ 2189.435135] [<ffffffffbee8cbeb>] ? __schedule+0x3b3/0x57a [ 2189.435145] [<ffffffffbe8a29aa>] ? wake_threads_waitq+0x2d/0x2d [ 2189.435156] [<ffffffffbe8a2a93>] ? irq_thread_fn+0x40/0x40 [ 2189.435168] [<ffffffffbe87c385>] kthread+0x10e/0x116 [ 2189.435178] [<ffffffffbe87c277>] ? __kthread_parkme+0x67/0x67 [ 2189.435189] [<ffffffffbee900ac>] ret_from_fork+0x7c/0xb0 [ 2189.435199] [<ffffffffbe87c277>] ? __kthread_parkme+0x67/0x67 [ 2189.435208] Code: ff ff eb 73 0f b6 bb c1 00 00 00 83 ff 03 7e 13 49 8d 7c 24 20 ba 04 00 00 00 48 c7 c6 8a cd 21 bf eb 4d 0f b6 83 c2 00 00 00 99 <f7> ff 83 f8 37 75 15 48 6b f7 37 4c 8d a3 c4 00 00 00 4c 8d ac [ 2189.435312] RIP [<ffffffffbecc48d5>] elants_i2c_irq+0x190/0x200 [ 2189.435323] RSP <ffff88017a2bfd98> [ 2189.435350] ---[ end trace f4945345a75d96dd ]--- [ 2189.443841] Kernel panic - not syncing: Fatal exception [ 2189.444307] Kernel Offset: 0x3d800000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 2189.444519] gsmi: Log Shutdown Reason 0x02 The problem was seen with a 3.18 based kernel, but there is no reason to believe that the upstream code is safe. Fixes: 66aee900 ("Input: add support for Elan eKTH I2C touchscreens") Signed-off-by:
Guenter Roeck <linux@roeck-us.net> Signed-off-by:
Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by:
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Johan Hovold authored
BugLink: http://bugs.launchpad.net/bugs/1658091 commit a20047f3 upstream. The private baud_rate variable is used to configure the port at open and reset-resume and must never be set to (and left at) zero or reset-resume and all further open attempts will fail. Fixes: aa91def4 ("USB: ch341: set tty baud speed according to tty struct") Fixes: 664d5df9 ("USB: usb-serial ch341: support for DTR/RTS/CTS") Signed-off-by:
Johan Hovold <johan@kernel.org> Signed-off-by:
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Johan Hovold authored
BugLink: http://bugs.launchpad.net/bugs/1658091 commit 2d5a9c72 upstream. A short control transfer would currently fail to be detected, something which could lead to stale buffer data being used as valid input. Check for short transfers, and make sure to log any transfer errors. Note that this also avoids leaking heap data to user space (TIOCMGET) and the remote device (break control). Fixes: 6ce76104 ("USB: Driver for CH341 USB-serial adaptor") Signed-off-by:
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Johan Hovold authored
BugLink: http://bugs.launchpad.net/bugs/1658091 commit f2950b78 upstream. Make sure to stop the interrupt URB before returning on errors during open. Fixes: 664d5df9 ("USB: usb-serial ch341: support for DTR/RTS/CTS") Signed-off-by:
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Johan Hovold authored
BugLink: http://bugs.launchpad.net/bugs/1658091 commit 4e2da446 upstream. DTR and RTS will be asserted by the tty-layer when the port is opened and deasserted on close (if HUPCL is set). Make sure the initial state is not-asserted before the port is first opened as well. Fixes: 664d5df9 ("USB: usb-serial ch341: support for DTR/RTS/CTS") Signed-off-by:
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Johan Hovold authored
BugLink: http://bugs.launchpad.net/bugs/1658091 commit 146cc8a1 upstream. The current implementation failed to detect short transfers when attempting to read the line state, and also, to make things worse, logged the content of the uninitialised heap transfer buffer. Fixes: abf492e7 ("USB: kl5kusb105: fix DMA buffers on stack") Fixes: 1da177e4 ("Linux-2.6.12-rc2") Reviewed-by:
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Johannes Berg authored
BugLink: http://bugs.launchpad.net/bugs/1658091 commit 753aacfd upstream. A single netlink socket might own multiple interfaces *and* a scheduled scan request (which might belong to another interface), so when it goes away both may need to be destroyed. Remove the schedule_scan_stop indirection to fix this - it's only needed for interface destruction because of the way this works right now, with a single work taking care of all interfaces. Fixes: 93a1e86c ("nl80211: Stop scheduled scan if netlink client disappears") Signed-off-by:
Johannes Berg <johannes.berg@intel.com> Signed-off-by:
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Steve Rutherford authored
BugLink: http://bugs.launchpad.net/bugs/1658091 commit 129a72a0 upstream. Introduces segemented_write_std. Switches from emulated reads/writes to standard read/writes in fxsave, fxrstor, sgdt, and sidt. This fixes CVE-2017-2584, a longstanding kernel memory leak. Since commit 283c95d0 ("KVM: x86: emulate FXSAVE and FXRSTOR", 2016-11-09), which is luckily not yet in any final release, this would also be an exploitable kernel memory *write*! Reported-by:
Dmitry Vyukov <dvyukov@google.com> Fixes: 96051572 Fixes: 283c95d0Suggested-by:
Paolo Bonzini <pbonzini@redhat.com> Signed-off-by:
Steve Rutherford <srutherford@google.com> Signed-off-by:
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Radim Krčmář authored
BugLink: http://bugs.launchpad.net/bugs/1658091 commit 283c95d0 upstream. Internal errors were reported on 16 bit fxsave and fxrstor with ipxe. Old Intels don't have unrestricted_guest, so we have to emulate them. The patch takes advantage of the hardware implementation. AMD and Intel differ in saving and restoring other fields in first 32 bytes. A test wrote 0xff to the fxsave area, 0 to upper bits of MCSXR in the fxsave area, executed fxrstor, rewrote the fxsave area to 0xee, and executed fxsave: Intel (Nehalem): 7f 1f 7f 7f ff 00 ff 07 ff ff ff ff ff ff 00 00 ff ff ff ff ff ff 00 00 ff ff 00 00 ff ff 00 00 Intel (Haswell -- deprecated FPU CS and FPU DS): 7f 1f 7f 7f ff 00 ff 07 ff ff ff ff 00 00 00 00 ff ff ff ff 00 00 00 00 ff ff 00 00 ff ff 00 00 AMD (Opteron 2300-series): 7f 1f 7f 7f ff 00 ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ff ff 00 00 ff ff 02 00 fxsave/fxrstor will only be emulated on early Intels, so KVM can't do much to improve the situation. Signed-off-by:
Radim Krčmář <rkrcmar@redhat.com> Signed-off-by:
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Radim Krčmář authored
BugLink: http://bugs.launchpad.net/bugs/1658091 commit aabba3c6 upstream. Move the existing exception handling for inline assembly into a macro and switch its return values to X86EMUL type. Signed-off-by:
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Radim Krčmář authored
BugLink: http://bugs.launchpad.net/bugs/1658091 commit d3fe959f upstream. Needed for FXSAVE and FXRSTOR. Signed-off-by:
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David Matlack authored
BugLink: http://bugs.launchpad.net/bugs/1658091 commit cef84c30 upstream. KVM's lapic emulation uses static_key_deferred (apic_{hw,sw}_disabled). These are implemented with delayed_work structs which can still be pending when the KVM module is unloaded. We've seen this cause kernel panics when the kvm_intel module is quickly reloaded. Use the new static_key_deferred_flush() API to flush pending updates on module unload. Signed-off-by:
David Matlack <dmatlack@google.com> Signed-off-by:
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David Matlack authored
BugLink: http://bugs.launchpad.net/bugs/1658091 commit b6416e61 upstream. Modules that use static_key_deferred need a way to synchronize with any delayed work that is still pending when the module is unloaded. Introduce static_key_deferred_flush() which flushes any pending jump label updates. Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by:
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Wanpeng Li authored
BugLink: http://bugs.launchpad.net/bugs/1658091 commit 4f3dbdf4 upstream. Reported syzkaller: BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 IP: irq_bypass_unregister_consumer+0x9d/0xb70 [irqbypass] PGD 0 Oops: 0002 [#1] SMP CPU: 1 PID: 125 Comm: kworker/1:1 Not tainted 4.9.0+ #1 Workqueue: kvm-irqfd-cleanup irqfd_shutdown [kvm] task: ffff9bbe0dfbb900 task.stack: ffffb61802014000 RIP: 0010:irq_bypass_unregister_consumer+0x9d/0xb70 [irqbypass] Call Trace: irqfd_shutdown+0x66/0xa0 [kvm] process_one_work+0x16b/0x480 worker_thread+0x4b/0x500 kthread+0x101/0x140 ? process_one_work+0x480/0x480 ? kthread_create_on_node+0x60/0x60 ret_from_fork+0x25/0x30 RIP: irq_bypass_unregister_consumer+0x9d/0xb70 [irqbypass] RSP: ffffb61802017e20 CR2: 0000000000000008 The syzkaller folks reported a NULL pointer dereference that due to unregister an consumer which fails registration before. The syzkaller creates two VMs w/ an equal eventfd occasionally. So the second VM fails to register an irqbypass consumer. It will make irqfd as inactive and queue an workqueue work to shutdown irqfd and unregister the irqbypass consumer when eventfd is closed. However, the second consumer has been initialized though it fails registration. So the token(same as the first VM's) is taken to unregister the consumer through the workqueue, the consumer of the first VM is found and unregistered, then NULL deref incurred in the path of deleting consumer from the consumers list. This patch fixes it by making irq_bypass_register/unregister_consumer() looks for the consumer entry based on consumer pointer itself instead of token matching. Reported-by:
Alex Williamson <alex.williamson@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Alex Williamson <alex.williamson@redhat.com> Signed-off-by:
Wanpeng Li <wanpeng.li@hotmail.com> Signed-off-by:
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Paolo Bonzini authored
BugLink: http://bugs.launchpad.net/bugs/1658091 commit 33ab9110 upstream. This is CVE-2017-2583. On Intel this causes a failed vmentry because SS's type is neither 3 nor 7 (even though the manual says this check is only done for usable SS, and the dmesg splat says that SS is unusable!). On AMD it's worse: svm.c is confused and sets CPL to 0 in the vmcb. The fix fabricates a data segment descriptor when SS is set to a null selector, so that CPL and SS.DPL are set correctly in the VMCS/vmcb. Furthermore, only allow setting SS to a NULL selector if SS.RPL < 3; this in turn ensures CPL < 3 because RPL must be equal to CPL. Thanks to Andy Lutomirski and Willy Tarreau for help in analyzing the bug and deciphering the manuals. Reported-by:
Xiaohan Zhang <zhangxiaohan1@huawei.com> Fixes: 79d5b4c3Signed-off-by:
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Mike Kravetz authored
BugLink: http://bugs.launchpad.net/bugs/1658091 commit e5bbc8a6 upstream. return_unused_surplus_pages() decrements the global reservation count, and frees any unused surplus pages that were backing the reservation. Commit 7848a4bf ("mm/hugetlb.c: add cond_resched_lock() in return_unused_surplus_pages()") added a call to cond_resched_lock in the loop freeing the pages. As a result, the hugetlb_lock could be dropped, and someone else could use the pages that will be freed in subsequent iterations of the loop. This could result in inconsistent global hugetlb page state, application api failures (such as mmap) failures or application crashes. When dropping the lock in return_unused_surplus_pages, make sure that the global reservation count (resv_huge_pages) remains sufficiently large to prevent someone else from claiming pages about to be freed. Analyzed by Paul Cassella. Fixes: 7848a4bf ("mm/hugetlb.c: add cond_resched_lock() in return_unused_surplus_pages()") Link: http://lkml.kernel.org/r/1483991767-6879-1-git-send-email-mike.kravetz@oracle.comSigned-off-by:
Mike Kravetz <mike.kravetz@oracle.com> Reported-by:
Paul Cassella <cassella@cray.com> Suggested-by:
Michal Hocko <mhocko@kernel.org> Cc: Masayoshi Mizuma <m.mizuma@jp.fujitsu.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Aneesh Kumar <aneesh.kumar@linux.vnet.ibm.com> Cc: Hillf Danton <hillf.zj@alibaba-inc.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
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Eric Ren authored
BugLink: http://bugs.launchpad.net/bugs/1658091 commit e7ee2c08 upstream. The crash happens rather often when we reset some cluster nodes while nodes contend fiercely to do truncate and append. The crash backtrace is below: dlm: C21CBDA5E0774F4BA5A9D4F317717495: dlm_recover_grant 1 locks on 971 resources dlm: C21CBDA5E0774F4BA5A9D4F317717495: dlm_recover 9 generation 5 done: 4 ms ocfs2: Begin replay journal (node 318952601, slot 2) on device (253,18) ocfs2: End replay journal (node 318952601, slot 2) on device (253,18) ocfs2: Beginning quota recovery on device (253,18) for slot 2 ocfs2: Finishing quota recovery on device (253,18) for slot 2 (truncate,30154,1):ocfs2_truncate_file:470 ERROR: bug expression: le64_to_cpu(fe->i_size) != i_size_read(inode) (truncate,30154,1):ocfs2_truncate_file:470 ERROR: Inode 290321, inode i_size = 732 != di i_size = 937, i_flags = 0x1 ------------[ cut here ]------------ kernel BUG at /usr/src/linux/fs/ocfs2/file.c:470! invalid opcode: 0000 [#1] SMP Modules linked in: ocfs2_stack_user(OEN) ocfs2(OEN) ocfs2_nodemanager ocfs2_stackglue(OEN) quota_tree dlm(OEN) configfs fuse sd_mod iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi af_packet iscsi_ibft iscsi_boot_sysfs softdog xfs libcrc32c ppdev parport_pc pcspkr parport joydev virtio_balloon virtio_net i2c_piix4 acpi_cpufreq button processor ext4 crc16 jbd2 mbcache ata_generic cirrus virtio_blk ata_piix drm_kms_helper ahci syscopyarea libahci sysfillrect sysimgblt fb_sys_fops ttm floppy libata drm virtio_pci virtio_ring uhci_hcd virtio ehci_hcd usbcore serio_raw usb_common sg dm_multipath dm_mod scsi_dh_rdac scsi_dh_emc scsi_dh_alua scsi_mod autofs4 Supported: No, Unsupported modules are loaded CPU: 1 PID: 30154 Comm: truncate Tainted: G OE N 4.4.21-69-default #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.8.1-0-g4adadbd-20151112_172657-sheep25 04/01/2014 task: ffff88004ff6d240 ti: ffff880074e68000 task.ti: ffff880074e68000 RIP: 0010:[<ffffffffa05c8c30>] [<ffffffffa05c8c30>] ocfs2_truncate_file+0x640/0x6c0 [ocfs2] RSP: 0018:ffff880074e6bd50 EFLAGS: 00010282 RAX: 0000000000000074 RBX: 000000000000029e RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000246 RDI: 0000000000000246 RBP: ffff880074e6bda8 R08: 000000003675dc7a R09: ffffffff82013414 R10: 0000000000034c50 R11: 0000000000000000 R12: ffff88003aab3448 R13: 00000000000002dc R14: 0000000000046e11 R15: 0000000000000020 FS: 00007f839f965700(0000) GS:ffff88007fc80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 00007f839f97e000 CR3: 0000000036723000 CR4: 00000000000006e0 Call Trace: ocfs2_setattr+0x698/0xa90 [ocfs2] notify_change+0x1ae/0x380 do_truncate+0x5e/0x90 do_sys_ftruncate.constprop.11+0x108/0x160 entry_SYSCALL_64_fastpath+0x12/0x6d Code: 24 28 ba d6 01 00 00 48 c7 c6 30 43 62 a0 8b 41 2c 89 44 24 08 48 8b 41 20 48 c7 c1 78 a3 62 a0 48 89 04 24 31 c0 e8 a0 97 f9 ff <0f> 0b 3d 00 fe ff ff 0f 84 ab fd ff ff 83 f8 fc 0f 84 a2 fd ff RIP [<ffffffffa05c8c30>] ocfs2_truncate_file+0x640/0x6c0 [ocfs2] It's because ocfs2_inode_lock() get us stale LVB in which the i_size is not equal to the disk i_size. We mistakenly trust the LVB because the underlaying fsdlm dlm_lock() doesn't set lkb_sbflags with DLM_SBF_VALNOTVALID properly for us. But, why? The current code tries to downconvert lock without DLM_LKF_VALBLK flag to tell o2cb don't update RSB's LVB if it's a PR->NULL conversion, even if the lock resource type needs LVB. This is not the right way for fsdlm. The fsdlm plugin behaves different on DLM_LKF_VALBLK, it depends on DLM_LKF_VALBLK to decide if we care about the LVB in the LKB. If DLM_LKF_VALBLK is not set, fsdlm will skip recovering RSB's LVB from this lkb and set the right DLM_SBF_VALNOTVALID appropriately when node failure happens. The following diagram briefly illustrates how this crash happens: RSB1 is inode metadata lock resource with LOCK_TYPE_USES_LVB; The 1st round: Node1 Node2 RSB1: PR RSB1(master): NULL->EX ocfs2_downconvert_lock(PR->NULL, set_lvb==0) ocfs2_dlm_lock(no DLM_LKF_VALBLK) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - dlm_lock(no DLM_LKF_VALBLK) convert_lock(overwrite lkb->lkb_exflags with no DLM_LKF_VALBLK) RSB1: NULL RSB1: EX reset Node2 dlm_recover_rsbs() recover_lvb() /* The LVB is not trustable if the node with EX fails and * no lock >= PR is left. We should set RSB_VALNOTVALID for RSB1. */ if(!(kb_exflags & DLM_LKF_VALBLK)) /* This means we miss the chance to return; * to invalid the LVB here. */ The 2nd round: Node 1 Node2 RSB1(become master from recovery) ocfs2_setattr() ocfs2_inode_lock(NULL->EX) /* dlm_lock() return the stale lvb without setting DLM_SBF_VALNOTVALID */ ocfs2_meta_lvb_is_trustable() return 1 /* so we don't refresh inode from disk */ ocfs2_truncate_file() mlog_bug_on_msg(disk isize != i_size_read(inode)) /* crash! */ The fix is quite straightforward. We keep to set DLM_LKF_VALBLK flag for dlm_lock() if the lock resource type needs LVB and the fsdlm plugin is uesed. Link: http://lkml.kernel.org/r/1481275846-6604-1-git-send-email-zren@suse.comSigned-off-by:
Eric Ren <zren@suse.com> Reviewed-by:
Joseph Qi <jiangqi903@gmail.com> Cc: Mark Fasheh <mfasheh@versity.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Signed-off-by:
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Dan Williams authored
BugLink: http://bugs.launchpad.net/bugs/1658091 commit f931ab47 upstream. Both arch_add_memory() and arch_remove_memory() expect a single threaded context. For example, arch/x86/mm/init_64.c::kernel_physical_mapping_init() does not hold any locks over this check and branch: if (pgd_val(*pgd)) { pud = (pud_t *)pgd_page_vaddr(*pgd); paddr_last = phys_pud_init(pud, __pa(vaddr), __pa(vaddr_end), page_size_mask); continue; } pud = alloc_low_page(); paddr_last = phys_pud_init(pud, __pa(vaddr), __pa(vaddr_end), page_size_mask); The result is that two threads calling devm_memremap_pages() simultaneously can end up colliding on pgd initialization. This leads to crash signatures like the following where the loser of the race initializes the wrong pgd entry: BUG: unable to handle kernel paging request at ffff888ebfff0000 IP: memcpy_erms+0x6/0x10 PGD 2f8e8fc067 PUD 0 /* <---- Invalid PUD */ Oops: 0000 [#1] SMP DEBUG_PAGEALLOC CPU: 54 PID: 3818 Comm: systemd-udevd Not tainted 4.6.7+ #13 task: ffff882fac290040 ti: ffff882f887a4000 task.ti: ffff882f887a4000 RIP: memcpy_erms+0x6/0x10 [..] Call Trace: ? pmem_do_bvec+0x205/0x370 [nd_pmem] ? blk_queue_enter+0x3a/0x280 pmem_rw_page+0x38/0x80 [nd_pmem] bdev_read_page+0x84/0xb0 Hold the standard memory hotplug mutex over calls to arch_{add,remove}_memory(). Fixes: 41e94a85 ("add devm_memremap_pages") Link: http://lkml.kernel.org/r/148357647831.9498.12606007370121652979.stgit@dwillia2-desk3.amr.corp.intel.comSigned-off-by:
Dan Williams <dan.j.williams@intel.com> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by:
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Rolf Eike Beer authored
BugLink: http://bugs.launchpad.net/bugs/1658091 commit a2b1e8a2 upstream. Nothing in this minimal script seems to require bash. We often run these tests on embedded devices where the only shell available is the busybox ash. Use sh instead. Signed-off-by:
Rolf Eike Beer <eb@emlix.com> Signed-off-by:
Shuah Khan <shuahkh@osg.samsung.com> Signed-off-by:
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Rolf Eike Beer authored
BugLink: http://bugs.launchpad.net/bugs/1658091 commit 3659f98b upstream. Nothing in this minimal script seems to require bash. We often run these tests on embedded devices where the only shell available is the busybox ash. Use sh instead. Signed-off-by:
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Marcos Paulo de Souza authored
BugLink: http://bugs.launchpad.net/bugs/1658091 commit 41c567a5 upstream. Avoid AUX loopback in Pegatron C15B touchpad, so input subsystem is able to recognize a Synaptics touchpad in the AUX port. Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=93791 (Touchpad is not detected on DNS 0801480 notebook (PEGATRON C15B)) Suggested-by:
Marcos Paulo de Souza <marcos.souza.org@gmail.com> Signed-off-by:
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Pavel Rojtberg authored
BugLink: http://bugs.launchpad.net/bugs/1658091 commit b6fc513d upstream. currently the controllers get the same product id as the wireless receiver. However the controllers actually have their own product id. The patch makes the driver expose the same product id as the windows driver. This improves compatibility when running applications with WINE. see https://github.com/paroj/xpad/issues/54Signed-off-by:
Pavel Rojtberg <rojtberg@gmail.com> Signed-off-by:
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Luis Henriques authored
BugLink: http://bugs.launchpad.net/bugs/1657674Signed-off-by:
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Shrirang Bagul authored
BugLink: http://bugs.launchpad.net/bugs/1657674 Dell Caracalla IoT gateways sport an RT5660 codec with HID 10EC3277. This patch adds the machine driver required to support RT5660 codec on Baytrail based systems. Signed-off-by:
Shrirang Bagul <shrirang.bagul@canonical.com> Acked-by:
Brad Figg <brad.figg@canonical.com> Signed-off-by:
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Shrirang Bagul authored
BugLink: http://bugs.launchpad.net/bugs/1657674 On Dell IoT Gateways, RT5660 codec is available with ACPI ID 10EC3277. Also, GPIO's are only available by index, so we register mappings to allow machine drivers to access them by name. Signed-off-by:
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Pierre-Louis Bossart authored
BugLink: http://bugs.launchpad.net/bugs/1657674 The upstreamed code modified the control names from Mute to Switch without changing the logic. To get audio working the Switch needs to be off which isn't aligned with normal ALSA conventions. Inverting the logic now so that Switch Off means mute and Switch On means active audio using the specific volume setting. Signed-off-by:
Sebastien Guiriec <sebastien.guiriec@intel.com> Signed-off-by:
Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by:
Mark Brown <broonie@kernel.org> (cherry picked from commit 940a5a01) Signed-off-by:
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Bard Liao authored
BugLink: http://bugs.launchpad.net/bugs/1657674 There is a power saving mechanism in rt5660. It will turn off some unused power when MCLK is not present. We call that "MCLK detection" and it should be enabled by default. Signed-off-by:
Bard Liao <bardliao@realtek.com> Signed-off-by:
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Oder Chiou authored
BugLink: http://bugs.launchpad.net/bugs/1657674 This is the initial codec driver for rt5660 Signed-off-by:
Oder Chiou <oder_chiou@realtek.com> Signed-off-by:
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Luis Henriques authored
BugLink: http://bugs.launchpad.net/bugs/1657682Signed-off-by:
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Luis Henriques authored
BugLink: http://bugs.launchpad.net/bugs/1657682Signed-off-by:
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Shrirang Bagul authored
BugLink: http://bugs.launchpad.net/bugs/1657682 This patch limits the RS9113 driver from vendor to be used for the WLAN/BT card mounted on Dell Caracalla IoT gateways. Signed-off-by:
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Darren Wu authored
BugLink: http://bugs.launchpad.net/bugs/1657682 This is the beta2 release for RS9113 driver from Redpine Signed-off-by:
Darren Wu <darren.wu@canonical.com> Signed-off-by:
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Shrirang Bagul authored
BugLink: http://bugs.launchpad.net/bugs/1657682 The driver submitted by vendor Redpine for RS9113 WLAN/BT exports same symbols as their existing old driver in the kernel. This patch tries to resolve this conflict. Signed-off-by:
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Shrirang Bagul authored
BugLink: http://bugs.launchpad.net/bugs/1657682 This patch adds support for RS9113 WLAN-BT cards found on Dell Caracalla IoT gateways. Vendor release: RS9113.NB0.NL.GNU.LNX.0.9.3 on 12/01/2016 Signed-off-by:
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stephen hemminger authored
BugLink: http://bugs.launchpad.net/bugs/1657540 The receive callback (in tasklet context) is using RCU to get reference to associated VF network device but this is not safe. RCU read lock needs to be held. Found by running with full lockdep debugging enabled. Fixes: f207c10d ("hv_netvsc: use RCU to protect vf_netdev") Signed-off-by:
Stephen Hemminger <sthemmin@microsoft.com> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit 0719e72c) Signed-off-by:
Seth Forshee <seth.forshee@canonical.com> Signed-off-by:
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Haiyang Zhang authored
BugLink: http://bugs.launchpad.net/bugs/1650059 This script helps to create bonding network devices based on synthetic NIC (the virtual network adapter usually provided by Hyper-V) and the matching VF NIC (SRIOV virtual function). So the synthetic NIC and VF NIC can function as one network device, and fail over to the synthetic NIC if VF is down. Mayjor distros (RHEL, Ubuntu, SLES) supported by Hyper-V are supported by this script. Signed-off-by:
Haiyang Zhang <haiyangz@microsoft.com> Reviewed-by:
K. Y. Srinivasan <kys@microsoft.com> Signed-off-by:
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K. Y. Srinivasan authored
BugLink: http://bugs.launchpad.net/bugs/1650059 One of the factors that can result in the host concluding that a given guest in mounting a DOS attack is if the guest generates interrupts to the host when the host is not expecting it. If these "spurious" interrupts reach a certain rate, the host can throttle the guest to minimize the impact. The host computation of the "expected number of interrupts" is strictly based on the ring transitions. Until the host logic is fixed, base the guest logic to interrupt solely on the ring state. Signed-off-by:
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stephen hemminger authored
BugLink: http://bugs.launchpad.net/bugs/1650059 Hyper-V (and Azure) support using NVGRE which requires some extra space for encapsulation headers. Because of this the largest allowed TSO packet is reduced. For older releases, hard code a fixed reduced value. For next release, there is a better solution which uses result of host offload negotiation. Signed-off-by:
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Stephen Hemminger authored
BugLink: http://bugs.launchpad.net/bugs/1650059 In commit 9a56e5d6a0ba ("Drivers: hv: make VMBus bus ids persistent") the name of vmbus devices in sysfs changed to be (in 4.9-rc1): /sys/bus/vmbus/vmbus-6aebe374-9ba0-11e6-933c-00259086b36b The prefix ("vmbus-") is redundant and differs from how PCI is represented in sysfs. Therefore simplify to: /sys/bus/vmbus/6aebe374-9ba0-11e6-933c-00259086b36b Please merge this before 4.9 is released and the old format has to live forever. Signed-off-by:
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