Sorry, no idea. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1037546
Title: Using asynchronous I/O can cause data corruption or a kernel oops Status in “linux” package in Ubuntu: Incomplete Bug description: How to reproduce: umount /mnt rm /dev/vdisk dd if=/dev/zero of=/dev/vdisk bs=1M count=1K mkfs.ext4 -F -O ^has_journal /dev/vdisk mount -o loop /dev/vdisk /mnt rm -f /mnt/test.* fio --verify=md5 -rw=randwrite --size=10m --bs=4k --loops=10000 --iodepth=64 --group_reporting --sync=1 --direct=1 --ioengine=libaio --directory=/mnt --name=test --thread --numjobs=16 Result: - Sometimes fio complains about data corruption, e.g. verify: bad magic header 0, wanted acca at file /mnt/test.7.0 offset 10481664, length 0 - Sometimes a kernel oops is triggered [ 2022.642479] BUG: unable to handle kernel NULL pointer dereference at 0000000000000291 [ 2022.644043] IP: [<ffffffff811de96b>] ext4_end_io_dio+0x6b/0xc0 [ 2022.645596] PGD 19e790067 PUD 19e0b6067 PMD 0 [ 2022.647131] Oops: 0000 [#1] SMP [ 2022.648631] last sysfs file: /sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size [ 2022.650156] CPU 0 [ 2022.650156] Modules linked in: ib_srp scsi_tgt netconsole configfs rdma_ucm rdma_cm iw_cm ib_addr ib_ipoib ib_cm ib_sa ib_uverbs ib_umad mlx4_ib ib_mad ib_core mlx4_en snd_hda_codec_atihdmi snd_hda_codec_analog fbcon tileblit font bitblit softcursor vga16fb vgastate radeon ttm drm_kms_helper snd_hda_intel snd_hda_codec asus_atk0110 snd_hwdep psmouse lp snd_pcm snd_timer snd soundcore serio_raw mlx4_core drm i2c_algo_bit snd_page_alloc intel_agp parport ohci1394 usbhid hid floppy sky2 skge ieee139 4 pata_marvell ahci [ 2022.650156] Pid: 4241, comm: loop0 Not tainted 2.6.32-42-server #95-Ubuntu P5Q DELUXE [ 2022.650156] RIP: 0010:[<ffffffff811de96b>] [<ffffffff811de96b>] ext4_end_io_dio+0x6b/0xc0 [ 2022.650156] RSP: 0000:ffff88019e7f3db0 EFLAGS: 00010246 [ 2022.650156] RAX: 0000000000000001 RBX: ffff88019e00a000 RCX: 0000000000000000 [ 2022.650156] RDX: 0000000000001000 RSI: ffff8801959fd7d8 RDI: ffff88019e00a000 [ 2022.650156] RBP: ffff88019e7f3dc0 R08: 0000000000000000 R09: 5600000000000000 [ 2022.650156] R10: 0000000000000000 R11: 6db6db6db6db6db7 R12: ffff8801959fd7a8 [ 2022.650156] R13: 0000000000001000 R14: ffff8801b72c0114 R15: ffff88019e7f3e80 [ 2022.650156] FS: 0000000000000000(0000) GS:ffff880007200000(0000) knlGS:0000000000000000 [ 2022.650156] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b [ 2022.650156] CR2: 0000000000000291 CR3: 00000001b757f000 CR4: 00000000000406f0 [ 2022.650156] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 2022.650156] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 2022.650156] Process loop0 (pid: 4241, threadinfo ffff88019e7f2000, task ffff8801b561dc00) [ 2022.650156] Stack: [ 2022.650156] 0000000000000000 ffff8801b5fe6800 ffff88019e7f3df0 ffffffff8117939d [ 2022.650156] <0> ffff88019e7f3df0 ffff8801b5fe6800 ffff8801b5fe6b24 0000000000000000 [ 2022.650156] <0> ffff88019e7f3e30 ffffffff811797a7 0000000000000286 ffff8801b72c0158 [ 2022.650156] Call Trace: [ 2022.650156] [<ffffffff8117939d>] dio_complete+0xbd/0xe0 [ 2022.650156] [<ffffffff811797a7>] dio_bio_end_aio+0x77/0xd0 [ 2022.650156] [<ffffffff8117429d>] bio_endio+0x1d/0x40 [ 2022.650156] [<ffffffff8137f5e0>] loop_thread+0xe0/0x270 [ 2022.650156] [<ffffffff81086470>] ? autoremove_wake_function+0x0/0x40 [ 2022.650156] [<ffffffff8137f500>] ? loop_thread+0x0/0x270 [ 2022.650156] [<ffffffff810860f6>] kthread+0x96/0xa0 [ 2022.650156] [<ffffffff810141aa>] child_rip+0xa/0x20 [ 2022.650156] [<ffffffff81086060>] ? kthread+0x0/0xa0 [ 2022.650156] [<ffffffff810141a0>] ? child_rip+0x0/0x20 [ 2022.650156] Code: 00 00 00 00 00 48 8b 1c 24 4c 8b 64 24 08 c9 c3 49 8b 44 24 10 49 89 74 24 20 49 8d 74 24 30 49 89 54 24 28 48 8b 80 08 01 00 00 <48> 8b 80 90 02 00 00 48 8b b8 50 03 00 00 e8 32 3a ea ff 49 8b [ 2022.650156] RIP [<ffffffff811de96b>] ext4_end_io_dio+0x6b/0xc0 [ 2022.650156] RSP <ffff88019e7f3db0> [ 2022.650156] CR2: 0000000000000291 [ 2022.651252] BUG: unable to handle kernel [ 2022.719317] ---[ end trace b9996e8ae6b732db ]--- --- AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21. AplayDevices: Error: [Errno 2] No such file or directory Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC1', '/dev/snd/hwC1D0', '/dev/snd/pcmC1D3p', '/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/pcmC0D1c', '/dev/snd/pcmC0D1p', '/dev/snd/timer'] failed with exit code 1: CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: Error: [Errno 2] No such file or directory Card0.Amixer.values: Error: [Errno 2] No such file or directory Card1.Amixer.info: Error: [Errno 2] No such file or directory Card1.Amixer.values: Error: [Errno 2] No such file or directory DistroRelease: Ubuntu 10.04 HibernationDevice: RESUME=UUID=ed6b25d1-0e71-46ec-aae4-502e9ce1cc58 InstallationMedia: Ubuntu-Server 10.04.4 LTS "Lucid Lynx" - Release amd64 (20120214.2) MachineType: System manufacturer P5Q DELUXE Package: linux (not installed) ProcCmdLine: root=UUID=4c2434f2-aec2-4664-8df2-f2d2ad65b039 ro quiet ProcEnviron: LANG=en_US.UTF-8 SHELL=/bin/bash ProcVersionSignature: Ubuntu 2.6.32-42.95-server 2.6.32.59+drm33.24 Regression: No RelatedPackageVersions: linux-firmware 1.34.14 Reproducible: Yes RfKill: Tags: lucid needs-upstream-testing Uname: Linux 2.6.32-42-server x86_64 UserGroups: dmi.bios.date: 07/10/2009 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 2301 dmi.board.asset.tag: To Be Filled By O.E.M. dmi.board.name: P5Q DELUXE dmi.board.vendor: ASUSTeK Computer INC. dmi.board.version: Rev 1.xx dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr2301:bd07/10/2009:svnSystemmanufacturer:pnP5QDELUXE:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5QDELUXE:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: P5Q DELUXE dmi.product.version: System Version dmi.sys.vendor: System manufacturer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1037546/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
