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INFO: task hung in sync_inodes_sb

Status: auto-closed as invalid on 2019/02/24 06:19
First crash: 2139d, last: 2060d
Similar bugs (11)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 INFO: task hung in sync_inodes_sb origin:upstream missing-backport C error 66 10d 405d 0/3 upstream: reported C repro on 2023/03/10 02:13
upstream INFO: task hung in sync_inodes_sb (5) ext4 C error inconclusive 152 11h21m 275d 0/26 upstream: reported C repro on 2023/07/18 04:00
upstream INFO: task hung in sync_inodes_sb (2) fs 4 1822d 1840d 0/26 auto-closed as invalid on 2019/10/19 16:22
upstream INFO: task hung in sync_inodes_sb (3) fs mm C done 6 1566d 1574d 15/26 fixed on 2020/02/14 01:19
upstream INFO: task hung in sync_inodes_sb fs 58 1920d 2158d 0/26 closed as dup on 2018/09/08 15:37
linux-4.14 INFO: task hung in sync_inodes_sb 1 1535d 1535d 0/1 auto-closed as invalid on 2020/06/02 17:26
android-49 INFO: task hung in sync_inodes_sb (2) 2 1649d 1811d 0/3 auto-closed as invalid on 2020/02/10 00:14
upstream INFO: task hung in sync_inodes_sb (4) nilfs C done inconclusive 345 289d 1244d 23/26 fixed on 2023/07/04 09:17
linux-6.1 INFO: task hung in sync_inodes_sb origin:upstream missing-backport C 53 7d14h 405d 0/3 upstream: reported C repro on 2023/03/10 02:07
linux-4.14 INFO: task hung in sync_inodes_sb (2) vfs C 11 428d 1196d 0/1 upstream: reported C repro on 2021/01/07 19:48
linux-4.19 INFO: task hung in sync_inodes_sb xfs C error 13 447d 1287d 0/1 upstream: reported C repro on 2020/10/09 07:19

Sample crash report:
loop0: rw=0, want=18442984958116442982, limit=264192
attempt to access beyond end of device
loop0: rw=0, want=18442984958116442984, limit=264192
attempt to access beyond end of device
loop0: rw=0, want=18442984958116442986, limit=264192
INFO: task syz-executor6:10886 blocked for more than 140 seconds.
      Not tainted 4.9.124-g09eb2ba #31
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor6   D28504 10886   3866 0x00000004
 ffff8801982ec800 0000000000000000 ffff8801d73ec540 ffff8801d9a38000
 ffff8801db221c18 ffff8801cd4c7b58 ffffffff839f0afd 0000000000000002
 0000000041b58ab3 ffffffff843bbc94 00ffffff81223870 ffff8801db2224e8
Call Trace:
 [<ffffffff839f20ff>] schedule+0x7f/0x1b0 kernel/sched/core.c:3553
 [<ffffffff816073d9>] wb_wait_for_completion+0x149/0x1b0 fs/fs-writeback.c:221
 [<ffffffff8160cb69>] sync_inodes_sb+0x1a9/0x8d0 fs/fs-writeback.c:2412
 [<ffffffff8161ec93>] sync_inodes_one_sb+0x43/0x60 fs/sync.c:73
 [<ffffffff81581590>] iterate_supers+0x130/0x260 fs/super.c:593
 [<ffffffff8161f5a2>] sys_sync+0xa2/0x170 fs/sync.c:112
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff83a019d3>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb

Showing all locks held in the system:
2 locks held by khungtaskd/519:
 #0:  (rcu_read_lock){......}, at: [<ffffffff813689dc>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff813689dc>] watchdog+0x11c/0xa20 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.+..}, at: [<ffffffff81428248>] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
2 locks held by getty/3762:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff839ffba2>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+...}, at: [<ffffffff82125402>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2142
1 lock held by syz-executor6/10886:
 #0:  (&type->s_umount_key#38){++++..}, at: [<ffffffff81581541>] iterate_supers+0xe1/0x260 fs/super.c:591
1 lock held by syz-executor6/10923:
 #0:  (&type->s_umount_key#38){++++..}, at: [<ffffffff81581541>] iterate_supers+0xe1/0x260 fs/super.c:591

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 519 Comm: khungtaskd Not tainted 4.9.124-g09eb2ba #31
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d979fd08 ffffffff81eb95e9 0000000000000000 0000000000000000
 0000000000000000 0000000000000001 ffffffff810b9fa0 ffff8801d979fd40
 ffffffff81ec4927 0000000000000000 0000000000000000 0000000000000003
Call Trace:
 [<ffffffff81eb95e9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81eb95e9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81ec4927>] nmi_cpu_backtrace.cold.2+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81ec48ba>] nmi_trigger_cpumask_backtrace+0x12a/0x14f lib/nmi_backtrace.c:60
 [<ffffffff810ba0a4>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff81368f74>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff81368f74>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff81368f74>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff81368f74>] watchdog+0x6b4/0xa20 kernel/hung_task.c:239
 [<ffffffff8119f3cd>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff83a01b9c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 6 Comm: kworker/u4:0 Not tainted 4.9.124-g09eb2ba #31
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: writeback wb_workfnc (flush-7:0)c
task: ffff8801d9a38000 task.stack: ffff8801d9a40000
RIP: 0010:[<ffffffff81360cf1>] c [<ffffffff81360cf1>] __sanitizer_cov_trace_pc+0x1/0x50 kernel/kcov.c:93
RSP: 0018:ffff8801d9a47690  EFLAGS: 00000202
RAX: ffff8801d9a38000 RBX: 0000000000000001 RCX: 0000000000000009
RDX: 0000000000000000 RSI: ffffffff81629df9 RDI: ffff8801c54749e0
RBP: ffff8801d9a47730 R08: ffff8801d9a38988 R09: 0000000000000001
R10: 0000000000000000 R11: 1ffff1003b34712c R12: 0000000000000200
R13: ffffea0006adefc0 R14: 0000000000000200 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f21e33d4000 CR3: 00000001cb77d000 CR4: 00000000001606f0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Stack:
 ffff8801d9a47730c ffffffff81629e0ac ffff8801b9a20148c ffff8801cbfb2848c
 ffffffff839f7176c ffffed00397f6509c 00000000000004b2c ffff8801cbfb2a00c
 ffffea0006adefe0c 0000000000000000c ffff8801cbfb29d0c 00000008d9a38940c
Call Trace:
 [<ffffffff8162d48d>] __bread_gfp+0x2d/0x270 fs/buffer.c:1420
 [<ffffffff818db771>] sb_bread include/linux/buffer_head.h:300 [inline]
 [<ffffffff818db771>] fat_clusters_flush+0x111/0x380 fs/fat/misc.c:69
 [<ffffffff818d56d2>] fat_write_inode+0xf2/0x170 fs/fat/inode.c:898
 [<ffffffff81606add>] write_inode fs/fs-writeback.c:1180 [inline]
 [<ffffffff81606add>] __writeback_single_inode+0x86d/0x1020 fs/fs-writeback.c:1379
 [<ffffffff81607ddc>] writeback_sb_inodes+0x4ac/0xe70 fs/fs-writeback.c:1584
 [<ffffffff8160889b>] __writeback_inodes_wb+0xfb/0x1e0 fs/fs-writeback.c:1653
 [<ffffffff81609022>] wb_writeback+0x512/0xbd0 fs/fs-writeback.c:1762
 [<ffffffff8161230e>] wb_do_writeback fs/fs-writeback.c:1894 [inline]
 [<ffffffff8161230e>] wb_workfn+0x20e/0xdb0 fs/fs-writeback.c:1930
 [<ffffffff8118f461>] process_one_work+0x7e1/0x1500 kernel/workqueue.c:2092
 [<ffffffff81190256>] worker_thread+0xd6/0x10a0 kernel/workqueue.c:2226
 [<ffffffff8119f3cd>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff83a01b9c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Code: c00 ceb c81 c4c c89 cff ce8 caf cee c1d c00 ce9 c5f cff cff cff c48 c89 cdf ce8 c02 cee c1d c00 ce9 cf9 cfe cff cff c66 c2e c0f c1f c84 c00 c00 c00 c00 c00 c0f c1f c00 c55 c<48> c89 ce5 c65 c48 c8b c04 c25 cc0 c7d c01 c00 c65 c8b c15 c4c c70 ccb c7e c81 ce2 c

Crashes (11):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/08/28 06:13 https://android.googlesource.com/kernel/common android-4.9 09eb2ba5ed0c 7ef1de9e .config console log report ci-android-49-kasan-gce-root
2018/08/26 15:09 https://android.googlesource.com/kernel/common android-4.9 09eb2ba5ed0c 758cd203 .config console log report ci-android-49-kasan-gce-root
2018/08/26 12:21 https://android.googlesource.com/kernel/common android-4.9 09eb2ba5ed0c 758cd203 .config console log report ci-android-49-kasan-gce-root
2018/08/22 13:18 https://android.googlesource.com/kernel/common android-4.9 8dd3fc2ed765 95b5c82b .config console log report ci-android-49-kasan-gce-root
2018/08/14 20:25 https://android.googlesource.com/kernel/common android-4.9 9dc978d43ec7 5084a625 .config console log report ci-android-49-kasan-gce-root
2018/08/13 23:20 https://android.googlesource.com/kernel/common android-4.9 9dc978d43ec7 7a88b141 .config console log report ci-android-49-kasan-gce-root
2018/07/22 22:39 https://android.googlesource.com/kernel/common android-4.9 47bbcd6bf8f9 8cc079c3 .config console log report ci-android-49-kasan-gce-root
2018/07/20 23:52 https://android.googlesource.com/kernel/common android-4.9 47bbcd6bf8f9 af255b09 .config console log report ci-android-49-kasan-gce-root
2018/07/18 01:41 https://android.googlesource.com/kernel/common android-4.9 f540ce029f50 6d5bd5b5 .config console log report ci-android-49-kasan-gce-root
2018/06/20 20:31 https://android.googlesource.com/kernel/common android-4.9 e1815b3eba5b 095ef806 .config console log report ci-android-49-kasan-gce-root
2018/06/10 04:22 https://android.googlesource.com/kernel/common android-4.9 db2c520bb56b 866118af .config console log report ci-android-49-kasan-gce-root
* Struck through repros no longer work on HEAD.