* [syzbot] INFO: task hung in __generic_file_fsync (3)
@ 2022-08-10 5:53 syzbot
2022-08-10 23:40 ` Dave Chinner
2024-02-16 4:59 ` [syzbot] [exfat?] [ntfs3?] " syzbot
0 siblings, 2 replies; 4+ messages in thread
From: syzbot @ 2022-08-10 5:53 UTC (permalink / raw)
To: linux-fsdevel, linux-kernel, syzkaller-bugs, viro
Hello,
syzbot found the following issue on:
HEAD commit: 200e340f2196 Merge tag 'pull-work.dcache' of git://git.ker..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13d08412080000
kernel config: https://syzkaller.appspot.com/x/.config?x=a3f4d6985d3164cd
dashboard link: https://syzkaller.appspot.com/bug?extid=ed920a72fd23eb735158
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15dd033e080000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16dbfa46080000
Bisection is inconclusive: the issue happens on the oldest tested release.
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15e0af61080000
final oops: https://syzkaller.appspot.com/x/report.txt?x=17e0af61080000
console output: https://syzkaller.appspot.com/x/log.txt?x=13e0af61080000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ed920a72fd23eb735158@syzkaller.appspotmail.com
INFO: task kworker/0:1:14 blocked for more than 143 seconds.
Not tainted 5.19.0-syzkaller-02972-g200e340f2196 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:1 state:D stack:26544 pid: 14 ppid: 2 flags:0x00004000
Workqueue: dio/loop5 dio_aio_complete_work
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5178 [inline]
__schedule+0xa00/0x4c10 kernel/sched/core.c:6490
schedule+0xda/0x1b0 kernel/sched/core.c:6566
rwsem_down_write_slowpath+0x697/0x11e0 kernel/locking/rwsem.c:1182
__down_write_common kernel/locking/rwsem.c:1297 [inline]
__down_write_common kernel/locking/rwsem.c:1294 [inline]
__down_write kernel/locking/rwsem.c:1306 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1553
inode_lock include/linux/fs.h:760 [inline]
__generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
fat_file_fsync+0x73/0x200 fs/fat/file.c:191
vfs_fsync_range+0x13a/0x220 fs/sync.c:188
generic_write_sync include/linux/fs.h:2861 [inline]
dio_complete+0x6dd/0x950 fs/direct-io.c:310
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>
INFO: task kworker/1:0:22 blocked for more than 143 seconds.
Not tainted 5.19.0-syzkaller-02972-g200e340f2196 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:0 state:D stack:27968 pid: 22 ppid: 2 flags:0x00004000
Workqueue: dio/loop1 dio_aio_complete_work
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5178 [inline]
__schedule+0xa00/0x4c10 kernel/sched/core.c:6490
schedule+0xda/0x1b0 kernel/sched/core.c:6566
rwsem_down_write_slowpath+0x697/0x11e0 kernel/locking/rwsem.c:1182
__down_write_common kernel/locking/rwsem.c:1297 [inline]
__down_write_common kernel/locking/rwsem.c:1294 [inline]
__down_write kernel/locking/rwsem.c:1306 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1553
inode_lock include/linux/fs.h:760 [inline]
__generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
fat_file_fsync+0x73/0x200 fs/fat/file.c:191
vfs_fsync_range+0x13a/0x220 fs/sync.c:188
generic_write_sync include/linux/fs.h:2861 [inline]
dio_complete+0x6dd/0x950 fs/direct-io.c:310
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>
INFO: task kworker/1:1:27 blocked for more than 143 seconds.
Not tainted 5.19.0-syzkaller-02972-g200e340f2196 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:1 state:D stack:28856 pid: 27 ppid: 2 flags:0x00004000
Workqueue: dio/loop1 dio_aio_complete_work
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5178 [inline]
__schedule+0xa00/0x4c10 kernel/sched/core.c:6490
schedule+0xda/0x1b0 kernel/sched/core.c:6566
rwsem_down_write_slowpath+0x697/0x11e0 kernel/locking/rwsem.c:1182
__down_write_common kernel/locking/rwsem.c:1297 [inline]
__down_write_common kernel/locking/rwsem.c:1294 [inline]
__down_write kernel/locking/rwsem.c:1306 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1553
inode_lock include/linux/fs.h:760 [inline]
__generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
fat_file_fsync+0x73/0x200 fs/fat/file.c:191
vfs_fsync_range+0x13a/0x220 fs/sync.c:188
generic_write_sync include/linux/fs.h:2861 [inline]
dio_complete+0x6dd/0x950 fs/direct-io.c:310
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>
INFO: task kworker/0:2:140 blocked for more than 143 seconds.
Not tainted 5.19.0-syzkaller-02972-g200e340f2196 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:2 state:D stack:26536 pid: 140 ppid: 2 flags:0x00004000
Workqueue: dio/loop5 dio_aio_complete_work
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5178 [inline]
__schedule+0xa00/0x4c10 kernel/sched/core.c:6490
schedule+0xda/0x1b0 kernel/sched/core.c:6566
rwsem_down_write_slowpath+0x697/0x11e0 kernel/locking/rwsem.c:1182
__down_write_common kernel/locking/rwsem.c:1297 [inline]
__down_write_common kernel/locking/rwsem.c:1294 [inline]
__down_write kernel/locking/rwsem.c:1306 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1553
inode_lock include/linux/fs.h:760 [inline]
__generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
fat_file_fsync+0x73/0x200 fs/fat/file.c:191
vfs_fsync_range+0x13a/0x220 fs/sync.c:188
generic_write_sync include/linux/fs.h:2861 [inline]
dio_complete+0x6dd/0x950 fs/direct-io.c:310
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>
INFO: task syz-executor775:3664 blocked for more than 144 seconds.
Not tainted 5.19.0-syzkaller-02972-g200e340f2196 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor775 state:D stack:26128 pid: 3664 ppid: 3656 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5178 [inline]
__schedule+0xa00/0x4c10 kernel/sched/core.c:6490
schedule+0xda/0x1b0 kernel/sched/core.c:6566
__inode_dio_wait fs/inode.c:2381 [inline]
inode_dio_wait+0x22a/0x270 fs/inode.c:2399
fat_setattr+0x3de/0x13c0 fs/fat/file.c:509
notify_change+0xcd0/0x1440 fs/attr.c:418
do_truncate+0x13c/0x200 fs/open.c:65
do_sys_ftruncate+0x536/0x730 fs/open.c:193
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f65df03fc79
RSP: 002b:00007f65defec2f8 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffda RBX: 0000000000000033 RCX: 00007f65df03fc79
RDX: ffffffffffffffb8 RSI: 00000000010099b8 RDI: 0000000000000004
RBP: 00007f65df0c4408 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f65df0c4400
R13: 00007f65df0c440c R14: 00007f65df0910c4 R15: 0030656c69662f2e
</TASK>
INFO: task syz-executor775:3682 blocked for more than 144 seconds.
Not tainted 5.19.0-syzkaller-02972-g200e340f2196 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor775 state:D stack:27472 pid: 3682 ppid: 3656 flags:0x00000004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5178 [inline]
__schedule+0xa00/0x4c10 kernel/sched/core.c:6490
schedule+0xda/0x1b0 kernel/sched/core.c:6566
rwsem_down_write_slowpath+0x697/0x11e0 kernel/locking/rwsem.c:1182
__down_write_common kernel/locking/rwsem.c:1297 [inline]
__down_write_common kernel/locking/rwsem.c:1294 [inline]
__down_write kernel/locking/rwsem.c:1306 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1553
inode_lock include/linux/fs.h:760 [inline]
generic_file_write_iter+0x8a/0x220 mm/filemap.c:3901
call_write_iter include/linux/fs.h:2187 [inline]
aio_write+0x34a/0x7a0 fs/aio.c:1603
__io_submit_one fs/aio.c:1975 [inline]
io_submit_one+0xf9c/0x1c70 fs/aio.c:2022
__do_sys_io_submit fs/aio.c:2081 [inline]
__se_sys_io_submit fs/aio.c:2051 [inline]
__x64_sys_io_submit+0x18c/0x330 fs/aio.c:2051
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f65df03fc79
RSP: 002b:00007f65defc22f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1
RAX: ffffffffffffffda RBX: 000000000000003c RCX: 00007f65df03fc79
RDX: 0000000020000540 RSI: 0000000000001801 RDI: 00007f65defc3000
RBP: 00007f65df0c4418 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f65df0c4410
R13: 00007f65df0c441c R14: 00007f65df0910c4 R15: 0030656c69662f2e
</TASK>
INFO: task syz-executor775:3670 blocked for more than 144 seconds.
Not tainted 5.19.0-syzkaller-02972-g200e340f2196 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor775 state:D stack:27136 pid: 3670 ppid: 3659 flags:0x00000004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5178 [inline]
__schedule+0xa00/0x4c10 kernel/sched/core.c:6490
schedule+0xda/0x1b0 kernel/sched/core.c:6566
rwsem_down_write_slowpath+0x697/0x11e0 kernel/locking/rwsem.c:1182
__down_write_common kernel/locking/rwsem.c:1297 [inline]
__down_write_common kernel/locking/rwsem.c:1294 [inline]
__down_write kernel/locking/rwsem.c:1306 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1553
inode_lock include/linux/fs.h:760 [inline]
do_truncate+0x12a/0x200 fs/open.c:63
do_sys_ftruncate+0x536/0x730 fs/open.c:193
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f65df03fc79
RSP: 002b:00007f65defec2f8 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffda RBX: 0000000000000026 RCX: 00007f65df03fc79
RDX: ffffffffffffffb8 RSI: 00000000010099b8 RDI: 0000000000000004
RBP: 00007f65df0c4408 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f65df0c4400
R13: 00007f65df0c440c R14: 00007f65df0910c4 R15: 0030656c69662f2e
</TASK>
INFO: task syz-executor775:3676 blocked for more than 144 seconds.
Not tainted 5.19.0-syzkaller-02972-g200e340f2196 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor775 state:D stack:26840 pid: 3676 ppid: 3659 flags:0x00000004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5178 [inline]
__schedule+0xa00/0x4c10 kernel/sched/core.c:6490
schedule+0xda/0x1b0 kernel/sched/core.c:6566
rwsem_down_write_slowpath+0x697/0x11e0 kernel/locking/rwsem.c:1182
__down_write_common kernel/locking/rwsem.c:1297 [inline]
__down_write_common kernel/locking/rwsem.c:1294 [inline]
__down_write kernel/locking/rwsem.c:1306 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1553
inode_lock include/linux/fs.h:760 [inline]
generic_file_write_iter+0x8a/0x220 mm/filemap.c:3901
call_write_iter include/linux/fs.h:2187 [inline]
aio_write+0x34a/0x7a0 fs/aio.c:1603
__io_submit_one fs/aio.c:1975 [inline]
io_submit_one+0xf9c/0x1c70 fs/aio.c:2022
__do_sys_io_submit fs/aio.c:2081 [inline]
__se_sys_io_submit fs/aio.c:2051 [inline]
__x64_sys_io_submit+0x18c/0x330 fs/aio.c:2051
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f65df03fc79
RSP: 002b:00007f65defc22f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1
RAX: ffffffffffffffda RBX: 000000000000002f RCX: 00007f65df03fc79
RDX: 0000000020000540 RSI: 0000000000001801 RDI: 00007f65defc3000
RBP: 00007f65df0c4418 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f65df0c4410
R13: 00007f65df0c441c R14: 00007f65df0910c4 R15: 0030656c69662f2e
</TASK>
INFO: task syz-executor775:3668 blocked for more than 145 seconds.
Not tainted 5.19.0-syzkaller-02972-g200e340f2196 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor775 state:D stack:25792 pid: 3668 ppid: 3658 flags:0x00000004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5178 [inline]
__schedule+0xa00/0x4c10 kernel/sched/core.c:6490
schedule+0xda/0x1b0 kernel/sched/core.c:6566
rwsem_down_write_slowpath+0x697/0x11e0 kernel/locking/rwsem.c:1182
__down_write_common kernel/locking/rwsem.c:1297 [inline]
__down_write_common kernel/locking/rwsem.c:1294 [inline]
__down_write kernel/locking/rwsem.c:1306 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1553
inode_lock include/linux/fs.h:760 [inline]
do_truncate+0x12a/0x200 fs/open.c:63
do_sys_ftruncate+0x536/0x730 fs/open.c:193
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f65df03fc79
RSP: 002b:00007f65defec2f8 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffda RBX: 0000000000000037 RCX: 00007f65df03fc79
RDX: ffffffffffffffb8 RSI: 00000000010099b8 RDI: 0000000000000004
RBP: 00007f65df0c4408 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f65df0c4400
R13: 00007f65df0c440c R14: 00007f65df0910c4 R15: 0030656c69662f2e
</TASK>
INFO: task syz-executor775:3675 blocked for more than 145 seconds.
Not tainted 5.19.0-syzkaller-02972-g200e340f2196 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor775 state:D stack:26600 pid: 3675 ppid: 3658 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5178 [inline]
__schedule+0xa00/0x4c10 kernel/sched/core.c:6490
schedule+0xda/0x1b0 kernel/sched/core.c:6566
rwsem_down_write_slowpath+0x697/0x11e0 kernel/locking/rwsem.c:1182
__down_write_common kernel/locking/rwsem.c:1297 [inline]
__down_write_common kernel/locking/rwsem.c:1294 [inline]
__down_write kernel/locking/rwsem.c:1306 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1553
inode_lock include/linux/fs.h:760 [inline]
generic_file_write_iter+0x8a/0x220 mm/filemap.c:3901
call_write_iter include/linux/fs.h:2187 [inline]
aio_write+0x34a/0x7a0 fs/aio.c:1603
__io_submit_one fs/aio.c:1975 [inline]
io_submit_one+0xf9c/0x1c70 fs/aio.c:2022
__do_sys_io_submit fs/aio.c:2081 [inline]
__se_sys_io_submit fs/aio.c:2051 [inline]
__x64_sys_io_submit+0x18c/0x330 fs/aio.c:2051
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f65df03fc79
RSP: 002b:00007f65defc22f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1
RAX: ffffffffffffffda RBX: 000000000000002a RCX: 00007f65df03fc79
RDX: 0000000020000540 RSI: 0000000000001801 RDI: 00007f65defc3000
RBP: 00007f65df0c4418 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f65df0c4410
R13: 00007f65df0c441c R14: 00007f65df0910c4 R15: 0030656c69662f2e
</TASK>
Showing all locks held in the system:
5 locks held by kworker/u4:0/8:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8bd86870 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8bd86570 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
3 locks held by kworker/0:1/14:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc90000137da8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/1:0/22:
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc900001c7da8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de3b60 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de3b60 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/1:1/27:
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc90000a3fda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de3b60 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de3b60 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
1 lock held by khungtaskd/28:
#0: ffffffff8bd873c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6492
3 locks held by kworker/0:2/140:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc90001567da8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
2 locks held by getty/3279:
#0: ffff88814adf2098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002d162e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xe50/0x13c0 drivers/tty/n_tty.c:2124
2 locks held by syz-executor775/3664:
#0: ffff888076e3a460 (sb_writers#9){.+.+}-{0:0}, at: do_syscall_x64 arch/x86/entry/common.c:50 [inline]
#0: ffff888076e3a460 (sb_writers#9){.+.+}-{0:0}, at: do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
#1: ffff888072de3b60 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#1: ffff888072de3b60 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: do_truncate+0x12a/0x200 fs/open.c:63
1 lock held by syz-executor775/3682:
#0: ffff888072de3b60 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#0: ffff888072de3b60 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: generic_file_write_iter+0x8a/0x220 mm/filemap.c:3901
2 locks held by syz-executor775/3670:
#0: ffff888076e3a460 (sb_writers#9){.+.+}-{0:0}, at: do_syscall_x64 arch/x86/entry/common.c:50 [inline]
#0: ffff888076e3a460 (sb_writers#9){.+.+}-{0:0}, at: do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
#1: ffff888072de3b60 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#1: ffff888072de3b60 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: do_truncate+0x12a/0x200 fs/open.c:63
1 lock held by syz-executor775/3676:
#0: ffff888072de3b60 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#0: ffff888072de3b60 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: generic_file_write_iter+0x8a/0x220 mm/filemap.c:3901
2 locks held by syz-executor775/3668:
#0: ffff888076e3a460 (sb_writers#9){.+.+}-{0:0}, at: do_syscall_x64 arch/x86/entry/common.c:50 [inline]
#0: ffff888076e3a460 (sb_writers#9){.+.+}-{0:0}, at: do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
#1: ffff888072de3b60 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#1: ffff888072de3b60 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: do_truncate+0x12a/0x200 fs/open.c:63
1 lock held by syz-executor775/3675:
#0: ffff888072de3b60 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#0: ffff888072de3b60 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: generic_file_write_iter+0x8a/0x220 mm/filemap.c:3901
2 locks held by syz-executor775/3672:
#0: ffff888022a56460 (sb_writers#9){.+.+}-{0:0}, at: do_syscall_x64 arch/x86/entry/common.c:50 [inline]
#0: ffff888022a56460 (sb_writers#9){.+.+}-{0:0}, at: do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
#1: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#1: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: do_truncate+0x12a/0x200 fs/open.c:63
1 lock held by syz-executor775/3678:
#0: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#0: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: generic_file_write_iter+0x8a/0x220 mm/filemap.c:3901
3 locks held by dio/loop1/3680:
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc9000372fd58 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de3b60 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de3b60 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by dio/loop5/3683:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc9000375fd58 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/0:0/3684:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc9000376fda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/1:2/3687:
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc9000379fda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de3b60 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de3b60 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/0:3/3688:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc900037afda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/1:3/3689:
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc900037bfda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de3b60 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de3b60 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/0:4/3690:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc900037cfda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/1:4/3691:
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc900037dfda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de3b60 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de3b60 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/1:5/3692:
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc900037efda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de3b60 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de3b60 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/1:6/3693:
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff88801d7af938 ((wq_completion)dio/loop1){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc900037ffda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de3b60 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de3b60 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/0:5/3695:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc9000381fda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/0:6/3696:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc9000382fda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/0:7/3697:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc9000383fda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/0:8/3698:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc9000384fda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/0:9/3699:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc9000385fda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/0:10/3700:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc9000386fda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/0:11/3701:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc9000387fda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/0:12/3702:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc9000388fda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/0:13/3703:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc9000389fda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/0:14/3704:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc900038afda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/0:15/3705:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc900038bfda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/0:16/3706:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc900038cfda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/0:17/3707:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc900038dfda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/0:18/3708:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc900038efda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/0:19/3709:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc900038ffda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/0:20/3710:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc9000390fda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/0:21/3714:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc9000394fda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/0:22/3715:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc9000395fda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/0:23/3716:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc9000364fda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/0:24/3717:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc9000396fda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/0:25/3718:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc9000397fda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/0:30/3723:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc900039cfda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/0:33/3726:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc9000361fda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
3 locks held by kworker/0:35/3728:
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888079013538 ((wq_completion)dio/loop5){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc90003a0fda8 ((work_completion)(&dio->complete_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#2: ffff888072de54a0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 5.19.0-syzkaller-02972-g200e340f2196 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:369
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3657 Comm: syz-executor775 Not tainted 5.19.0-syzkaller-02972-g200e340f2196 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
RIP: 0010:kasan_check_range+0x15/0x180 mm/kasan/generic.c:188
Code: e4 ff ff 89 43 08 5b 5d 41 5c c3 66 2e 0f 1f 84 00 00 00 00 00 48 85 f6 0f 84 3c 01 00 00 49 89 f9 41 54 44 0f b6 c2 49 01 f1 <55> 53 0f 82 18 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 48 39 c7 0f
RSP: 0018:ffffc900035bf950 EFLAGS: 00000096
RAX: 0000000000000001 RBX: 0000000000000041 RCX: ffffffff815e4bee
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff9068e948
RBP: ffff88802373e342 R08: 0000000000000000 R09: ffffffff9068e950
R10: fffffbfff20d1d29 R11: 0000000000000001 R12: ffff88802373e320
R13: ffff88802373d880 R14: 0000000000000000 R15: 87649dd64f9f83ce
FS: 0000555556405300(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f65df090828 CR3: 00000000714a8000 CR4: 0000000000350ef0
Call Trace:
<TASK>
instrument_atomic_read include/linux/instrumented.h:71 [inline]
test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
hlock_class kernel/locking/lockdep.c:227 [inline]
lookup_chain_cache_add kernel/locking/lockdep.c:3741 [inline]
validate_chain kernel/locking/lockdep.c:3797 [inline]
__lock_acquire+0x163e/0x5660 kernel/locking/lockdep.c:5053
lock_acquire kernel/locking/lockdep.c:5666 [inline]
lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5631
seqcount_lockdep_reader_access include/linux/seqlock.h:102 [inline]
ktime_get+0x7c/0x470 kernel/time/timekeeping.c:846
__hrtimer_start_range_ns kernel/time/hrtimer.c:1244 [inline]
hrtimer_start_range_ns+0x20f/0xa80 kernel/time/hrtimer.c:1298
hrtimer_start_expires include/linux/hrtimer.h:432 [inline]
hrtimer_sleeper_start_expires kernel/time/hrtimer.c:1965 [inline]
do_nanosleep+0x1e8/0x690 kernel/time/hrtimer.c:2041
hrtimer_nanosleep+0x1f9/0x4a0 kernel/time/hrtimer.c:2097
common_nsleep+0xa2/0xc0 kernel/time/posix-timers.c:1236
__do_sys_clock_nanosleep kernel/time/posix-timers.c:1276 [inline]
__se_sys_clock_nanosleep kernel/time/posix-timers.c:1254 [inline]
__x64_sys_clock_nanosleep+0x2f4/0x430 kernel/time/posix-timers.c:1254
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f65df06673a
Code: 83 ff 03
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [syzbot] INFO: task hung in __generic_file_fsync (3)
2022-08-10 5:53 [syzbot] INFO: task hung in __generic_file_fsync (3) syzbot
@ 2022-08-10 23:40 ` Dave Chinner
2024-02-16 4:59 ` [syzbot] [exfat?] [ntfs3?] " syzbot
1 sibling, 0 replies; 4+ messages in thread
From: Dave Chinner @ 2022-08-10 23:40 UTC (permalink / raw)
To: syzbot; +Cc: linux-fsdevel, linux-kernel, syzkaller-bugs, viro
On Tue, Aug 09, 2022 at 10:53:21PM -0700, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: 200e340f2196 Merge tag 'pull-work.dcache' of git://git.ker..
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=13d08412080000
> kernel config: https://syzkaller.appspot.com/x/.config?x=a3f4d6985d3164cd
> dashboard link: https://syzkaller.appspot.com/bug?extid=ed920a72fd23eb735158
> compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15dd033e080000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16dbfa46080000
>
> Bisection is inconclusive: the issue happens on the oldest tested release.
tl;dr: Well known problem. Don't do O_DSYNC direct IO writes on vfat.
Basically, vfat uses __generic_file_sync() which takes the
inode_lock(). It's not valid to take the inode_lock() in DIO
completion callbacks as we do for O_DSYNC/O_SYNC writes because
setattr needs to do:
inode_lock()
inode_dio_wait()
<waits for inode->i_dio_count to go to zero>
to wait for all pending direct IO to drain before it can proceed.
Hence:
<dio holds inode->i_dio_count reference>
dio_complete
generic_write_sync
vfs_fsync_range
fat_file_fsync
__generic_file_fsync
inode_lock
<blocks>
O_DSYNC DIO completion will attempt to lock the inode with an
elevated inode->i_dio_count (as is always the case when
dio_complete() is called) and hence we have a trivial ABBA deadlock
vector via truncate, hole punching, etc.
> INFO: task kworker/0:1:14 blocked for more than 143 seconds.
> Not tainted 5.19.0-syzkaller-02972-g200e340f2196 #0
> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> task:kworker/0:1 state:D stack:26544 pid: 14 ppid: 2 flags:0x00004000
> Workqueue: dio/loop5 dio_aio_complete_work
> Call Trace:
> <TASK>
> context_switch kernel/sched/core.c:5178 [inline]
> __schedule+0xa00/0x4c10 kernel/sched/core.c:6490
> schedule+0xda/0x1b0 kernel/sched/core.c:6566
> rwsem_down_write_slowpath+0x697/0x11e0 kernel/locking/rwsem.c:1182
> __down_write_common kernel/locking/rwsem.c:1297 [inline]
> __down_write_common kernel/locking/rwsem.c:1294 [inline]
> __down_write kernel/locking/rwsem.c:1306 [inline]
> down_write+0x135/0x150 kernel/locking/rwsem.c:1553
> inode_lock include/linux/fs.h:760 [inline]
> __generic_file_fsync+0xb0/0x1f0 fs/libfs.c:1119
> fat_file_fsync+0x73/0x200 fs/fat/file.c:191
> vfs_fsync_range+0x13a/0x220 fs/sync.c:188
> generic_write_sync include/linux/fs.h:2861 [inline]
> dio_complete+0x6dd/0x950 fs/direct-io.c:310
> process_one_work+0x996/0x1610 kernel/workqueue.c:2289
> worker_thread+0x665/0x1080 kernel/workqueue.c:2436
> kthread+0x2e9/0x3a0 kernel/kthread.c:376
> ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
> </TASK>
There's dio completion.
> INFO: task syz-executor775:3664 blocked for more than 144 seconds.
> Not tainted 5.19.0-syzkaller-02972-g200e340f2196 #0
> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> task:syz-executor775 state:D stack:26128 pid: 3664 ppid: 3656 flags:0x00004004
> Call Trace:
> <TASK>
> context_switch kernel/sched/core.c:5178 [inline]
> __schedule+0xa00/0x4c10 kernel/sched/core.c:6490
> schedule+0xda/0x1b0 kernel/sched/core.c:6566
> __inode_dio_wait fs/inode.c:2381 [inline]
> inode_dio_wait+0x22a/0x270 fs/inode.c:2399
> fat_setattr+0x3de/0x13c0 fs/fat/file.c:509
> notify_change+0xcd0/0x1440 fs/attr.c:418
> do_truncate+0x13c/0x200 fs/open.c:65
> do_sys_ftruncate+0x536/0x730 fs/open.c:193
> do_syscall_x64 arch/x86/entry/common.c:50 [inline]
> do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
> entry_SYSCALL_64_after_hwframe+0x63/0xcd
There's truncate waiting on dio completion holding the inode lock.
So, as expected, any filesystem that supports DIO and calls into
__generic_file_fsync() for fsync functionality can easily deadlock
truncate against O_DSYNC DIO writes...
-Dave.
--
Dave Chinner
david@fromorbit.com
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [syzbot] [exfat?] [ntfs3?] INFO: task hung in __generic_file_fsync (3)
2022-08-10 5:53 [syzbot] INFO: task hung in __generic_file_fsync (3) syzbot
2022-08-10 23:40 ` Dave Chinner
@ 2024-02-16 4:59 ` syzbot
2024-02-16 9:58 ` Jan Kara
1 sibling, 1 reply; 4+ messages in thread
From: syzbot @ 2024-02-16 4:59 UTC (permalink / raw)
To: almaz.alexandrovich, axboe, brauner, david, fgheet255t, hdanton,
jack, linkinjeon, linux-fsdevel, linux-kernel, ntfs3, sj1557.seo,
syzkaller-bugs, viro
syzbot suspects this issue was fixed by commit:
commit 6f861765464f43a71462d52026fbddfc858239a5
Author: Jan Kara <jack@suse.cz>
Date: Wed Nov 1 17:43:10 2023 +0000
fs: Block writes to mounted block devices
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=131679fc180000
start commit: 200e340f2196 Merge tag 'pull-work.dcache' of git://git.ker..
git tree: upstream
kernel config: https://syzkaller.appspot.com/x/.config?x=a3f4d6985d3164cd
dashboard link: https://syzkaller.appspot.com/bug?extid=ed920a72fd23eb735158
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15dd033e080000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16dbfa46080000
If the result looks correct, please mark the issue as fixed by replying with:
#syz fix: fs: Block writes to mounted block devices
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [syzbot] [exfat?] [ntfs3?] INFO: task hung in __generic_file_fsync (3)
2024-02-16 4:59 ` [syzbot] [exfat?] [ntfs3?] " syzbot
@ 2024-02-16 9:58 ` Jan Kara
0 siblings, 0 replies; 4+ messages in thread
From: Jan Kara @ 2024-02-16 9:58 UTC (permalink / raw)
To: syzbot
Cc: almaz.alexandrovich, axboe, brauner, david, fgheet255t, hdanton,
jack, linkinjeon, linux-fsdevel, linux-kernel, ntfs3, sj1557.seo,
syzkaller-bugs, viro
On Thu 15-02-24 20:59:03, syzbot wrote:
> syzbot suspects this issue was fixed by commit:
>
> commit 6f861765464f43a71462d52026fbddfc858239a5
> Author: Jan Kara <jack@suse.cz>
> Date: Wed Nov 1 17:43:10 2023 +0000
>
> fs: Block writes to mounted block devices
>
> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=131679fc180000
> start commit: 200e340f2196 Merge tag 'pull-work.dcache' of git://git.ker..
> git tree: upstream
> kernel config: https://syzkaller.appspot.com/x/.config?x=a3f4d6985d3164cd
> dashboard link: https://syzkaller.appspot.com/bug?extid=ed920a72fd23eb735158
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15dd033e080000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16dbfa46080000
>
> If the result looks correct, please mark the issue as fixed by replying with:
Makes some sense and since there are no reproducers:
#syz fix: fs: Block writes to mounted block devices
Honza
--
Jan Kara <jack@suse.com>
SUSE Labs, CR
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2024-02-16 9:58 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2022-08-10 5:53 [syzbot] INFO: task hung in __generic_file_fsync (3) syzbot
2022-08-10 23:40 ` Dave Chinner
2024-02-16 4:59 ` [syzbot] [exfat?] [ntfs3?] " syzbot
2024-02-16 9:58 ` Jan Kara
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