INFO: task syz-executor.1:8426 blocked for more than 143 seconds.
Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:27784 pid: 8426 ppid: 6648 flags:0x00024004
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6250
schedule+0xd2/0x260 kernel/sched/core.c:6323
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x174/0x270 kernel/sched/completion.c:138
io_wq_exit_workers fs/io-wq.c:1204 [inline]
io_wq_put_and_exit+0x33a/0xb70 fs/io-wq.c:1239
io_uring_clean_tctx fs/io_uring.c:9770 [inline]
io_uring_cancel_generic+0x61d/0x690 fs/io_uring.c:9851
io_uring_files_cancel include/linux/io_uring.h:16 [inline]
do_exit+0x60c/0x2b40 kernel/exit.c:787
do_group_exit+0x125/0x310 kernel/exit.c:929
get_signal+0x47d/0x21d0 kernel/signal.c:2820
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7ff2059ecae9
RSP: 002b:00007ff202f20188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 00000000000002ff RBX: 00007ff205b000e0 RCX: 00007ff2059ecae9
RDX: 0000000000400000 RSI: 00000000000002ff RDI: 0000000000000003
RBP: 00007ff205a46f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff206033b2f R14: 00007ff202f20300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8b983a20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
3 locks held by kworker/u4:2/52:
1 lock held by in:imklog/6223:
#0: ffff888020d58870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__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:105
nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:295
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 6224 Comm: rs:main Q:Reg Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:ext4_block_write_begin+0x442/0x1140 fs/ext4/inode.c:1065
Code: e8 53 09 67 ff 48 8b 44 24 50 44 89 e1 45 31 ff 48 bd 00 00 00 00 00 fc ff df 48 d3 e3 c7 44 24 44 00 00 00 00 48 89 5c 24 08 <48> 8b 5c 24 18 48 c1 e8 03 48 01 e8 48 89 44 24 20 e9 30 02 00 00
RSP: 0018:ffffc9000c0ef8b8 EFLAGS: 00000246
RAX: ffffea00023ae248 RBX: 000000000000018d RCX: 0000000000000000
RDX: ffff88807ea3ba00 RSI: ffffffff8210ba4d RDI: 0000000000000003
RBP: dffffc0000000000 R08: 000000000000003f R09: 0000000000000001
R10: ffffffff8210ba3e R11: 0000000000000000 R12: 0000000000000000
R13: ffff8880758618b8 R14: 0000000000000000 R15: 0000000000000000
FS: 00007f7037fff700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2cb774f000 CR3: 000000006eed8000 CR4: 00000000003526e0
Call Trace:
ext4_da_write_begin+0x3eb/0xad0 fs/ext4/inode.c:2969
generic_perform_write+0x205/0x510 mm/filemap.c:3756
ext4_buffered_write_iter+0x1ac/0x3b0 fs/ext4/file.c:269
ext4_file_write_iter+0x423/0x14e0 fs/ext4/file.c:681
call_write_iter include/linux/fs.h:2162 [inline]
new_sync_write+0x429/0x660 fs/read_write.c:503
vfs_write+0x7cd/0xae0 fs/read_write.c:590
ksys_write+0x12d/0x250 fs/read_write.c:643
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+0x44/0xae
RIP: 0033:0x7f703ef631cd
Code: c2 20 00 00 75 10 b8 01 00 00 00 0f 05 48 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 ae fc ff ff 48 89 04 24 b8 01 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 f7 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007f7037ffe590 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f702c027e50 RCX: 00007f703ef631cd
RDX: 0000000000000598 RSI: 00007f702c027e50 RDI: 000000000000000a
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00007f702c027bd0
R13: 00007f7037ffe5b0 R14: 0000564f4a5d67c0 R15: 0000000000000598
----------------
Code disassembly (best guess):
0: e8 53 09 67 ff callq 0xff670958
5: 48 8b 44 24 50 mov 0x50(%rsp),%rax
a: 44 89 e1 mov %r12d,%ecx
d: 45 31 ff xor %r15d,%r15d
10: 48 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%rbp
17: fc ff df
1a: 48 d3 e3 shl %cl,%rbx
1d: c7 44 24 44 00 00 00 movl $0x0,0x44(%rsp)
24: 00
25: 48 89 5c 24 08 mov %rbx,0x8(%rsp)
* 2a: 48 8b 5c 24 18 mov 0x18(%rsp),%rbx <-- trapping instruction
2f: 48 c1 e8 03 shr $0x3,%rax
33: 48 01 e8 add %rbp,%rax
36: 48 89 44 24 20 mov %rax,0x20(%rsp)
3b: e9 30 02 00 00 jmpq 0x270