INFO: task syz-executor.1:15750 blocked for more than 143 seconds.
Not tainted 5.16.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:26504 pid:15750 ppid: 6571 flags:0x20024004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
io_uring_cancel_generic+0x53d/0x690 fs/io_uring.c:9846
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/0x2220 kernel/signal.c:2852
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_fast_syscall_32+0x72/0xf0 arch/x86/entry/common.c:181
do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf6edc549
RSP: 002b:00000000f44d667c EFLAGS: 00000296 ORIG_RAX: 00000000000000f0
RAX: fffffffffffffe00 RBX: 00000000f7038fa8 RCX: 0000000000000080
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000f7038fac
RBP: 0000000000000081 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff8bb83ca0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by systemd-journal/2969:
1 lock held by in:imklog/6218:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.16.0-rc2-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:111
nmi_trigger_cpumask_backtrace+0x1b3/0x230 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: 6220 Comm: rs:main Q:Reg Not tainted 5.16.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
RIP: 0010:hlock_class kernel/locking/lockdep.c:199 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4725 [inline]
RIP: 0010:__lock_acquire+0x6d9/0x54a0 kernel/locking/lockdep.c:4977
Code: 48 89 fa 48 c1 ea 03 42 0f b6 14 3a 84 d2 74 09 80 fa 03 0f 8e 10 2b 00 00 0f b7 53 20 66 81 e2 ff 1f 0f b7 da be 08 00 00 00 <48> 89 d8 48 c1 f8 06 48 8d 3c c5 00 1a f7 8f e8 73 06 62 00 48 0f
RSP: 0018:ffffc9000bb7f438 EFLAGS: 00000006
RAX: 000000000000000f RBX: 0000000000000153 RCX: ffffffff815c536d
RDX: 0000000000000153 RSI: 0000000000000008 RDI: ffff888018898af8
RBP: 0000000000000003 R08: 0000000000000000 R09: ffffffff8ff71a9f
R10: fffffbfff1fee353 R11: 0000000000000001 R12: 0000000000000003
R13: ffff888018898000 R14: ffff888018898a60 R15: dffffc0000000000
FS: 00007fa891416700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000054 CR3: 000000001c0bd000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162
__unfreeze_partials+0x79/0x360 mm/slub.c:2491
qlink_free mm/kasan/quarantine.c:146 [inline]
qlist_free_all+0x5a/0xc0 mm/kasan/quarantine.c:165
kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:272
__kasan_slab_alloc+0xa2/0xc0 mm/kasan/common.c:444
kasan_slab_alloc include/linux/kasan.h:259 [inline]
slab_post_alloc_hook mm/slab.h:519 [inline]
slab_alloc_node mm/slub.c:3234 [inline]
slab_alloc mm/slub.c:3242 [inline]
kmem_cache_alloc+0x202/0x3a0 mm/slub.c:3247
kmem_cache_zalloc include/linux/slab.h:714 [inline]
alloc_buffer_head+0x20/0x140 fs/buffer.c:3309
alloc_page_buffers+0x268/0x5f0 fs/buffer.c:832
create_empty_buffers+0x2c/0x800 fs/buffer.c:1560
ext4_block_write_begin+0xd1d/0x1140 fs/ext4/inode.c:1060
ext4_da_write_begin+0x3eb/0xad0 fs/ext4/inode.c:2966
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: 0033:0x7fa893e5a1cd
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:00007fa891415590 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa888029260 RCX: 00007fa893e5a1cd
RDX: 000000000000043b RSI: 00007fa888029260 RDI: 0000000000000009
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00007fa888028fe0
R13: 00007fa8914155b0 R14: 000055fed22df7c0 R15: 000000000000043b
----------------
Code disassembly (best guess):
0: 48 89 fa mov %rdi,%rdx
3: 48 c1 ea 03 shr $0x3,%rdx
7: 42 0f b6 14 3a movzbl (%rdx,%r15,1),%edx
c: 84 d2 test %dl,%dl
e: 74 09 je 0x19
10: 80 fa 03 cmp $0x3,%dl
13: 0f 8e 10 2b 00 00 jle 0x2b29
19: 0f b7 53 20 movzwl 0x20(%rbx),%edx
1d: 66 81 e2 ff 1f and $0x1fff,%dx
22: 0f b7 da movzwl %dx,%ebx
25: be 08 00 00 00 mov $0x8,%esi
* 2a: 48 89 d8 mov %rbx,%rax <-- trapping instruction
2d: 48 c1 f8 06 sar $0x6,%rax
31: 48 8d 3c c5 00 1a f7 lea -0x7008e600(,%rax,8),%rdi
38: 8f
39: e8 73 06 62 00 callq 0x6206b1
3e: 48 rex.W
3f: 0f .byte 0xf