INFO: task syz-executor.4:16519 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.4 state:D stack:28824 pid:16519 ppid: 14772 flags:0x00004004
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_preempt_disabled+0xf/0x20 kernel/sched/core.c:6382
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
io_ring_ctx_wait_and_kill+0x72/0x322 fs/io_uring.c:9527
io_uring_release+0x42/0x46 fs/io_uring.c:9556
__fput+0x286/0x9f0 fs/file_table.c:280
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
exit_to_user_mode_prepare+0x27e/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: 0033:0x7f31fa140b32
RSP: 002b:00007f31f76950f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: 0000000020ffd000 RBX: 0000000000008011 RCX: 00007f31fa140b32
RDX: 0000000000000003 RSI: 0000000000100000 RDI: 0000000020ffd000
RBP: 0000000020ffd000 R08: 0000000000000003 R09: 0000000010000000
R10: 0000000000008011 R11: 0000000000000206 R12: 0000000020000140
R13: 0000000020ffd000 R14: 0000000020000100 R15: 0000000020002000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8b982da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446
1 lock held by in:imklog/6163:
2 locks held by kworker/u4:7/8559:
1 lock held by syz-executor.4/16490:
1 lock held by syz-executor.4/16519:
#0: ffff888015ae90a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_ring_ctx_wait_and_kill+0x72/0x322 fs/io_uring.c:9527
=============================================
NMI backtrace for cpu 1
CPU: 1 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 16490 Comm: syz-executor.4 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:kmalloc include/linux/slab.h:591 [inline]
RIP: 0010:io_add_buffers fs/io_uring.c:4405 [inline]
RIP: 0010:io_provide_buffers fs/io_uring.c:4439 [inline]
RIP: 0010:io_issue_sqe+0x288a/0x7010 fs/io_uring.c:6705
Code: e3 94 ff 48 8b 44 24 40 80 38 00 0f 85 da 35 00 00 48 8b 3d 30 e2 51 09 ba 20 00 00 00 be c0 0c 40 00 e8 09 fa da ff 48 85 c0 <49> 89 c7 0f 84 a5 32 00 00 e8 c8 e3 94 ff 49 8d 7f 10 48 89 f8 48
RSP: 0018:ffffc9000369fc50 EFLAGS: 00000282
RAX: ffff8881c6665a80 RBX: dffffc0000000000 RCX: ffffffff89400068
RDX: 00000000000d618a RSI: 0000000000000000 RDI: 0000000000000000
RBP: 000000000000b7d4 R08: 000000008f7b15c1 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88806e453700
R13: 00000000200506cc R14: 000000000000d381 R15: ffff8881c6665a40
FS: 00007f31f76b6700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f874af983a0 CR3: 000000003a797000 CR4: 0000000000350ef0
Call Trace:
__io_queue_sqe fs/io_uring.c:6978 [inline]
io_req_task_submit+0xce/0x450 fs/io_uring.c:2282
tctx_task_work+0x1b3/0x630 fs/io_uring.c:2206
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
tracehook_notify_signal include/linux/tracehook.h:214 [inline]
handle_signal_work kernel/entry/common.c:146 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x256/0x290 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: 0033:0x7f31fa140ae9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f31f76b6188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 00000000000002ff RBX: 00007f31fa253f60 RCX: 00007f31fa140ae9
RDX: 0000000000000000 RSI: 00000000000002ff RDI: 0000000000000003
RBP: 00007f31fa19af25 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe37e1b11f R14: 00007f31f76b6300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: e3 94 jrcxz 0xffffff96
2: ff 48 8b decl -0x75(%rax)
5: 44 24 40 rex.R and $0x40,%al
8: 80 38 00 cmpb $0x0,(%rax)
b: 0f 85 da 35 00 00 jne 0x35eb
11: 48 8b 3d 30 e2 51 09 mov 0x951e230(%rip),%rdi # 0x951e248
18: ba 20 00 00 00 mov $0x20,%edx
1d: be c0 0c 40 00 mov $0x400cc0,%esi
22: e8 09 fa da ff callq 0xffdafa30
27: 48 85 c0 test %rax,%rax
* 2a: 49 89 c7 mov %rax,%r15 <-- trapping instruction
2d: 0f 84 a5 32 00 00 je 0x32d8
33: e8 c8 e3 94 ff callq 0xff94e400
38: 49 8d 7f 10 lea 0x10(%r15),%rdi
3c: 48 89 f8 mov %rdi,%rax
3f: 48 rex.W