INFO: task syz-executor.5:31979 blocked for more than 143 seconds.
Not tainted 5.15.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:28672 pid:31979 ppid: 6804 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0xb44/0x5960 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
__mutex_lock_common kernel/locking/mutex.c:669 [inline]
__mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729
io_uring_del_tctx_node+0x105/0x350 fs/io_uring.c:9700
io_uring_clean_tctx fs/io_uring.c:9716 [inline]
io_uring_cancel_generic+0x5cb/0x760 fs/io_uring.c:9804
io_uring_files_cancel include/linux/io_uring.h:16 [inline]
do_exit+0x265/0x2a30 kernel/exit.c:780
do_group_exit+0x125/0x310 kernel/exit.c:922
get_signal+0x47f/0x21d0 kernel/signal.c:2855
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:865
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: 0033:0x7f4458ebcae9
RSP: 002b:00007f4456432218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f4458fcff68 RCX: 00007f4458ebcae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f4458fcff68
RBP: 00007f4458fcff60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4458fcff6c
R13: 00007ffe2269c47f R14: 00007f4456432300 R15: 0000000000022000
INFO: task syz-executor.5:32003 blocked for more than 143 seconds.
Not tainted 5.15.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:28992 pid:32003 ppid: 6804 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0xb44/0x5960 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
__mutex_lock_common kernel/locking/mutex.c:669 [inline]
__mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729
io_ring_ctx_wait_and_kill+0x77/0x3c0 fs/io_uring.c:9478
io_uring_release+0x3e/0x50 fs/io_uring.c:9507
__fput+0x288/0x9f0 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: 0033:0x7f4458ebcb32
RSP: 002b:00007f44563f00f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: 0000000020ee8000 RBX: 0000000000008011 RCX: 00007f4458ebcb32
RDX: 0000000000000003 RSI: 0000000000040000 RDI: 0000000020ee8000
RBP: 0000000020ee8000 R08: 0000000000000004 R09: 0000000010000000
R10: 0000000000008011 R11: 0000000000000206 R12: 0000000020000040
R13: 0000000020ee8000 R14: 0000000020000000 R15: 0000000020ee6000
Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff8b97f0e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446
1 lock held by khugepaged/32:
1 lock held by systemd-udevd/2941:
#0: ffff88801e690828 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline]
#0: ffff88801e690828 (&mm->mmap_lock#2){++++}-{3:3}, at: do_user_addr_fault+0x9d8/0x11c0 arch/x86/mm/fault.c:1348
1 lock held by in:imklog/6237:
#0: ffff888018e5b0f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
1 lock held by syz-executor.5/31979:
#0: ffff88801e1e20a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_uring_del_tctx_node+0x105/0x350 fs/io_uring.c:9700
3 locks held by syz-executor.5/31982:
1 lock held by syz-executor.5/32003:
#0: ffff88801e1e20a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_ring_ctx_wait_and_kill+0x77/0x3c0 fs/io_uring.c:9478
1 lock held by syz-executor.5/32005:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.15.0-rc7-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+0x3e5/0x4d0 kernel/kthread.c:319
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: 32005 Comm: syz-executor.5 Not tainted 5.15.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:unwind_next_frame+0xcf1/0x1ce0 arch/x86/kernel/unwind_orc.c:540
Code: 28 84 c0 48 8b 4c 24 30 0f 84 33 07 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 54 24 08 4c 8b 64 24 60 48 c1 ea 03 80 3c 02 00 <0f> 85 98 0e 00 00 48 8b 14 24 4d 89 66 38 48 b8 00 00 00 00 00 fc
RSP: 0018:ffffc90004baf6b8 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 1ffff92000975edf RCX: ffffffff8df783bb
RDX: 1ffff92000975ef9 RSI: ffffc90004bafde0 RDI: ffffc90004bafde0
RBP: 0000000000000001 R08: ffffffff8df783b6 R09: 0000000000000001
R10: fffff52000975efd R11: 0000000000086089 R12: ffffc90004bafde8
R13: ffffc90004baf7c5 R14: ffffc90004baf790 R15: ffffffff8df783ba
FS: 00007f44563cf700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007faaee6a5000 CR3: 000000006fc25000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
____kasan_kmalloc mm/kasan/common.c:513 [inline]
____kasan_kmalloc mm/kasan/common.c:472 [inline]
__kasan_kmalloc+0xa1/0xd0 mm/kasan/common.c:522
kasan_kmalloc include/linux/kasan.h:264 [inline]
kmem_cache_alloc_trace+0x1e4/0x480 mm/slab.c:3575
kmalloc include/linux/slab.h:591 [inline]
io_add_buffers fs/io_uring.c:4382 [inline]
io_provide_buffers fs/io_uring.c:4416 [inline]
io_issue_sqe+0x3289/0x7180 fs/io_uring.c:6728
__io_queue_sqe+0x90/0xb30 fs/io_uring.c:6957
io_req_task_submit+0xbf/0x1b0 fs/io_uring.c:2231
tctx_task_work+0x189/0x6c0 fs/io_uring.c:2156
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: 0033:0x7f4458ebcae9
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:00007f44563cf188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 0000000000001000 RBX: 00007f4458fd01a0 RCX: 00007f4458ebcae9
RDX: 0000000000000000 RSI: 000000000000688c RDI: 0000000000000004
RBP: 00007f4458f16f25 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe2269c47f R14: 00007f44563cf300 R15: 0000000000022000
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 84 c0 test %al,%al
2: 48 8b 4c 24 30 mov 0x30(%rsp),%rcx
7: 0f 84 33 07 00 00 je 0x740
d: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
14: fc ff df
17: 48 8b 54 24 08 mov 0x8(%rsp),%rdx
1c: 4c 8b 64 24 60 mov 0x60(%rsp),%r12
21: 48 c1 ea 03 shr $0x3,%rdx
25: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
* 29: 0f 85 98 0e 00 00 jne 0xec7 <-- trapping instruction
2f: 48 8b 14 24 mov (%rsp),%rdx
33: 4d 89 66 38 mov %r12,0x38(%r14)
37: 48 rex.W
38: b8 00 00 00 00 mov $0x0,%eax
3d: 00 fc add %bh,%ah