INFO: task syz-executor.2:26594 blocked for more than 143 seconds.
Not tainted 5.16.0-rc8-next-20220107-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:28128 pid:26594 ppid: 3634 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4e90 kernel/sched/core.c:6296
schedule+0xd2/0x260 kernel/sched/core.c:6369
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6428
__mutex_lock_common kernel/locking/mutex.c:673 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733
io_uring_del_tctx_node+0x109/0x20a fs/io_uring.c:9805
io_uring_clean_tctx fs/io_uring.c:9821 [inline]
io_uring_cancel_generic+0x5da/0x695 fs/io_uring.c:9912
io_uring_files_cancel include/linux/io_uring.h:16 [inline]
do_exit+0x52b/0x2b10 kernel/exit.c:748
do_group_exit+0x128/0x330 kernel/exit.c:932
get_signal+0x4b0/0x28c0 kernel/signal.c:2868
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: 0033:0x7f24542bbe99
RSP: 002b:00007f2452c31168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: 0000000000010000 RBX: 00007f24543cef60 RCX: 00007f24542bbe99
RDX: 00000000fffffecc RSI: 0000000020000000 RDI: 000000000000000c
RBP: 00007f2454315ff1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff09ce674f R14: 00007f2452c31300 R15: 0000000000022000
INFO: task syz-executor.2:26596 can't die for more than 143 seconds.
task:syz-executor.2 state:R running task stack:25840 pid:26596 ppid: 3634 flags:0x00004006
Call Trace:
Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff8bb829e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460
2 locks held by getty/3285:
#0: ffff88814a83c098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002b962e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2077
1 lock held by syz-executor.2/26594:
#0: ffff88807d79f0a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_uring_del_tctx_node+0x109/0x20a fs/io_uring.c:9805
2 locks held by syz-executor.2/26596:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.16.0-rc8-next-20220107-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:256 [inline]
watchdog+0xcb7/0xed0 kernel/hung_task.c:413
kthread+0x2e9/0x3a0 kernel/kthread.c:377
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: 26596 Comm: syz-executor.2 Not tainted 5.16.0-rc8-next-20220107-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:rb_erase+0x245/0x1210 lib/rbtree.c:446
Code: 3c 02 00 0f 85 a2 0f 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 89 29 48 c1 ea 03 80 3c 02 00 0f 85 29 0f 00 00 4c 89 23 <48> 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 b8 00 00 00 00 00
RSP: 0018:ffffc90000dc0d88 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffff8880b9d2afa0 RCX: 0000000000000000
RDX: 1ffff110173a55f6 RSI: ffff8880b9d2a6d0 RDI: ffff8880b9d2afb0
RBP: ffff8880b9d2afa0 R08: ffff8880b9d2afa0 R09: 0000000000000001
R10: ffffffff840dc5ac R11: 0000000000000000 R12: 0000000000000000
R13: ffff88807c2198e8 R14: 0000000000000000 R15: ffff8880b9d2a6d0
FS: 00007f2452c10700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c01d79b228 CR3: 000000007ce00000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rb_erase_cached include/linux/rbtree.h:126 [inline]
timerqueue_del+0x7f/0x140 lib/timerqueue.c:57
__remove_hrtimer+0xa1/0x2a0 kernel/time/hrtimer.c:1116
__run_hrtimer kernel/time/hrtimer.c:1665 [inline]
__hrtimer_run_queues+0x4ea/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:lock_is_held_type+0xff/0x140 kernel/locking/lockdep.c:5687
Code: 00 00 b8 ff ff ff ff 65 0f c1 05 7c cf aa 76 83 f8 01 75 29 9c 58 f6 c4 02 75 3d 48 f7 04 24 00 02 00 00 74 01 fb 48 83 c4 08 <44> 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 45 31 ed eb b9 0f 0b 48
RSP: 0018:ffffc9000d53f838 EFLAGS: 00000282
RAX: 0000000000000046 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffffff8bb82920 R08: 0000000000000000 R09: ffffffff8d944d57
R10: fffffbfff1b289aa R11: 0000000000000001 R12: ffff8880703e0000
R13: 0000000000000000 R14: 00000000ffffffff R15: ffff8880703e0a68
lock_is_held include/linux/lockdep.h:283 [inline]
rcu_read_lock_sched_held+0x3a/0x70 kernel/rcu/update.c:125
trace_lock_acquire include/trace/events/lock.h:13 [inline]
lock_acquire+0x442/0x510 kernel/locking/lockdep.c:5610
rcu_lock_acquire include/linux/rcupdate.h:268 [inline]
rcu_read_lock include/linux/rcupdate.h:694 [inline]
get_obj_cgroup_from_current+0xdc/0x4d0 mm/memcontrol.c:2922
memcg_slab_pre_alloc_hook mm/slab.h:492 [inline]
slab_pre_alloc_hook mm/slab.h:716 [inline]
slab_alloc_node mm/slub.c:3144 [inline]
slab_alloc mm/slub.c:3238 [inline]
kmem_cache_alloc_trace+0x6e/0x2c0 mm/slub.c:3255
kmalloc include/linux/slab.h:581 [inline]
io_add_buffers fs/io_uring.c:4545 [inline]
io_provide_buffers fs/io_uring.c:4579 [inline]
io_issue_sqe+0x20f4/0x72e0 fs/io_uring.c:6771
__io_queue_sqe fs/io_uring.c:7041 [inline]
io_queue_sqe fs/io_uring.c:7083 [inline]
io_submit_sqe fs/io_uring.c:7291 [inline]
io_submit_sqes+0x11df/0x8f20 fs/io_uring.c:7397
__do_sys_io_uring_enter+0xf6e/0x1f50 fs/io_uring.c:10100
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: 0033:0x7f24542bbe99
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:00007f2452c10168 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: ffffffffffffffda RBX: 00007f24543cf030 RCX: 00007f24542bbe99
RDX: 0000000000000000 RSI: 000000000000688c RDI: 0000000000000003
RBP: 00007f2454315ff1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff09ce674f R14: 00007f2452c10300 R15: 0000000000022000
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 02 00 add (%rax),%al
2: 0f 85 a2 0f 00 00 jne 0xfaa
8: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
f: fc ff df
12: 48 89 da mov %rbx,%rdx
15: 48 89 29 mov %rbp,(%rcx)
18: 48 c1 ea 03 shr $0x3,%rdx
1c: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
20: 0f 85 29 0f 00 00 jne 0xf4f
26: 4c 89 23 mov %r12,(%rbx)
* 29: 48 83 c4 18 add $0x18,%rsp <-- trapping instruction
2d: 5b pop %rbx
2e: 5d pop %rbp
2f: 41 5c pop %r12
31: 41 5d pop %r13
33: 41 5e pop %r14
35: 41 5f pop %r15
37: c3 retq
38: 48 rex.W
39: b8 00 00 00 00 mov $0x0,%eax