INFO: task syz-executor.1:12070 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:27832 pid:12070 ppid: 2487 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
io_uring_cancel_generic+0x53d/0x690 fs/io_uring.c:9850
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
irqentry_exit_to_user_mode+0x5/0x40 kernel/entry/common.c:313
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0033:0x7ffac8d6fae9
RSP: 002b:00007ffac62e5218 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007ffac8e82f68 RCX: 00007ffac8d6fae9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007ffac8e82f6c
RBP: 00007ffac8e82f60 R08: 000000000000000e R09: 0000000000000000
R10: 0000000000000302 R11: 0000000000000246 R12: 00007ffac8e82f6c
R13: 00007ffac93b6b2f R14: 00007ffac62e5300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8b983960 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446
2 locks held by agetty/6406:
#0: ffff8880223c7098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252
#1: ffffc900020dc2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113
2 locks held by kworker/u4:15/8621:
#0: ffff8880b9c39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478
#1: ffff8880b9c279c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x3a6/0x490 kernel/sched/psi.c:880
=============================================
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: 8621 Comm: kworker/u4:15 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: 0x0 (phy14)
RIP: 0010:__list_add include/linux/list.h:67 [inline]
RIP: 0010:list_add include/linux/list.h:86 [inline]
RIP: 0010:worker_enter_idle+0x1af/0x5b0 kernel/workqueue.c:1809
Code: ff df 4c 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 63 03 00 00 4c 8b 75 70 4c 89 fe 48 89 df 4c 89 f2 e8 86 89 91 02 31 ff 41 89 c5 <89> c6 e8 1a 00 2c 00 45 84 ed 0f 84 88 00 00 00 e8 cc f9 2b 00 49
RSP: 0018:ffffc90017297e18 EFLAGS: 00000046
RAX: 0000000000000001 RBX: ffff8880155c7e00 RCX: 0000000000000000
RDX: ffff888011b49600 RSI: ffff888010c69870 RDI: 0000000000000000
RBP: ffff888010c69800 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff814bc8de R11: 0000000000000000 R12: ffff888010c6986c
R13: 0000000000000001 R14: ffff888011b49600 R15: ffff888010c69870
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f66e683c000 CR3: 000000000b68e000 CR4: 00000000003526f0
Call Trace:
worker_thread+0xe3/0x11f0 kernel/workqueue.c:2463
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess), 1 bytes skipped:
0: df 4c 89 fa fisttps -0x6(%rcx,%rcx,4)
4: 48 c1 ea 03 shr $0x3,%rdx
8: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
c: 0f 85 63 03 00 00 jne 0x375
12: 4c 8b 75 70 mov 0x70(%rbp),%r14
16: 4c 89 fe mov %r15,%rsi
19: 48 89 df mov %rbx,%rdi
1c: 4c 89 f2 mov %r14,%rdx
1f: e8 86 89 91 02 callq 0x29189aa
24: 31 ff xor %edi,%edi
26: 41 89 c5 mov %eax,%r13d
* 29: 89 c6 mov %eax,%esi <-- trapping instruction
2b: e8 1a 00 2c 00 callq 0x2c004a
30: 45 84 ed test %r13b,%r13b
33: 0f 84 88 00 00 00 je 0xc1
39: e8 cc f9 2b 00 callq 0x2bfa0a
3e: 49 rex.WB