INFO: task syz-executor.4:427 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:28152 pid: 427 ppid: 28412 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+0x263/0x2a20 kernel/exit.c:781
do_group_exit+0x125/0x310 kernel/exit.c:923
get_signal+0x47d/0x21d0 kernel/signal.c:2855
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: 0033:0x7f5a4103aae9
RSP: 002b:00007f5a3e5b0188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 0000000000000304 RBX: 00007f5a4114df60 RCX: 00007f5a4103aae9
RDX: 0000000000000000 RSI: 0000000000000304 RDI: 0000000000000004
RBP: 00007f5a41094f25 R08: 0000000000000000 R09: 0000000000007401
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5a41681b2f R14: 00007f5a3e5b0300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8b9838e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446
1 lock held by systemd-journal/2930:
1 lock held by in:imklog/6185:
2 locks held by agetty/6193:
#0: ffff8880121d5098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252
#1: ffffc90001ab82e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113
=============================================
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: 1339 Comm: kworker/u4:5 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:debug_smp_processor_id+0x0/0x20 lib/smp_processor_id.c:60
Code: 4d 8d 86 30 08 00 00 83 e9 01 e8 d4 52 bd ff 48 8b 74 24 28 48 c7 c7 a0 7c e4 89 e8 c3 52 bd ff e8 40 e9 cc ff eb a2 0f 1f 00 <0f> 1f 44 00 00 48 c7 c6 e0 7c e4 89 48 c7 c7 20 7d e4 89 e9 78 fe
RSP: 0018:ffffc900052a7b70 EFLAGS: 00000282
RAX: 0000000000000001 RBX: 1ffff92000a54f76 RCX: ffffffff815ce3b8
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8d6f4a90
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8d6f4a97
R10: fffffbfff1ade952 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: ffffffff8b9838e0 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1a5aedb000 CR3: 000000000b68e000 CR4: 00000000003506f0
Call Trace:
rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:330 [inline]
rcu_is_watching+0xe/0xb0 kernel/rcu/tree.c:1121
rcu_read_lock_held_common kernel/rcu/update.c:108 [inline]
rcu_read_lock_sched_held+0x1c/0x70 kernel/rcu/update.c:123
trace_lock_acquire include/trace/events/lock.h:13 [inline]
lock_acquire+0x442/0x510 kernel/locking/lockdep.c:5596
rcu_lock_acquire include/linux/rcupdate.h:268 [inline]
rcu_read_lock include/linux/rcupdate.h:688 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
batadv_nc_worker+0x12d/0xfa0 net/batman-adv/network-coding.c:723
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: 4d 8d 86 30 08 00 00 lea 0x830(%r14),%r8
7: 83 e9 01 sub $0x1,%ecx
a: e8 d4 52 bd ff callq 0xffbd52e3
f: 48 8b 74 24 28 mov 0x28(%rsp),%rsi
14: 48 c7 c7 a0 7c e4 89 mov $0xffffffff89e47ca0,%rdi
1b: e8 c3 52 bd ff callq 0xffbd52e3
20: e8 40 e9 cc ff callq 0xffcce965
25: eb a2 jmp 0xffffffc9
27: 0f 1f 00 nopl (%rax)
* 2a: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) <-- trapping instruction
2f: 48 c7 c6 e0 7c e4 89 mov $0xffffffff89e47ce0,%rsi
36: 48 c7 c7 20 7d e4 89 mov $0xffffffff89e47d20,%rdi
3d: e9 .byte 0xe9
3e: 78 fe js 0x3e