INFO: task syz-executor.2:17103 blocked for more than 143 seconds.
Not tainted 5.17.0-next-20220325-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:27256 pid:17103 ppid: 3627 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5106 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6415
schedule+0xd2/0x1f0 kernel/sched/core.c:6487
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x373/0x530 kernel/sched/completion.c:106
io_wq_exit_workers fs/io-wq.c:1266 [inline]
io_wq_put_and_exit+0x4d6/0xe40 fs/io-wq.c:1301
io_uring_clean_tctx fs/io_uring.c:10577 [inline]
io_uring_cancel_generic+0x60b/0x695 fs/io_uring.c:10647
io_uring_files_cancel include/linux/io_uring.h:18 [inline]
do_exit+0x4f9/0x2a00 kernel/exit.c:750
do_group_exit+0xd2/0x2f0 kernel/exit.c:925
get_signal+0x22df/0x24c0 kernel/signal.c:2904
arch_do_signal_or_restart+0x88/0x1a10 arch/x86/kernel/signal.c:867
exit_to_user_mode_loop kernel/entry/common.c:180 [inline]
exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:215
__syscall_exit_to_user_mode_work kernel/entry/common.c:297 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:308
do_syscall_64+0x42/0x80 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fce12089049
RSP: 002b:00007fce13239218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fce1219bf68 RCX: 00007fce12089049
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fce1219bf68
RBP: 00007fce1219bf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fce1219bf6c
R13: 00007fff4151013f R14: 00007fce13239300 R15: 0000000000022000
INFO: task iou-wrk-17103:17117 can't die for more than 144 seconds.
task:iou-wrk-17103 state:R running task stack:27920 pid:17117 ppid: 3627 flags:0x00024006
Call Trace:
context_switch kernel/sched/core.c:5106 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6415
Showing all locks held in the system:
1 lock held by khungtaskd/28:
#0: ffffffff8bd82360 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6498
2 locks held by getty/3280:
#0: ffff888148e93098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002e632e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2075
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 5.17.0-next-20220325-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+0x1e6/0x230 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:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3771 Comm: kworker/u4:6 Not tainted 5.17.0-next-20220325-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:rcu_read_lock_held_common kernel/rcu/update.c:108 [inline]
RIP: 0010:rcu_read_lock_sched_held+0x17/0x70 kernel/rcu/update.c:123
Code: 44 89 e0 41 5c c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 41 54 41 bc 01 00 00 00 e8 33 07 fb 07 85 c0 75 06 44 89 e0 41 5c c3 a4 9e 00 00 84 c0 74 41 e8 0b bb 00 00 84 c0 74 38 be ff ff ff
RSP: 0018:ffffc900048b7bb0 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff815d5c71
RDX: fffffbfff1b6d643 RSI: 0000000000000008 RDI: ffffffff8db6b210
RBP: 1ffff92000916f7a R08: 0000000000000000 R09: ffffffff8db6b217
R10: fffffbfff1b6d642 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: dffffc0000000000 R15: 00000000000003b9
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005570a46a96d8 CR3: 000000000ba8e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
trace_lock_release include/trace/events/lock.h:58 [inline]
lock_release+0x522/0x720 kernel/locking/lockdep.c:5683
rcu_lock_release include/linux/rcupdate.h:273 [inline]
rcu_read_unlock include/linux/rcupdate.h:727 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
batadv_nc_worker+0x86b/0xfa0 net/batman-adv/network-coding.c:719
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
----------------
Code disassembly (best guess):
0: 44 89 e0 mov %r12d,%eax
3: 41 5c pop %r12
5: c3 retq
6: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
d: 00 00 00 00
11: 66 90 xchg %ax,%ax
13: 41 54 push %r12
15: 41 bc 01 00 00 00 mov $0x1,%r12d
1b: e8 33 07 fb 07 callq 0x7fb0753
20: 85 c0 test %eax,%eax
22: 75 06 jne 0x2a
24: 44 89 e0 mov %r12d,%eax
27: 41 5c pop %r12
29: c3 retq
* 2a: e8 a4 9e 00 00 callq 0x9ed3 <-- trapping instruction
2f: 84 c0 test %al,%al
31: 74 41 je 0x74
33: e8 0b bb 00 00 callq 0xbb43
38: 84 c0 test %al,%al
3a: 74 38 je 0x74
3c: be .byte 0xbe
3d: ff (bad)
3e: ff (bad)
3f: ff .byte 0xff