INFO: task syz-executor.0:5144 blocked for more than 143 seconds.
Not tainted 5.16.0-rc4-next-20211210-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:28024 pid: 5144 ppid: 4775 flags:0x00024004
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4d90 kernel/sched/core.c:6296
schedule+0xd2/0x260 kernel/sched/core.c:6369
io_uring_cancel_generic+0x53d/0x690 fs/io_uring.c:9967
io_uring_files_cancel include/linux/io_uring.h:16 [inline]
do_exit+0x60c/0x2c20 kernel/exit.c:787
do_group_exit+0x125/0x310 kernel/exit.c:929
get_signal+0x34c/0x28b0 kernel/signal.c:2859
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: 0033:0x7fb3f69eee99
RSP: 002b:00007fb3f5343218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fb3f6b02038 RCX: 00007fb3f69eee99
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fb3f6b02038
RBP: 00007fb3f6b02030 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb3f6b0203c
R13: 00007ffd03683eef R14: 00007fb3f5343300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff8bb818a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460
2 locks held by getty/3290:
#0: ffff88802340e098 (&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
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.16.0-rc4-next-20211210-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+0x405/0x4f0 kernel/kthread.c:345
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: 4198 Comm: kworker/u4:9 Not tainted 5.16.0-rc4-next-20211210-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__lock_acquire+0x916/0x54a0 kernel/locking/lockdep.c:5001
Code: 07 00 00 49 8d 85 58 0a 00 00 48 89 c2 48 89 44 24 68 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 73 37 00 00 <8b> 54 24 18 4d 8b bd 58 0a 00 00 85 d2 0f 84 a3 05 00 00 45 31 f6
RSP: 0018:ffffc9000af97a60 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: 0000000000000029 RCX: ffffffff815c963a
RDX: 1ffff11006ebd14b RSI: 0000000000000008 RDI: ffffffff8ffa0940
RBP: 0000000000000004 R08: 0000000000000000 R09: ffffffff8ffa0947
R10: fffffbfff1ff4128 R11: 0000000000000000 R12: ffff8880375e8ab8
R13: ffff8880375e8000 R14: ffff8880375e8a68 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e0a5449600 CR3: 000000000b88e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire kernel/locking/lockdep.c:5639 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5604
rcu_lock_acquire include/linux/rcupdate.h:268 [inline]
rcu_read_lock include/linux/rcupdate.h:694 [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+0x9ac/0x1680 kernel/workqueue.c:2307
worker_thread+0x652/0x11c0 kernel/workqueue.c:2454
kthread+0x405/0x4f0 kernel/kthread.c:345
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 00 00 add %al,(%rax)
2: 49 8d 85 58 0a 00 00 lea 0xa58(%r13),%rax
9: 48 89 c2 mov %rax,%rdx
c: 48 89 44 24 68 mov %rax,0x68(%rsp)
11: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
18: fc ff df
1b: 48 c1 ea 03 shr $0x3,%rdx
1f: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
23: 0f 85 73 37 00 00 jne 0x379c
* 29: 8b 54 24 18 mov 0x18(%rsp),%edx <-- trapping instruction
2d: 4d 8b bd 58 0a 00 00 mov 0xa58(%r13),%r15
34: 85 d2 test %edx,%edx
36: 0f 84 a3 05 00 00 je 0x5df
3c: 45 31 f6 xor %r14d,%r14d