INFO: task syz-executor.0:6718 blocked for more than 143 seconds.
Not tainted 5.16.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:26248 pid: 6718 ppid: 3636 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4f00 kernel/sched/core.c:6296
schedule+0xd2/0x260 kernel/sched/core.c:6369
perf_event_free_task+0x518/0x6c0 kernel/events/core.c:12885
copy_process+0x2f5e/0x7310 kernel/fork.c:2432
create_io_thread+0xb6/0xf0 kernel/fork.c:2504
io_sq_offload_create fs/io_uring.c:8801 [inline]
io_uring_create fs/io_uring.c:10476 [inline]
io_uring_setup.cold+0x2311/0x2454 fs/io_uring.c:10562
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: 0033:0x7fbff34d7fe9
RSP: 002b:00007fbff1e2c0e8 EFLAGS: 00000206 ORIG_RAX: 00000000000001a9
RAX: ffffffffffffffda RBX: 00007fbff35eb030 RCX: 00007fbff34d7fe9
RDX: 0000000020ffd000 RSI: 0000000020000200 RDI: 00000000000021fb
RBP: 0000000020000200 R08: 0000000020000340 R09: 0000000020000340
R10: 0000000020000280 R11: 0000000000000206 R12: 0000000020000340
R13: 0000000020ffd000 R14: 0000000020000280 R15: 0000000020ff9000
Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff8bb854a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460
2 locks held by getty/3290:
#0: ffff88814a8f7098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002b932e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2077
1 lock held by kworker/u4:20/9633:
6 locks held by kworker/u4:32/11512:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.16.0-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: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: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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 9633 Comm: kworker/u4:20 Not tainted 5.16.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__lock_acquire+0x182/0x5470 kernel/locking/lockdep.c:4930
Code: 48 c1 e9 03 0f b6 0c 11 48 c7 c2 00 3a 50 90 83 e2 07 83 c2 03 89 74 24 10 38 ca 7c 08 84 c9 0f 85 d2 13 00 00 83 7c 24 10 2f <8b> 0d f8 e3 f3 0e 76 08 85 c9 0f 84 ef 10 00 00 48 ba ab aa aa aa
RSP: 0018:ffffc9000ccf7a58 EFLAGS: 00000093
RAX: ffffffff8ffb7c60 RBX: 1ffff9200199ef76 RCX: 0000000000000004
RDX: 0000000000000003 RSI: 0000000000000002 RDI: ffffffff8bb854a8
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: fffffbfff1b26fe2 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88807aca0000 R14: ffffffff8bb854a0 R15: 0000000000000002
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005610f8028600 CR3: 000000000b88e000 CR4: 00000000003506e0
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:408 [inline]
batadv_nc_worker+0x12d/0xfa0 net/batman-adv/network-coding.c:719
process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307
worker_thread+0x657/0x1110 kernel/workqueue.c:2454
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: 48 c1 e9 03 shr $0x3,%rcx
4: 0f b6 0c 11 movzbl (%rcx,%rdx,1),%ecx
8: 48 c7 c2 00 3a 50 90 mov $0xffffffff90503a00,%rdx
f: 83 e2 07 and $0x7,%edx
12: 83 c2 03 add $0x3,%edx
15: 89 74 24 10 mov %esi,0x10(%rsp)
19: 38 ca cmp %cl,%dl
1b: 7c 08 jl 0x25
1d: 84 c9 test %cl,%cl
1f: 0f 85 d2 13 00 00 jne 0x13f7
25: 83 7c 24 10 2f cmpl $0x2f,0x10(%rsp)
* 2a: 8b 0d f8 e3 f3 0e mov 0xef3e3f8(%rip),%ecx # 0xef3e428 <-- trapping instruction
30: 76 08 jbe 0x3a
32: 85 c9 test %ecx,%ecx
34: 0f 84 ef 10 00 00 je 0x1129
3a: 48 rex.W
3b: ba ab aa aa aa mov $0xaaaaaaab,%edx