INFO: task syz-executor.3:10812 blocked for more than 143 seconds.
Not tainted 5.18.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:27232 pid:10812 ppid: 3646 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5073 [inline]
__schedule+0xa9a/0x4cc0 kernel/sched/core.c:6388
schedule+0xd2/0x1f0 kernel/sched/core.c:6460
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:10368 [inline]
io_uring_cancel_generic+0x538/0x5bc fs/io_uring.c:10438
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:2864
arch_do_signal_or_restart+0x82/0x20f0 arch/x86/kernel/signal.c:867
exit_to_user_mode_loop kernel/entry/common.c:166 [inline]
exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:294
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fb8f1e89049
RSP: 002b:00007fb8f2fb6218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fb8f1f9bf68 RCX: 00007fb8f1e89049
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fb8f1f9bf68
RBP: 00007fb8f1f9bf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb8f1f9bf6c
R13: 00007fb8f24cfb1f R14: 00007fb8f2fb6300 R15: 0000000000022000
Showing all locks held in the system:
3 locks held by kworker/u4:0/8:
1 lock held by khungtaskd/28:
#0: ffffffff8bd81de0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6467
2 locks held by getty/3271:
#0: ffff88814cdd8098 (&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+0xcea/0x1230 drivers/tty/n_tty.c:2075
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 5.18.0-rc2-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:212 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:369
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.18.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_purge_orig
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4725 [inline]
RIP: 0010:__lock_acquire+0x67b/0x56c0 kernel/locking/lockdep.c:4979
Code: 00 00 00 48 89 fa 48 c1 ea 03 42 0f b6 14 3a 84 d2 74 06 0f 8e 7e 2c 00 00 0f b6 80 b8 00 00 00 84 c0 74 06 40 38 c5 0f 47 e8 <48> 8b 04 24 41 83 c4 01 48 c1 e8 03 42 0f b6 04 38 84 c0 74 08 3c
RSP: 0018:ffffc900000d7990 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000742 RCX: ffffffff815d4392
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff90088f58
RBP: 0000000000000004 R08: 0000000000000000 R09: ffffffff900319ef
R10: fffffbfff200633d R11: 0000000000000001 R12: 0000000000000001
R13: ffff888010e6d700 R14: ffff888010e6e160 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1d4c4e66c8 CR3: 0000000021fc9000 CR4: 00000000003506f0
Call Trace:
lock_acquire kernel/locking/lockdep.c:5641 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5606
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]
_raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:178
spin_lock_bh include/linux/spinlock.h:354 [inline]
batadv_purge_orig_ref+0x176/0x1550 net/batman-adv/originator.c:1243
batadv_purge_orig+0x17/0x60 net/batman-adv/originator.c:1272
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: 00 00 add %al,(%rax)
2: 00 48 89 add %cl,-0x77(%rax)
5: fa cli
6: 48 c1 ea 03 shr $0x3,%rdx
a: 42 0f b6 14 3a movzbl (%rdx,%r15,1),%edx
f: 84 d2 test %dl,%dl
11: 74 06 je 0x19
13: 0f 8e 7e 2c 00 00 jle 0x2c97
19: 0f b6 80 b8 00 00 00 movzbl 0xb8(%rax),%eax
20: 84 c0 test %al,%al
22: 74 06 je 0x2a
24: 40 38 c5 cmp %al,%bpl
27: 0f 47 e8 cmova %eax,%ebp
* 2a: 48 8b 04 24 mov (%rsp),%rax <-- trapping instruction
2e: 41 83 c4 01 add $0x1,%r12d
32: 48 c1 e8 03 shr $0x3,%rax
36: 42 0f b6 04 38 movzbl (%rax,%r15,1),%eax
3b: 84 c0 test %al,%al
3d: 74 08 je 0x47
3f: 3c .byte 0x3c