INFO: task syz-executor.4:11558 blocked for more than 143 seconds.
Not tainted 5.17.0-rc1-syzkaller-00186-g23a46422c561 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:27824 pid:11558 ppid: 6775 flags:0x00004006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4db0 kernel/sched/core.c:6295
schedule+0xd2/0x260 kernel/sched/core.c:6368
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6427
__mutex_lock_common kernel/locking/mutex.c:673 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733
tty_release_struct+0xa9/0xe0 drivers/tty/tty_io.c:1704
tty_release+0xc70/0x1200 drivers/tty/tty_io.c:1865
__fput+0x286/0x9f0 fs/file_table.c:311
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
exit_task_work include/linux/task_work.h:32 [inline]
do_exit+0xb29/0x2a30 kernel/exit.c:806
do_group_exit+0xd2/0x2f0 kernel/exit.c:935
get_signal+0x4b0/0x28c0 kernel/signal.c:2862
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: 0033:0x7f998f5cc059
RSP: 002b:00007f998df41168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007f998f6def60 RCX: 00007f998f5cc059
RDX: 0000000020000000 RSI: 0000000000004b67 RDI: 0000000000000005
RBP: 00007f998f62608d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff4c7b3abf R14: 00007f998df41300 R15: 0000000000022000
</TASK>
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb83ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460
1 lock held by klogd/2958:
#0: ffff8880b9c39c58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:489
2 locks held by getty/3278:
#0: ffff888023835098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002b632e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2077
1 lock held by syz-executor.4/11558:
#0: ffffffff8c5be868 (tty_mutex){+.+.}-{3:3}, at: tty_release_struct+0xa9/0xe0 drivers/tty/tty_io.c:1704
3 locks held by syz-executor.2/11575:
1 lock held by syz-executor.4/11656:
#0: ffffffff8c5be868 (tty_mutex){+.+.}-{3:3}, at: tty_open_by_driver drivers/tty/tty_io.c:2050 [inline]
#0: ffffffff8c5be868 (tty_mutex){+.+.}-{3:3}, at: tty_open+0x55e/0x1000 drivers/tty/tty_io.c:2133
1 lock held by syz-executor.4/11657:
#0: ffffffff8c5be868 (tty_mutex){+.+.}-{3:3}, at: tty_open_by_driver drivers/tty/tty_io.c:2050 [inline]
#0: ffffffff8c5be868 (tty_mutex){+.+.}-{3:3}, at: tty_open+0x55e/0x1000 drivers/tty/tty_io.c:2133
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.17.0-rc1-syzkaller-00186-g23a46422c561 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
<TASK>
__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:212 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:369
kthread+0x2e9/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
</TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4436 Comm: kworker/u4:9 Not tainted 5.17.0-rc1-syzkaller-00186-g23a46422c561 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__kasan_check_read+0x0/0x10 mm/kasan/shadow.c:31
Code: 8b e8 af 84 4a 07 48 85 db 0f 85 6c e6 4b 07 48 83 c4 60 5b 5d 41 5c 41 5d c3 c3 e9 6c e7 4b 07 cc cc cc cc cc cc cc cc cc cc <48> 8b 0c 24 89 f6 31 d2 e9 f3 f9 ff ff 0f 1f 00 48 8b 0c 24 89 f6
RSP: 0018:ffffc90004f4fbc8 EFLAGS: 00000256
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88807bf01d00 RSI: 0000000000000008 RDI: ffffffff8d94c6d0
RBP: 1ffff920009e9f7c R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff88e91491 R11: 0000000000000000 R12: ffffffff8bb83ae0
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000344
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6179a52600 CR3: 000000002219c000 CR4: 0000000000350ef0
Call Trace:
<TASK>
instrument_atomic_read include/linux/instrumented.h:71 [inline]
test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
cpumask_test_cpu include/linux/cpumask.h:379 [inline]
cpu_online include/linux/cpumask.h:921 [inline]
trace_lock_release include/trace/events/lock.h:58 [inline]
lock_release+0xa1/0x720 kernel/locking/lockdep.c:5650
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+0x9ac/0x1650 kernel/workqueue.c:2307
worker_thread+0x657/0x1110 kernel/workqueue.c:2454
kthread+0x2e9/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
</TASK>
----------------
Code disassembly (best guess):
0: 8b e8 mov %eax,%ebp
2: af scas %es:(%rdi),%eax
3: 84 4a 07 test %cl,0x7(%rdx)
6: 48 85 db test %rbx,%rbx
9: 0f 85 6c e6 4b 07 jne 0x74be67b
f: 48 83 c4 60 add $0x60,%rsp
13: 5b pop %rbx
14: 5d pop %rbp
15: 41 5c pop %r12
17: 41 5d pop %r13
19: c3 retq
1a: c3 retq
1b: e9 6c e7 4b 07 jmpq 0x74be78c
20: cc int3
21: cc int3
22: cc int3
23: cc int3
24: cc int3
25: cc int3
26: cc int3
27: cc int3
28: cc int3
29: cc int3
* 2a: 48 8b 0c 24 mov (%rsp),%rcx <-- trapping instruction
2e: 89 f6 mov %esi,%esi
30: 31 d2 xor %edx,%edx
32: e9 f3 f9 ff ff jmpq 0xfffffa2a
37: 0f 1f 00 nopl (%rax)
3a: 48 8b 0c 24 mov (%rsp),%rcx
3e: 89 f6 mov %esi,%esi