INFO: task syz-executor.5:9188 blocked for more than 143 seconds.
Not tainted 5.17.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:28456 pid: 9188 ppid: 3625 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4995 [inline]
__schedule+0xa94/0x4910 kernel/sched/core.c:6304
schedule+0xd2/0x260 kernel/sched/core.c:6377
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6436
__mutex_lock_common kernel/locking/mutex.c:673 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733
tty_open_by_driver drivers/tty/tty_io.c:2050 [inline]
tty_open+0x55e/0x1000 drivers/tty/tty_io.c:2133
chrdev_open+0x266/0x770 fs/char_dev.c:414
do_dentry_open+0x4b9/0x1250 fs/open.c:824
do_open fs/namei.c:3476 [inline]
path_openat+0x1c9e/0x2940 fs/namei.c:3609
do_filp_open+0x1aa/0x400 fs/namei.c:3636
do_sys_openat2+0x16d/0x4d0 fs/open.c:1214
do_sys_open fs/open.c:1230 [inline]
__do_sys_openat fs/open.c:1246 [inline]
__se_sys_openat fs/open.c:1241 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1241
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: 0033:0x7f193aaf7049
RSP: 002b:00007f193944b168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f193ac0a030 RCX: 00007f193aaf7049
RDX: 0000000000000000 RSI: 0000000020000040 RDI: ffffffffffffff9c
RBP: 00007f193ab5108d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f193b13db1f R14: 00007f193944b300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb845e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460
2 locks held by kworker/u4:5/1406:
2 locks held by getty/3281:
#0: ffff88814ab49098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002b662e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2075
3 locks held by syz-executor.5/9187:
1 lock held by syz-executor.5/9188:
#0: ffffffff8c5b1d68 (tty_mutex){+.+.}-{3:3}, at: tty_open_by_driver drivers/tty/tty_io.c:2050 [inline]
#0: ffffffff8c5b1d68 (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-rc7-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:377
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: 1406 Comm: kworker/u4:5 Not tainted 5.17.0-rc7-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_is_held_type+0xeb/0x140 kernel/locking/lockdep.c:5684
Code: 45 31 ed 44 39 f0 41 0f 94 c5 48 c7 c7 00 60 ac 89 e8 89 0d 00 00 b8 ff ff ff ff 65 0f c1 05 ac 59 b6 76 83 f8 01 75 29 9c 58 c4 02 75 3d 48 f7 04 24 00 02 00 00 74 01 fb 48 83 c4 08 44 89
RSP: 0018:ffffc90005c9fb58 EFLAGS: 00000046
RAX: 0000000000000046 RBX: 0000000000000002 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffffff8bb84520 R08: 0000000000000000 R09: ffffffff8d942617
R10: fffffbfff1b284c2 R11: 0000000000000000 R12: ffff88801dc4d700
R13: 0000000000000000 R14: 00000000ffffffff R15: ffff88801dc4e188
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f21d0438c40 CR3: 0000000074924000 CR4: 00000000003506f0
Call Trace:
lock_is_held include/linux/lockdep.h:283 [inline]
rcu_read_lock_sched_held+0x3a/0x70 kernel/rcu/update.c:125
trace_lock_acquire include/trace/events/lock.h:13 [inline]
lock_acquire+0x442/0x510 kernel/locking/lockdep.c:5610
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+0x2e9/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: 45 31 ed xor %r13d,%r13d
3: 44 39 f0 cmp %r14d,%eax
6: 41 0f 94 c5 sete %r13b
a: 48 c7 c7 00 60 ac 89 mov $0xffffffff89ac6000,%rdi
11: e8 89 0d 00 00 callq 0xd9f
16: b8 ff ff ff ff mov $0xffffffff,%eax
1b: 65 0f c1 05 ac 59 b6 xadd %eax,%gs:0x76b659ac(%rip) # 0x76b659cf
22: 76
23: 83 f8 01 cmp $0x1,%eax
26: 75 29 jne 0x51
28: 9c pushfq
29: 58 pop %rax
* 2a: f6 c4 02 test $0x2,%ah <-- trapping instruction
2d: 75 3d jne 0x6c
2f: 48 f7 04 24 00 02 00 testq $0x200,(%rsp)
36: 00
37: 74 01 je 0x3a
39: fb sti
3a: 48 83 c4 08 add $0x8,%rsp
3e: 44 rex.R
3f: 89 .byte 0x89