INFO: task syz-executor.3:25234 blocked for more than 143 seconds.
Not tainted 5.18.0-rc6-syzkaller-00161-gbc403203d65a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:28112 pid:25234 ppid: 23272 flags:0x00004004
Call Trace:
<TASK>
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_preempt_disabled+0xf/0x20 kernel/sched/core.c:6519
__mutex_lock_common kernel/locking/mutex.c:673 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733
odev_open+0x5b/0x90 sound/core/seq/oss/seq_oss.c:127
soundcore_open+0x44e/0x620 sound/sound_core.c:593
chrdev_open+0x266/0x770 fs/char_dev.c:414
do_dentry_open+0x4a1/0x11e0 fs/open.c:824
do_open fs/namei.c:3476 [inline]
path_openat+0x1c71/0x2910 fs/namei.c:3609
do_filp_open+0x1aa/0x400 fs/namei.c:3636
do_sys_openat2+0x16d/0x4c0 fs/open.c:1213
do_sys_open fs/open.c:1229 [inline]
__do_sys_openat fs/open.c:1245 [inline]
__se_sys_openat fs/open.c:1240 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1240
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: 0033:0x7f671b0890e9
RSP: 002b:00007f6719ffe168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f671b19c100 RCX: 00007f671b0890e9
RDX: 0000000000101042 RSI: 0000000020000000 RDI: ffffffffffffff9c
RBP: 00007f671b0e308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000006000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f671b6cfb1f R14: 00007f6719ffe300 R15: 0000000000022000
</TASK>
Showing all locks held in the system:
1 lock held by khungtaskd/28:
#0: ffffffff8bd820e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6467
3 locks held by kworker/u4:4/981:
#0: ffff8880b9c3a018 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:554
#1: ffff8880b9c27888 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x176/0x4e0 kernel/sched/psi.c:880
#2: ffff8880b9c3a018 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:554
2 locks held by getty/3277:
#0: ffff88801d8da098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002ce62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcea/0x1230 drivers/tty/n_tty.c:2075
1 lock held by syz-executor.3/25192:
#0: ffffffff8d48ce68 (register_mutex#4){+.+.}-{3:3}, at: odev_open+0x5b/0x90 sound/core/seq/oss/seq_oss.c:127
1 lock held by syz-executor.3/25234:
#0: ffffffff8d48ce68 (register_mutex#4){+.+.}-{3:3}, at: odev_open+0x5b/0x90 sound/core/seq/oss/seq_oss.c:127
2 locks held by syz-executor.0/25231:
#0: ffffffff8d48ce68 (register_mutex#4){+.+.}-{3:3}, at: odev_release+0x47/0x70 sound/core/seq/oss/seq_oss.c:143
#1: ffff88801b3bd9f0 (&grp->list_mutex#2){++++}-{3:3}, at: snd_seq_port_disconnect+0x4f/0x5d0 sound/core/seq/seq_ports.c:612
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 5.18.0-rc6-syzkaller-00161-gbc403203d65a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/12/2022
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+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
</TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 981 Comm: kworker/u4:4 Not tainted 5.18.0-rc6-syzkaller-00161-gbc403203d65a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/12/2022
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:check_preemption_disabled+0x46/0x170 lib/smp_processor_id.c:19
Code: 8b 1d ae 01 95 76 81 e3 ff ff ff 7f 31 ff 89 de 0f 1f 44 00 00 85 db 74 11 0f 1f 44 00 00 44 89 e0 5b 5d 41 5c 41 5d 41 5e c3 <0f> 1f 44 00 00 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de 0f 1f 44 00
RSP: 0018:ffffc9000457fa70 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 7a58e0b25d8f1306
RDX: 1ffff110039a58ab RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffffff8a2731a0 R08: 0000000000000000 R09: ffffffff9006e907
R10: fffffbfff200dd20 R11: 0000000000000001 R12: 0000000000000001
R13: ffffffff89cc5d20 R14: ffffffff8bd820e0 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f7d00a9028 CR3: 000000007f685000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 00000000e08e0077 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
lockdep_recursion_finish kernel/locking/lockdep.c:436 [inline]
lock_acquire kernel/locking/lockdep.c:5643 [inline]
lock_acquire+0x1bb/0x510 kernel/locking/lockdep.c:5606
rcu_lock_acquire include/linux/rcupdate.h:268 [inline]
rcu_read_lock include/linux/rcupdate.h:694 [inline]
batadv_iv_ogm_slide_own_bcast_window net/batman-adv/bat_iv_ogm.c:755 [inline]
batadv_iv_ogm_schedule_buff+0x5d2/0x1430 net/batman-adv/bat_iv_ogm.c:826
batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:869 [inline]
batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:862 [inline]
batadv_iv_send_outstanding_bat_ogm_packet+0x740/0x910 net/batman-adv/bat_iv_ogm.c:1713
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
</TASK>
----------------
Code disassembly (best guess):
0: 8b 1d ae 01 95 76 mov 0x769501ae(%rip),%ebx # 0x769501b4
6: 81 e3 ff ff ff 7f and $0x7fffffff,%ebx
c: 31 ff xor %edi,%edi
e: 89 de mov %ebx,%esi
10: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
15: 85 db test %ebx,%ebx
17: 74 11 je 0x2a
19: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
1e: 44 89 e0 mov %r12d,%eax
21: 5b pop %rbx
22: 5d pop %rbp
23: 41 5c pop %r12
25: 41 5d pop %r13
27: 41 5e pop %r14
29: c3 retq
* 2a: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) <-- trapping instruction
2f: 9c pushfq
30: 5b pop %rbx
31: 81 e3 00 02 00 00 and $0x200,%ebx
37: 31 ff xor %edi,%edi
39: 48 89 de mov %rbx,%rsi
3c: 0f .byte 0xf
3d: 1f (bad)
3e: 44 rex.R