INFO: task syz-executor.1:12002 can't die for more than 143 seconds.
task:syz-executor.1 state:D stack:27808 pid:12002 ppid: 3643 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4d90 kernel/sched/core.c:6296
schedule+0xd2/0x260 kernel/sched/core.c:6369
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x174/0x270 kernel/sched/completion.c:138
__flush_work+0x56c/0xb10 kernel/workqueue.c:3093
__cancel_work_timer+0x3f9/0x570 kernel/workqueue.c:3180
hci_unregister_dev+0x164/0x550 net/bluetooth/hci_core.c:2677
hci_uart_tty_close+0x241/0x2a0 drivers/bluetooth/hci_ldisc.c:548
tty_ldisc_close+0x110/0x190 drivers/tty/tty_ldisc.c:456
tty_ldisc_kill+0x94/0x150 drivers/tty/tty_ldisc.c:608
tty_ldisc_release+0x154/0x2a0 drivers/tty/tty_ldisc.c:776
tty_release_struct+0x20/0xe0 drivers/tty/tty_io.c:1697
tty_release+0xc70/0x1200 drivers/tty/tty_io.c:1868
__fput+0x286/0x9f0 fs/file_table.c:311
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
exit_to_user_mode_prepare+0x27e/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: 0033:0x7f55a08b8adb
RSP: 002b:00007ffdfd7064e0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007f55a08b8adb
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000004
RBP: 00007f55a0a1a960 R08: 0000000000000000 R09: 00007f55a0a1d4e0
R10: 0000000000000000 R11: 0000000000000293 R12: 00000000000c352c
R13: 00007ffdfd7065e0 R14: 00007f55a0a18f60 R15: 0000000000000032
</TASK>
INFO: task syz-executor.1:12002 blocked for more than 143 seconds.
Not tainted 5.16.0-rc4-next-20211210-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:27808 pid:12002 ppid: 3643 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4d90 kernel/sched/core.c:6296
schedule+0xd2/0x260 kernel/sched/core.c:6369
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x174/0x270 kernel/sched/completion.c:138
__flush_work+0x56c/0xb10 kernel/workqueue.c:3093
__cancel_work_timer+0x3f9/0x570 kernel/workqueue.c:3180
hci_unregister_dev+0x164/0x550 net/bluetooth/hci_core.c:2677
hci_uart_tty_close+0x241/0x2a0 drivers/bluetooth/hci_ldisc.c:548
tty_ldisc_close+0x110/0x190 drivers/tty/tty_ldisc.c:456
tty_ldisc_kill+0x94/0x150 drivers/tty/tty_ldisc.c:608
tty_ldisc_release+0x154/0x2a0 drivers/tty/tty_ldisc.c:776
tty_release_struct+0x20/0xe0 drivers/tty/tty_io.c:1697
tty_release+0xc70/0x1200 drivers/tty/tty_io.c:1868
__fput+0x286/0x9f0 fs/file_table.c:311
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
exit_to_user_mode_prepare+0x27e/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: 0033:0x7f55a08b8adb
RSP: 002b:00007ffdfd7064e0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007f55a08b8adb
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000004
RBP: 00007f55a0a1a960 R08: 0000000000000000 R09: 00007f55a0a1d4e0
R10: 0000000000000000 R11: 0000000000000293 R12: 00000000000c352c
R13: 00007ffdfd7065e0 R14: 00007f55a0a18f60 R15: 0000000000000032
</TASK>
Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff8bb818a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460
2 locks held by getty/3286:
#0: ffff88807f1e1098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002b962e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2077
3 locks held by kworker/u5:5/9930:
#0: ffff88801d905938 ((wq_completion)hci6){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88801d905938 ((wq_completion)hci6){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff88801d905938 ((wq_completion)hci6){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff88801d905938 ((wq_completion)hci6){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:631 [inline]
#0: ffff88801d905938 ((wq_completion)hci6){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:658 [inline]
#0: ffff88801d905938 ((wq_completion)hci6){+.+.}-{0:0}, at: process_one_work+0x890/0x1680 kernel/workqueue.c:2278
#1: ffffc9000508fdb0 ((work_completion)(&hdev->power_on)){+.+.}-{0:0}, at: process_one_work+0x8c4/0x1680 kernel/workqueue.c:2282
#2: ffff888074071000 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_open+0x2a/0x70 net/bluetooth/hci_core.c:480
1 lock held by syz-executor.1/12002:
#0: ffff88807dcf5098 (&tty->ldisc_sem){++++}-{0:0}, at: __tty_ldisc_lock drivers/tty/tty_ldisc.c:290 [inline]
#0: ffff88807dcf5098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_lock_pair_timeout drivers/tty/tty_ldisc.c:353 [inline]
#0: ffff88807dcf5098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_lock_pair drivers/tty/tty_ldisc.c:367 [inline]
#0: ffff88807dcf5098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_release+0x79/0x2a0 drivers/tty/tty_ldisc.c:775
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.16.0-rc4-next-20211210-syzkaller #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:256 [inline]
watchdog+0xcb7/0xed0 kernel/hung_task.c:413
kthread+0x405/0x4f0 kernel/kthread.c:345
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
</TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 7640 Comm: kworker/u4:11 Not tainted 5.16.0-rc4-next-20211210-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+0x1ec/0x54a0 kernel/locking/lockdep.c:4937
Code: f6 4c 8d 24 c5 00 00 00 00 74 4a 4a 8d 4c 21 d8 48 be 00 00 00 00 00 fc ff df 48 8d 79 20 49 89 f8 49 c1 e8 03 41 0f b6 34 30 <40> 84 f6 74 0a 40 80 fe 03 0f 8e 94 3b 00 00 0f b7 71 20 81 e6 ff
RSP: 0018:ffffc90002cefa60 EFLAGS: 00000806
RAX: 000000000000000a RBX: ffffffff8bb818a0 RCX: ffff88803a6be250
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88803a6be270
RBP: 0000000000000000 R08: 1ffff110074d7c4e R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000050
R13: ffff88803a6bd7c0 R14: 0000000000000002 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0005a3000 CR3: 000000000b88e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
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:412 [inline]
batadv_nc_worker+0x12d/0xfa0 net/batman-adv/network-coding.c:723
process_one_work+0x9ac/0x1680 kernel/workqueue.c:2307
worker_thread+0x652/0x11c0 kernel/workqueue.c:2454
kthread+0x405/0x4f0 kernel/kthread.c:345
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
</TASK>
----------------
Code disassembly (best guess):
0: f6 4c 8d 24 c5 testb $0xc5,0x24(%rbp,%rcx,4)
5: 00 00 add %al,(%rax)
7: 00 00 add %al,(%rax)
9: 74 4a je 0x55
b: 4a 8d 4c 21 d8 lea -0x28(%rcx,%r12,1),%rcx
10: 48 be 00 00 00 00 00 movabs $0xdffffc0000000000,%rsi
17: fc ff df
1a: 48 8d 79 20 lea 0x20(%rcx),%rdi
1e: 49 89 f8 mov %rdi,%r8
21: 49 c1 e8 03 shr $0x3,%r8
25: 41 0f b6 34 30 movzbl (%r8,%rsi,1),%esi
* 2a: 40 84 f6 test %sil,%sil <-- trapping instruction
2d: 74 0a je 0x39
2f: 40 80 fe 03 cmp $0x3,%sil
33: 0f 8e 94 3b 00 00 jle 0x3bcd
39: 0f b7 71 20 movzwl 0x20(%rcx),%esi
3d: 81 .byte 0x81
3e: e6 ff out %al,$0xff