Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
INFO: task kworker/u4:4:2862 blocked for more than 140 seconds.
Not tainted 4.14.258-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/u4:4 D26088 2862 2 0x80000000
Workqueue: netns cleanup_net
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3387
schedule+0x8d/0x1b0 kernel/sched/core.c:3431
schedule_timeout+0x80a/0xe90 kernel/time/timer.c:1724
do_wait_for_common kernel/sched/completion.c:91 [inline]
__wait_for_common kernel/sched/completion.c:112 [inline]
wait_for_common+0x272/0x430 kernel/sched/completion.c:123
flush_workqueue+0x3ce/0x1310 kernel/workqueue.c:2677
flush_scheduled_work include/linux/workqueue.h:578 [inline]
tipc_exit_net+0x38/0x60 net/tipc/core.c:96
ops_exit_list+0xa5/0x150 net/core/net_namespace.c:142
cleanup_net+0x3b3/0x840 net/core/net_namespace.c:485
process_one_work+0x793/0x14a0 kernel/workqueue.c:2117
worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Showing all locks held in the system:
3 locks held by kworker/0:0/3:
#0: ("events"){+.+.}, at: [<ffffffff81364b80>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088
#1: ((&smc->tcp_listen_work)){+.+.}, at: [<ffffffff81364bb6>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092
#2: (&smc->clcsock_release_lock){+.+.}, at: [<ffffffff86d4146c>] smc_clcsock_accept net/smc/af_smc.c:600 [inline]
#2: (&smc->clcsock_release_lock){+.+.}, at: [<ffffffff86d4146c>] smc_tcp_listen_work+0x6ac/0xb80 net/smc/af_smc.c:935
1 lock held by khungtaskd/1533:
#0: (tasklist_lock){.+.+}, at: [<ffffffff8701ebe7>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548
3 locks held by kworker/u4:4/2862:
#0: ("%s""netns"){+.+.}, at: [<ffffffff81364b80>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088
#1: (net_cleanup_work){+.+.}, at: [<ffffffff81364bb6>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092
#2: (net_mutex){+.+.}, at: [<ffffffff85c1cd70>] cleanup_net+0x110/0x840 net/core/net_namespace.c:451
3 locks held by kworker/1:2/3624:
#0: ("events"){+.+.}, at: [<ffffffff81364b80>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088
#1: ((&smc->tcp_listen_work)){+.+.}, at: [<ffffffff81364bb6>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092
#2: (&smc->clcsock_release_lock){+.+.}, at: [<ffffffff86d4146c>] smc_clcsock_accept net/smc/af_smc.c:600 [inline]
#2: (&smc->clcsock_release_lock){+.+.}, at: [<ffffffff86d4146c>] smc_tcp_listen_work+0x6ac/0xb80 net/smc/af_smc.c:935
3 locks held by kworker/0:2/4315:
#0: ("events"){+.+.}, at: [<ffffffff81364b80>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088
#1: ((&smc->tcp_listen_work)){+.+.}, at: [<ffffffff81364bb6>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092
#2: (&smc->clcsock_release_lock){+.+.}, at: [<ffffffff86d4146c>] smc_clcsock_accept net/smc/af_smc.c:600 [inline]
#2: (&smc->clcsock_release_lock){+.+.}, at: [<ffffffff86d4146c>] smc_tcp_listen_work+0x6ac/0xb80 net/smc/af_smc.c:935
3 locks held by kworker/0:3/7977:
#0: ("events"){+.+.}, at: [<ffffffff81364b80>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088
#1: ((&smc->tcp_listen_work)){+.+.}, at: [<ffffffff81364bb6>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092
#2: (&smc->clcsock_release_lock){+.+.}, at: [<ffffffff86d4146c>] smc_clcsock_accept net/smc/af_smc.c:600 [inline]
#2: (&smc->clcsock_release_lock){+.+.}, at: [<ffffffff86d4146c>] smc_tcp_listen_work+0x6ac/0xb80 net/smc/af_smc.c:935
3 locks held by kworker/1:3/8986:
#0: ("events"){+.+.}, at: [<ffffffff81364b80>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088
#1: ((&smc->tcp_listen_work)){+.+.}, at: [<ffffffff81364bb6>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092
#2: (&smc->clcsock_release_lock){+.+.}, at: [<ffffffff86d4146c>] smc_clcsock_accept net/smc/af_smc.c:600 [inline]
#2: (&smc->clcsock_release_lock){+.+.}, at: [<ffffffff86d4146c>] smc_tcp_listen_work+0x6ac/0xb80 net/smc/af_smc.c:935
3 locks held by kworker/0:6/12296:
#0: ("events"){+.+.}, at: [<ffffffff81364b80>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088
#1: ((&smc->tcp_listen_work)){+.+.}, at: [<ffffffff81364bb6>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092
#2: (&smc->clcsock_release_lock){+.+.}, at: [<ffffffff86d4146c>] smc_clcsock_accept net/smc/af_smc.c:600 [inline]
#2: (&smc->clcsock_release_lock){+.+.}, at: [<ffffffff86d4146c>] smc_tcp_listen_work+0x6ac/0xb80 net/smc/af_smc.c:935
1 lock held by syz-executor.2/13838:
#0: (net_mutex){+.+.}, at: [<ffffffff85c1d5f6>] copy_net_ns+0x156/0x440 net/core/net_namespace.c:411
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1533 Comm: khungtaskd Not tainted 4.14.258-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x1b2/0x281 lib/dump_stack.c:58
nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x13a/0x180 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline]
watchdog+0x5b9/0xb40 kernel/hung_task.c:274
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4623 Comm: systemd-journal Not tainted 4.14.258-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880a1106100 task.stack: ffff8880a1108000
RIP: 0010:___bpf_prog_run+0xa5/0x5a70 kernel/bpf/core.c:961
RSP: 0018:ffff8880a110fa48 EFLAGS: 00000246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff8880a110fe68
RDX: 0000000000000000 RSI: ffffc90001a82030 RDI: ffffffff878f07c0
RBP: ffff8880a110fb58 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff878f0220
R13: 1ffff11014221f50 R14: ffffc90001a821f0 R15: 00000000000000b4
FS: 00007f7fb916c8c0(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7fb66c0028 CR3: 00000000a1707000 CR4: 00000000003426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
Code: f6 ff 4c 89 f0 4c 89 f2 48 c1 e8 03 83 e2 07 0f b6 04 18 38 d0 7f 08 84 c0 0f 85 10 42 00 00 45 0f b6 3e 4a 8d 3c fd 20 02 8f 87 <48> 89 f8 48 c1 e8 03 80 3c 18 00 0f 85 ea 41 00 00 43 ff 24 fc
----------------
Code disassembly (best guess):
0: f6 ff idiv %bh
2: 4c 89 f0 mov %r14,%rax
5: 4c 89 f2 mov %r14,%rdx
8: 48 c1 e8 03 shr $0x3,%rax
c: 83 e2 07 and $0x7,%edx
f: 0f b6 04 18 movzbl (%rax,%rbx,1),%eax
13: 38 d0 cmp %dl,%al
15: 7f 08 jg 0x1f
17: 84 c0 test %al,%al
19: 0f 85 10 42 00 00 jne 0x422f
1f: 45 0f b6 3e movzbl (%r14),%r15d
23: 4a 8d 3c fd 20 02 8f lea -0x7870fde0(,%r15,8),%rdi
2a: 87
* 2b: 48 89 f8 mov %rdi,%rax <-- trapping instruction
2e: 48 c1 e8 03 shr $0x3,%rax
32: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1)
36: 0f 85 ea 41 00 00 jne 0x4226
3c: 43 ff 24 fc jmpq *(%r12,%r15,8)