IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
INFO: task kworker/0:1:24 blocked for more than 140 seconds.
Not tainted 4.14.204-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/0:1 D28288 24 2 0x80000000
Workqueue: ipv6_addrconf addrconf_verify_work
Call Trace:
context_switch kernel/sched/core.c:2808 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3384
schedule+0x8d/0x1b0 kernel/sched/core.c:3428
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4412
process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
INFO: task kworker/1:2:3437 blocked for more than 140 seconds.
Not tainted 4.14.204-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/1:2 D27048 3437 2 0x80000000
Workqueue: events disconnect_work
Call Trace:
context_switch kernel/sched/core.c:2808 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3384
schedule+0x8d/0x1b0 kernel/sched/core.c:3428
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
disconnect_work+0x14/0x1d0 net/wireless/sme.c:664
process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
INFO: task kworker/1:1:7982 blocked for more than 140 seconds.
Not tainted 4.14.204-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/1:1 D30024 7982 2 0x80000000
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
context_switch kernel/sched/core.c:2808 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3384
schedule+0x8d/0x1b0 kernel/sched/core.c:3428
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
addrconf_dad_work+0x89/0xef0 net/ipv6/addrconf.c:3917
process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
INFO: task kworker/1:3:8033 blocked for more than 140 seconds.
Not tainted 4.14.204-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/1:3 D30208 8033 2 0x80000000
Workqueue: events linkwatch_event
Call Trace:
context_switch kernel/sched/core.c:2808 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3384
schedule+0x8d/0x1b0 kernel/sched/core.c:3428
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
linkwatch_event+0xa/0x50 net/core/link_watch.c:236
process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
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/0:1/24:
#0: ("%s"("ipv6_addrconf")){+.+.}, at: [<ffffffff81373570>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2087
#1: ((addr_chk_work).work){+.+.}, at: [<ffffffff813735a6>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2091
#2: (rtnl_mutex){+.+.}, at: [<ffffffff865212da>] addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4412
1 lock held by khungtaskd/1531:
#0: (tasklist_lock){.+.+}, at: [<ffffffff81430bd4>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548
3 locks held by kworker/1:2/3437:
#0: ("events"){+.+.}, at: [<ffffffff81373570>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2087
#1: (cfg80211_disconnect_work){+.+.}, at: [<ffffffff813735a6>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2091
#2: (rtnl_mutex){+.+.}, at: [<ffffffff86c3ecc4>] disconnect_work+0x14/0x1d0 net/wireless/sme.c:664
3 locks held by kworker/1:1/7982:
#0: ("%s"("ipv6_addrconf")){+.+.}, at: [<ffffffff81373570>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2087
#1: ((&(&ifa->dad_work)->work)){+.+.}, at: [<ffffffff813735a6>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2091
#2: (rtnl_mutex){+.+.}, at: [<ffffffff86523799>] addrconf_dad_work+0x89/0xef0 net/ipv6/addrconf.c:3917
3 locks held by kworker/1:3/8033:
#0: ("events"){+.+.}, at: [<ffffffff81373570>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2087
#1: ((linkwatch_work).work){+.+.}, at: [<ffffffff813735a6>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2091
#2: (rtnl_mutex){+.+.}, at: [<ffffffff85e3a14a>] linkwatch_event+0xa/0x50 net/core/link_watch.c:236
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1531 Comm: khungtaskd Not tainted 4.14.204-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+0x1b2/0x283 lib/dump_stack.c:58
nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x13a/0x17f 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: 8 Comm: rcu_preempt Not tainted 4.14.204-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880b5414200 task.stack: ffff8880b5418000
RIP: 0010:separate_irq_context kernel/locking/lockdep.c:3112 [inline]
RIP: 0010:__lock_acquire+0x6e5/0x3f20 kernel/locking/lockdep.c:3482
RSP: 0018:ffff8880b541fb80 EFLAGS: 00000046
RAX: 0000000000000033 RBX: 0000000000000000 RCX: 1ffff11016a82950
RDX: 0000000000000000 RSI: ffff8880b5414a88 RDI: ffffffff8b9d4cd0
RBP: ffff8880b5414aaa R08: 0000000000000001 R09: 00000000000c0033
R10: ffff8880b5414a88 R11: ffff8880b5414200 R12: ffff8880b5414aa0
R13: 0000000000000001 R14: 0000000000000033 R15: ffffffff8beb4d40
FS: 0000000000000000(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f09d6c30000 CR3: 00000000a4cc9000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998
__raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline]
_raw_spin_lock_irq+0x5b/0x80 kernel/locking/spinlock.c:168
rcu_gp_cleanup kernel/rcu/tree.c:2141 [inline]
rcu_gp_kthread+0x1050/0x1e60 kernel/rcu/tree.c:2304
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: 24 18 49 89 1a 48 ba 00 00 00 00 00 fc ff df 48 c1 e9 03 0f b6 14 11 84 d2 74 09 80 fa 03 0f 8e 0f 25 00 00 41 8b 93 80 08 00 00 <85> d2 74 75 48 8b 74 24 10 48 8d 14 92 48 8d 6c d6 d8 48 ba 00