INFO: task kworker/1:5:13231 blocked for more than 143 seconds.
Not tainted 5.2.0-rc5+ #32
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/1:5 D26392 13231 2 0x80004000
Workqueue: events linkwatch_event
Call Trace:
context_switch kernel/sched/core.c:2818 [inline]
__schedule+0x7cb/0x1560 kernel/sched/core.c:3445
schedule+0xa8/0x260 kernel/sched/core.c:3509
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3568
__mutex_lock_common kernel/locking/mutex.c:1003 [inline]
__mutex_lock+0x726/0x1310 kernel/locking/mutex.c:1073
mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1088
rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72
linkwatch_event+0xf/0x70 net/core/link_watch.c:231
process_one_work+0x989/0x1790 kernel/workqueue.c:2269
worker_thread+0x98/0xe40 kernel/workqueue.c:2415
kthread+0x354/0x420 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
INFO: task syz-executor.5:10441 blocked for more than 143 seconds.
Not tainted 5.2.0-rc5+ #32
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5 D27168 10441 9092 0x00004004
Call Trace:
context_switch kernel/sched/core.c:2818 [inline]
__schedule+0x7cb/0x1560 kernel/sched/core.c:3445
schedule+0xa8/0x260 kernel/sched/core.c:3509
exp_funnel_lock kernel/rcu/tree_exp.h:309 [inline]
synchronize_rcu_expedited+0x54e/0x5b0 kernel/rcu/tree_exp.h:790
synchronize_net+0x3b/0x60 net/core/dev.c:9269
tun_detach_all+0x3d4/0x840 drivers/net/tun.c:769
tun_net_uninit+0x16/0x20 drivers/net/tun.c:1011
rollback_registered_many+0xab8/0xfc0 net/core/dev.c:8220
rollback_registered+0x109/0x1d0 net/core/dev.c:8248
unregister_netdevice_queue net/core/dev.c:9295 [inline]
unregister_netdevice_queue+0x1ee/0x2c0 net/core/dev.c:9288
unregister_netdevice include/linux/netdevice.h:2631 [inline]
__tun_detach+0xd8a/0x1040 drivers/net/tun.c:724
tun_detach drivers/net/tun.c:741 [inline]
tun_chr_close+0xe0/0x180 drivers/net/tun.c:3441
__fput+0x2ff/0x890 fs/file_table.c:280
____fput+0x16/0x20 fs/file_table.c:313
task_work_run+0x145/0x1c0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:185 [inline]
exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:168
prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
syscall_return_slowpath arch/x86/entry/common.c:279 [inline]
do_syscall_64+0x58e/0x680 arch/x86/entry/common.c:304
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x413201
Code: Bad RIP value.
RSP: 002b:00007ffedb266350 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000413201
RDX: 0000001b2bf20000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000001 R08: 000000002dfb80b4 R09: 000000002dfb80b8
R10: 00007ffedb266430 R11: 0000000000000293 R12: 0000000000760718
R13: 00000000000d2eb7 R14: 00000000000d2ee4 R15: ffffffffffffffff
INFO: task syz-executor.2:10459 blocked for more than 143 seconds.
Not tainted 5.2.0-rc5+ #32
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.2 D27904 10459 8970 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2818 [inline]
__schedule+0x7cb/0x1560 kernel/sched/core.c:3445
schedule+0xa8/0x260 kernel/sched/core.c:3509
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3568
__mutex_lock_common kernel/locking/mutex.c:1003 [inline]
__mutex_lock+0x726/0x1310 kernel/locking/mutex.c:1073
mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1088
rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72
macsec_dump_txsc+0xa6/0x2b9 drivers/net/macsec.c:2607
genl_lock_dumpit+0x67/0x90 net/netlink/genetlink.c:482
netlink_dump+0x558/0xfb0 net/netlink/af_netlink.c:2244
__netlink_dump_start+0x5b1/0x7d0 net/netlink/af_netlink.c:2352
genl_family_rcv_msg+0xd5c/0xf90 net/netlink/genetlink.c:572
genl_rcv_msg+0xca/0x16c net/netlink/genetlink.c:654
netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477
genl_rcv+0x29/0x40 net/netlink/genetlink.c:665
netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
netlink_unicast+0x531/0x710 net/netlink/af_netlink.c:1328
netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1917
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xd7/0x130 net/socket.c:665
___sys_sendmsg+0x803/0x920 net/socket.c:2316
__sys_sendmsg+0x105/0x1d0 net/socket.c:2354
__do_sys_sendmsg net/socket.c:2363 [inline]
__se_sys_sendmsg net/socket.c:2361 [inline]
__x64_sys_sendmsg+0x78/0xb0 net/socket.c:2361
do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459519
Code: Bad RIP value.
RSP: 002b:00007f3b4439ec78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459519
RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3b4439f6d4
R13: 00000000004c71c9 R14: 00000000004dc5f0 R15: 00000000ffffffff
INFO: task syz-executor.3:10477 blocked for more than 144 seconds.
Not tainted 5.2.0-rc5+ #32
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3 D28128 10477 21626 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2818 [inline]
__schedule+0x7cb/0x1560 kernel/sched/core.c:3445
schedule+0xa8/0x260 kernel/sched/core.c:3509
exp_funnel_lock kernel/rcu/tree_exp.h:309 [inline]
synchronize_rcu_expedited+0x54e/0x5b0 kernel/rcu/tree_exp.h:790
synchronize_net+0x3b/0x60 net/core/dev.c:9269
packet_release+0x99b/0xc60 net/packet/af_packet.c:3020
__sock_release+0xce/0x2a0 net/socket.c:601
sock_close+0x1b/0x30 net/socket.c:1273
__fput+0x2ff/0x890 fs/file_table.c:280
____fput+0x16/0x20 fs/file_table.c:313
task_work_run+0x145/0x1c0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:185 [inline]
exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:168
prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
syscall_return_slowpath arch/x86/entry/common.c:279 [inline]
do_syscall_64+0x58e/0x680 arch/x86/entry/common.c:304
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x413201
Code: Bad RIP value.
RSP: 002b:00007ffc758b5e90 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000009 RCX: 0000000000413201
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000008
RBP: 0000000000000000 R08: ffffffffffffffff R09: ffffffffffffffff
R10: 00007ffc758b5f70 R11: 0000000000000293 R12: 0000000000762150
R13: 00000000000d3146 R14: 00000000000d3173 R15: ffffffffffffffff
Showing all locks held in the system:
3 locks held by kworker/1:1/22:
#0: 000000000a2d3487 ((wq_completion)events){+.+.}, at: __write_once_size include/linux/compiler.h:221 [inline]
#0: 000000000a2d3487 ((wq_completion)events){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: 000000000a2d3487 ((wq_completion)events){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
#0: 000000000a2d3487 ((wq_completion)events){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
#0: 000000000a2d3487 ((wq_completion)events){+.+.}, at: set_work_data kernel/workqueue.c:620 [inline]
#0: 000000000a2d3487 ((wq_completion)events){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:647 [inline]
#0: 000000000a2d3487 ((wq_completion)events){+.+.}, at: process_one_work+0x87e/0x1790 kernel/workqueue.c:2240
#1: 00000000ff4dd727 (deferred_process_work){+.+.}, at: process_one_work+0x8b4/0x1790 kernel/workqueue.c:2244
#2: 00000000d315d4f5 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72
1 lock held by khungtaskd/1043:
#0: 0000000086abc43a (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:5149
3 locks held by kworker/1:2/2893:
#0: 00000000e9f0fbb2 ((wq_completion)ipv6_addrconf){+.+.}, at: __write_once_size include/linux/compiler.h:221 [inline]
#0: 00000000e9f0fbb2 ((wq_completion)ipv6_addrconf){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: 00000000e9f0fbb2 ((wq_completion)ipv6_addrconf){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
#0: 00000000e9f0fbb2 ((wq_completion)ipv6_addrconf){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
#0: 00000000e9f0fbb2 ((wq_completion)ipv6_addrconf){+.+.}, at: set_work_data kernel/workqueue.c:620 [inline]
#0: 00000000e9f0fbb2 ((wq_completion)ipv6_addrconf){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:647 [inline]
#0: 00000000e9f0fbb2 ((wq_completion)ipv6_addrconf){+.+.}, at: process_one_work+0x87e/0x1790 kernel/workqueue.c:2240
#1: 000000006950b049 ((addr_chk_work).work){+.+.}, at: process_one_work+0x8b4/0x1790 kernel/workqueue.c:2244
#2: 00000000d315d4f5 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72
1 lock held by rsyslogd/8837:
2 locks held by getty/8927:
#0: 00000000afdb5dd6 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 0000000063339e19 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/8928:
#0: 000000009ca45823 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 0000000017a07cbb (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/8929:
#0: 00000000fd02e05f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 00000000abcc24d4 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/8930:
#0: 00000000b77a6799 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 000000006ad32fe5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/8931:
#0: 000000002ea58e33 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 0000000017bb0436 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/8932:
#0: 00000000827816de (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 00000000f1ade59f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/8933:
#0: 0000000019a2b405 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 0000000019fc7820 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
3 locks held by kworker/1:5/13231:
#0: 000000000a2d3487 ((wq_completion)events){+.+.}, at: __write_once_size include/linux/compiler.h:221 [inline]
#0: 000000000a2d3487 ((wq_completion)events){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: 000000000a2d3487 ((wq_completion)events){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
#0: 000000000a2d3487 ((wq_completion)events){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
#0: 000000000a2d3487 ((wq_completion)events){+.+.}, at: set_work_data kernel/workqueue.c:620 [inline]
#0: 000000000a2d3487 ((wq_completion)events){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:647 [inline]
#0: 000000000a2d3487 ((wq_completion)events){+.+.}, at: process_one_work+0x87e/0x1790 kernel/workqueue.c:2240
#1: 0000000076189657 ((linkwatch_work).work){+.+.}, at: process_one_work+0x8b4/0x1790 kernel/workqueue.c:2244
#2: 00000000d315d4f5 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72
1 lock held by syz-executor.5/10441:
#0: 00000000d315d4f5 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72
4 locks held by syz-executor.2/10459:
#0: 000000005f88bae2 (cb_lock){++++}, at: genl_rcv+0x1a/0x40 net/netlink/genetlink.c:664
#1: 00000000a175da98 (nlk_cb_mutex-GENERIC){+.+.}, at: netlink_dump+0xe7/0xfb0 net/netlink/af_netlink.c:2199
#2: 00000000f5ec9130 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline]
#2: 00000000f5ec9130 (genl_mutex){+.+.}, at: genl_lock_dumpit+0x43/0x90 net/netlink/genetlink.c:481
#3: 00000000d315d4f5 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72
1 lock held by syz-executor.3/10477:
#0: 0000000019fa9e28 (&sb->s_type->i_mutex_key#11){+.+.}, at: inode_lock include/linux/fs.h:778 [inline]
#0: 0000000019fa9e28 (&sb->s_type->i_mutex_key#11){+.+.}, at: __sock_release+0x89/0x2a0 net/socket.c:600
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1043 Comm: khungtaskd Not tainted 5.2.0-rc5+ #32
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline]
watchdog+0x9b7/0xec0 kernel/hung_task.c:289
kthread+0x354/0x420 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60