| TITLE: INFO: task hung in synchronize_rcu |
| TYPE: HANG |
| |
| [ 341.326285][ T1070] INFO: task kworker/u4:0:7 blocked for more than 143 seconds. |
| [ 341.334129][ T1070] Not tainted 5.4.0-rc1+ #0 |
| [ 341.339263][ T1070] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. |
| [ 341.348009][ T1070] kworker/u4:0 D24128 7 2 0x80004000 |
| [ 341.354425][ T1070] Workqueue: netns cleanup_net |
| [ 341.359309][ T1070] Call Trace: |
| [ 341.362623][ T1070] __schedule+0x94f/0x1e70 |
| [ 341.388635][ T1070] schedule+0xd9/0x260 |
| [ 341.392727][ T1070] synchronize_rcu_expedited+0x57f/0x5f0 |
| [ 341.430800][ T1070] synchronize_net+0x3b/0x60 |
| [ 341.435406][ T1070] rollback_registered_many+0x66e/0x10d0 |
| [ 341.456923][ T1070] unregister_netdevice_many.part.0+0x1b/0x1f0 |
| [ 341.463085][ T1070] unregister_netdevice_many+0x3b/0x50 |
| [ 341.468639][ T1070] vti6_exit_batch_net+0x467/0x690 |
| [ 341.484291][ T1070] ops_exit_list.isra.0+0xfc/0x150 |
| [ 341.489541][ T1070] cleanup_net+0x4e2/0xa60 |
| [ 341.515822][ T1070] process_one_work+0x9af/0x1740 |
| [ 341.531189][ T1070] worker_thread+0x98/0xe40 |
| [ 341.535684][ T1070] kthread+0x361/0x430 |
| [ 341.551682][ T1070] ret_from_fork+0x24/0x30 |
| [ 341.556517][ T1070] INFO: task syz-executor.2:11340 blocked for more than 143 seconds. |
| [ 341.564599][ T1070] Not tainted 5.4.0-rc1+ #0 |
| [ 341.569944][ T1070] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. |
| [ 341.578678][ T1070] syz-executor.2 D26840 11340 9045 0x00000004 |
| [ 341.585308][ T1070] Call Trace: |
| [ 341.589021][ T1070] __schedule+0x94f/0x1e70 |
| [ 341.608410][ T1070] schedule+0xd9/0x260 |
| [ 341.612503][ T1070] schedule_preempt_disabled+0x13/0x20 |
| [ 341.618048][ T1070] __mutex_lock+0x7b0/0x13c0 |
| [ 341.655109][ T1070] mutex_lock_nested+0x16/0x20 |
| [ 341.669351][ T1070] rtnl_lock+0x17/0x20 |
| [ 341.673800][ T1070] dev_ioctl+0x1a4/0xc60 |
| [ 341.678151][ T1070] sock_do_ioctl+0x1b7/0x2f0 |
| [ 341.700868][ T1070] sock_ioctl+0x3ed/0x780 |
| [ 341.714803][ T1070] do_vfs_ioctl+0xdb6/0x13e0 |
| [ 341.755193][ T1070] ksys_ioctl+0xab/0xd0 |
| [ 341.759416][ T1070] __x64_sys_ioctl+0x73/0xb0 |
| [ 341.764020][ T1070] do_syscall_64+0xfa/0x760 |
| [ 341.768703][ T1070] entry_SYSCALL_64_after_hwframe+0x49/0xbe |
| [ 341.774727][ T1070] RIP: 0033:0x459a59 |
| [ 341.778705][ T1070] Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <90> 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 |
| [ 341.798496][ T1070] RSP: 002b:00007f2916a67c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 |
| [ 341.807774][ T1070] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459a59 |
| [ 341.816119][ T1070] RDX: 0000000020000440 RSI: 0000000000008914 RDI: 0000000000000008 |
| [ 341.824111][ T1070] RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 |
| [ 341.832203][ T1070] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2916a686d4 |
| [ 341.840257][ T1070] R13: 00000000004cdab8 R14: 00000000004d7280 R15: 00000000ffffffff |
| [ 341.848302][ T1070] INFO: task syz-executor.2:11346 blocked for more than 143 seconds. |
| [ 341.856427][ T1070] Not tainted 5.4.0-rc1+ #0 |
| [ 341.861441][ T1070] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. |
| [ 341.870141][ T1070] syz-executor.2 D29712 11346 9045 0x00004004 |
| [ 341.876516][ T1070] Call Trace: |
| [ 341.879795][ T1070] __schedule+0x94f/0x1e70 |
| [ 341.899171][ T1070] schedule+0xd9/0x260 |
| [ 341.903255][ T1070] schedule_preempt_disabled+0x13/0x20 |
| [ 341.908785][ T1070] __mutex_lock+0x7b0/0x13c0 |
| [ 341.939521][ T1070] mutex_lock_nested+0x16/0x20 |
| [ 341.953849][ T1070] rtnl_lock+0x17/0x20 |
| [ 341.958012][ T1070] dev_ioctl+0x1a4/0xc60 |
| [ 341.962335][ T1070] sock_do_ioctl+0x1b7/0x2f0 |
| [ 341.984685][ T1070] sock_ioctl+0x3ed/0x780 |
| [ 341.998692][ T1070] do_vfs_ioctl+0xdb6/0x13e0 |
| [ 342.038975][ T1070] ksys_ioctl+0xab/0xd0 |
| [ 342.043130][ T1070] __x64_sys_ioctl+0x73/0xb0 |
| [ 342.047792][ T1070] do_syscall_64+0xfa/0x760 |
| [ 342.052299][ T1070] entry_SYSCALL_64_after_hwframe+0x49/0xbe |
| [ 342.058261][ T1070] RIP: 0033:0x459a59 |
| [ 342.062242][ T1070] Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <90> 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 |
| [ 342.081924][ T1070] RSP: 002b:00007f2916a46c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 |
| [ 342.090416][ T1070] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459a59 |
| [ 342.098476][ T1070] RDX: 0000000020000a00 RSI: 0000000000008914 RDI: 0000000000000008 |
| [ 342.106641][ T1070] RBP: 000000000075c070 R08: 0000000000000000 R09: 0000000000000000 |
| [ 342.114727][ T1070] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2916a476d4 |
| [ 342.122790][ T1070] R13: 00000000004cdab8 R14: 00000000004d7280 R15: 00000000ffffffff |
| [ 342.130878][ T1070] INFO: task syz-executor.2:11358 blocked for more than 144 seconds. |
| [ 342.139017][ T1070] Not tainted 5.4.0-rc1+ #0 |
| [ 342.144032][ T1070] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. |
| [ 342.153041][ T1070] syz-executor.2 D29712 11358 9045 0x00004004 |
| [ 342.159601][ T1070] Call Trace: |
| [ 342.163011][ T1070] __schedule+0x94f/0x1e70 |
| [ 342.182445][ T1070] schedule+0xd9/0x260 |
| [ 342.186768][ T1070] schedule_preempt_disabled+0x13/0x20 |
| [ 342.192260][ T1070] __mutex_lock+0x7b0/0x13c0 |
| [ 342.229368][ T1070] mutex_lock_nested+0x16/0x20 |
| [ 342.243372][ T1070] rtnl_lock+0x17/0x20 |
| [ 342.247502][ T1070] dev_ioctl+0x1a4/0xc60 |
| [ 342.251743][ T1070] sock_do_ioctl+0x1b7/0x2f0 |
| [ 342.274080][ T1070] sock_ioctl+0x3ed/0x780 |
| [ 342.288068][ T1070] do_vfs_ioctl+0xdb6/0x13e0 |
| [ 342.328606][ T1070] ksys_ioctl+0xab/0xd0 |
| [ 342.332786][ T1070] __x64_sys_ioctl+0x73/0xb0 |
| [ 342.337455][ T1070] do_syscall_64+0xfa/0x760 |
| [ 342.341961][ T1070] entry_SYSCALL_64_after_hwframe+0x49/0xbe |
| [ 342.347916][ T1070] RIP: 0033:0x459a59 |
| [ 342.351831][ T1070] Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <90> 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 |
| [ 342.372839][ T1070] RSP: 002b:00007f2916a25c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 |
| [ 342.381736][ T1070] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459a59 |
| [ 342.389858][ T1070] RDX: 0000000020000a00 RSI: 0000000000008914 RDI: 0000000000000008 |
| [ 342.398065][ T1070] RBP: 000000000075c118 R08: 0000000000000000 R09: 0000000000000000 |
| [ 342.406233][ T1070] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2916a266d4 |
| [ 342.414214][ T1070] R13: 00000000004cdab8 R14: 00000000004d7280 R15: 00000000ffffffff |
| [ 342.422298][ T1070] INFO: task syz-executor.5:11347 blocked for more than 144 seconds. |
| [ 342.430465][ T1070] Not tainted 5.4.0-rc1+ #0 |
| [ 342.435826][ T1070] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. |
| [ 342.444575][ T1070] syz-executor.5 D27808 11347 1 0x00000004 |
| [ 342.451109][ T1070] Call Trace: |
| [ 342.454395][ T1070] __schedule+0x94f/0x1e70 |
| [ 342.474047][ T1070] schedule+0xd9/0x260 |
| [ 342.478174][ T1070] schedule_preempt_disabled+0x13/0x20 |
| [ 342.483639][ T1070] __mutex_lock+0x7b0/0x13c0 |
| [ 342.525811][ T1070] mutex_lock_nested+0x16/0x20 |
| [ 342.535721][ T1070] rtnetlink_rcv_msg+0x40a/0xb00 |
| [ 342.561330][ T1070] netlink_rcv_skb+0x177/0x450 |
| [ 342.586580][ T1070] rtnetlink_rcv+0x1d/0x30 |
| [ 342.591008][ T1070] netlink_unicast+0x531/0x710 |
| [ 342.618357][ T1070] netlink_sendmsg+0x8a5/0xd60 |
| [ 342.656622][ T1070] sock_sendmsg+0xd7/0x130 |
| [ 342.661184][ T1070] __sys_sendto+0x262/0x380 |
| [ 342.715080][ T1070] __x64_sys_sendto+0xe1/0x1a0 |
| [ 342.719887][ T1070] do_syscall_64+0xfa/0x760 |
| [ 342.724392][ T1070] entry_SYSCALL_64_after_hwframe+0x49/0xbe |
| [ 342.730506][ T1070] RIP: 0033:0x4138a3 |
| [ 342.734517][ T1070] Code: f7 f6 4c 89 ea 4c 8d 68 ff 49 0f af f5 48 03 73 08 48 c1 ee 03 4c 89 f8 e9 3a fd ff ff 4d 89 e6 e9 21 fd ff ff 49 89 d3 49 89 <c5> 48 89 c8 4c 89 c1 e9 f3 fc ff ff 4d 8d 71 07 49 c1 ee 03 4d 8d |
| [ 342.754435][ T1070] RSP: 002b:00007ffc9c9a0e88 EFLAGS: 00000246 ORIG_RAX: 000000000000002c |
| [ 342.762947][ T1070] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004138a3 |
| [ 342.770981][ T1070] RDX: 0000000000000028 RSI: 0000000000a70070 RDI: 0000000000000003 |
| [ 342.779037][ T1070] RBP: 00007ffc9c9a0ef0 R08: 00007ffc9c9a0e90 R09: 000000000000000c |
| [ 342.787100][ T1070] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 |
| [ 342.795397][ T1070] R13: 00007ffc9c9a11f8 R14: 0000000000000000 R15: 0000000000000000 |
| [ 342.803965][ T1070] |
| [ 342.803965][ T1070] Showing all locks held in the system: |
| [ 342.811958][ T1070] 4 locks held by kworker/u4:0/7: |
| [ 342.817029][ T1070] #0: ffff8880a999be68 ((wq_completion)netns){+.+.}, at: process_one_work+0x88b/0x1740 |
| [ 342.826986][ T1070] #1: ffff8880a9897dc0 (net_cleanup_work){+.+.}, at: process_one_work+0x8c1/0x1740 |
| [ 342.836499][ T1070] #2: ffffffff89997088 (pernet_ops_rwsem){++++}, at: cleanup_net+0xae/0xa60 |
| [ 342.845276][ T1070] #3: ffffffff899a4320 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 |
| [ 342.853538][ T1070] 1 lock held by khungtaskd/1070: |
| [ 342.858617][ T1070] #0: ffffffff88faaf80 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e |
| [ 342.868133][ T1070] 2 locks held by getty/8997: |
| [ 342.872799][ T1070] #0: ffff88809c5a8b90 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 |
| [ 342.881777][ T1070] #1: ffffc90005f1d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 |
| [ 342.891418][ T1070] 2 locks held by getty/8998: |
| [ 342.896124][ T1070] #0: ffff88809b74aad0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 |
| [ 342.905082][ T1070] #1: ffffc90005f412e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 |
| [ 342.914822][ T1070] 2 locks held by getty/8999: |
| [ 342.919556][ T1070] #0: ffff88809c561350 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 |
| [ 342.928599][ T1070] #1: ffffc90005f212e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 |
| [ 342.938274][ T1070] 2 locks held by getty/9000: |
| [ 342.942965][ T1070] #0: ffff88808e085250 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 |
| [ 342.951976][ T1070] #1: ffffc90005f292e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 |
| [ 342.961798][ T1070] 2 locks held by getty/9001: |
| [ 342.966533][ T1070] #0: ffff888087bad390 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 |
| [ 342.975504][ T1070] #1: ffffc90005f352e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 |
| [ 342.985387][ T1070] 2 locks held by getty/9002: |
| [ 342.990256][ T1070] #0: ffff88809b74a250 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 |
| [ 342.999580][ T1070] #1: ffffc90005f3d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 |
| [ 343.009376][ T1070] 2 locks held by getty/9003: |
| [ 343.014179][ T1070] #0: ffff88808c518110 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 |
| [ 343.023207][ T1070] #1: ffffc90005f112e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 |
| [ 343.033016][ T1070] 3 locks held by kworker/1:4/9051: |
| [ 343.038406][ T1070] #0: ffff88809c8eabe8 ((wq_completion)ipv6_addrconf){+.+.}, at: process_one_work+0x88b/0x1740 |
| [ 343.048919][ T1070] #1: ffff888070f37dc0 ((addr_chk_work).work){+.+.}, at: process_one_work+0x8c1/0x1740 |
| [ 343.058826][ T1070] #2: ffffffff899a4320 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 |
| [ 343.067030][ T1070] 1 lock held by syz-executor.2/11340: |
| [ 343.072492][ T1070] #0: ffffffff899a4320 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 |
| [ 343.080648][ T1070] 1 lock held by syz-executor.2/11346: |
| [ 343.086307][ T1070] #0: ffffffff899a4320 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 |
| [ 343.094312][ T1070] 1 lock held by syz-executor.2/11358: |
| [ 343.100194][ T1070] #0: ffffffff899a4320 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 |
| [ 343.108528][ T1070] 1 lock held by syz-executor.5/11347: |
| [ 343.113991][ T1070] #0: ffffffff899a4320 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x40a/0xb00 |
| [ 343.122991][ T1070] |
| [ 343.125330][ T1070] ============================================= |
