| TITLE: INFO: task hung in rtnl_lock |
| TYPE: HANG |
| |
| [ 702.091171] INFO: task syz-executor.4:15720 blocked for more than 140 seconds. |
| [ 702.098581] Not tainted 4.4.196+ #0 |
| [ 702.138127] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. |
| [ 702.180820] syz-executor.4 D ffff8801bc073040 27144 15720 2030 0x00000004 |
| [ 702.188314] ffff8801bc073040 ffff8800b9488d40 ffff8801bbad4840 ffff8801db61dd40 |
| [ 702.267645] ffff8801db61dd58 ffff8801bba979a0 ffffffff82a33b03 0000000000000246 |
| [ 702.346846] ffffffff832dc7a0 ffff8801bc073040 0000000000000000 00ff8801bc073818 |
| [ 702.425892] Call Trace: |
| [ 702.471280] [<ffffffff82a350bb>] schedule+0x9b/0x1c0 |
| [ 702.476501] [<ffffffff82a358a5>] schedule_preempt_disabled+0x15/0x20 |
| [ 702.519883] [<ffffffff82a39184>] mutex_lock_nested+0x3f4/0x1480 |
| [ 702.703168] [<ffffffff822d37bc>] rtnl_lock+0x1c/0x20 |
| [ 702.708393] [<ffffffff8284ef58>] ipv6_route_ioctl+0x1f8/0x2b0 |
| [ 702.801113] [<ffffffff827ff2a0>] inet6_ioctl+0x110/0x1c0 |
| [ 702.806685] [<ffffffff8223859f>] sock_do_ioctl+0x6f/0xb0 |
| [ 702.849029] [<ffffffff82238831>] sock_ioctl+0x251/0x3d0 |
| [ 702.897775] [<ffffffff8156c6c1>] do_vfs_ioctl+0xa41/0xfe0 |
| [ 703.037558] [<ffffffff8156ccf4>] SyS_ioctl+0x94/0xc0 |
| [ 703.079597] [<ffffffff82a491cf>] tracesys_phase2+0x90/0x95 |
| [ 703.121903] 1 lock held by syz-executor.4/15720: |
| [ 703.126701] #0: (rtnl_mutex){+.+.+.}, at: [<ffffffff822d37bc>] rtnl_lock+0x1c/0x20 |
| [ 703.205848] task PC stack pid father |
| [ 703.247701] kworker/0:1 D ffff8801d9358040 26968 30 2 0x00000000 |
| [ 703.326179] Workqueue: events proc_cleanup_work |
| [ 703.368060] ffff8801d9358040 0000000000000000 ffff8800b9fc6040 ffff8801db61dd40 |
| [ 703.448261] ffff8801db61dd58 ffff8801d9377858 ffffffff82a33b03 ffffffff00000000 |
| [ 703.527910] 0000000000120018[ 703.530883] net_ratelimit: 7720 callbacks suppressed |
| [ 704.018316] 1ffff1003b26ef08 ffff8800b9fc6040 00ff8801d93778c8 |
| [ 704.097007] Call Trace: |
| [ 704.142253] [<ffffffff82a350bb>] schedule+0x9b/0x1c0 |
| [ 704.147472] [<ffffffff82a46628>] schedule_timeout+0x3c8/0x690 |
| [ 704.332399] [<ffffffff82a37e71>] wait_for_completion+0x201/0x2d0 |
| [ 704.388784] [<ffffffff8123ee1c>] __wait_rcu_gp+0x14c/0x1d0 |
| [ 704.431545] [<ffffffff81244293>] synchronize_sched.part.0+0x83/0xa0 |
| [ 704.532530] [<ffffffff812486a8>] synchronize_sched+0xa8/0x130 |
| [ 704.538535] [<ffffffff8159530c>] kern_unmount+0x5c/0xd0 |
| [ 704.580535] [<ffffffff816891ec>] pid_ns_release_proc+0x3c/0x50 |
| [ 704.624111] [<ffffffff812e259e>] proc_cleanup_work+0x1e/0x30 |
| [ 704.630028] [<ffffffff8115ee3b>] process_one_work+0x7cb/0x15a0 |
| [ 704.722882] [<ffffffff81160141>] worker_thread+0x531/0x1010 |
| [ 704.777708] [<ffffffff8116e42d>] kthread+0x27d/0x310 |
| [ 705.018397] [<ffffffff82a494be>] ret_from_fork+0x4e/0x80 |
| [ 705.068308] kworker/0:2 D ffff8800b9fc6040 27400 433 2 0x00000000 |
| [ 705.146350] Workqueue: events proc_cleanup_work |
| [ 705.188269] ffff8800b9fc6040 0000000000000000 ffff8800a7c5c840 ffff8801db61dd40 |
| [ 705.267575] ffff8801db61dd58 ffff8800b9f27858 ffffffff82a33b03 ffffffff00000000 |
| [ 705.348023] 0000000000120018 1ffff100173e4f08 ffff8800a7c5c840 00ff8800b9f278c8 |
| [ 705.428313] Call Trace: |
| [ 705.467276] <Same stack as pid 30> |
| [ 705.506547] kworker/0:3 D ffff8801c6a93040 29592 2098 2 0x00000000 |
| [ 705.549561] Workqueue: events proc_cleanup_work |
| [ 705.591176] ffff8801c6a93040 0000000000000000 ffff8801bba86040 ffff8801db61dd40 |
| [ 705.599224] ffff8801db61dd58 ffff8801c605f858 ffffffff82a33b03 ffffffff00000000 |
| [ 705.679278] 0000000000120018 1ffff10038c0bf08 ffff8801bba86040 00ff8801c605f8c8 |
| [ 705.759116] Call Trace: |
| [ 705.797838] <Same stack as pid 30> |
| [ 705.837532] syz-executor.4 D ffff8801c3eec840 29320 4989 2030 0x00000002 |
| [ 705.916670] ffff8801c3eec840 0000000000000000 ffff8801d9c36040 ffff8801db61dd40 |
| [ 705.960191] ffff8801db61dd58 ffff8801c2a87770 ffffffff82a33b03 0000000000000246 |
| [ 706.076952] ffffffff832dc7a0 ffff8801c3eec840 0000000000000000 00ff8801c3eed018 |
| [ 706.156407] Call Trace: |
| [ 706.201971] [<ffffffff82a350bb>] schedule+0x9b/0x1c0 |
| [ 706.207219] [<ffffffff82a358a5>] schedule_preempt_disabled+0x15/0x20 |
| [ 706.251027] [<ffffffff82a39184>] mutex_lock_nested+0x3f4/0x1480 |
| [ 706.437235] [<ffffffff81380478>] perf_trace_destroy+0x28/0x100 |
| [ 706.480333] [<ffffffff813b59c6>] tp_perf_event_destroy+0x16/0x20 |
| [ 706.529630] [<ffffffff813d1dbe>] _free_event+0x25e/0xd70 |
| [ 706.572324] [<ffffffff813d2b37>] put_event+0x267/0x390 |
| [ 706.664382] [<ffffffff813d2cb7>] perf_release+0x37/0x50 |
| [ 706.669856] [<ffffffff815351ce>] __fput+0x24e/0x7a0 |
| [ 706.712164] [<ffffffff815357ab>] ____fput+0x1b/0x20 |
| [ 706.717307] [<ffffffff81169707>] task_work_run+0x207/0x2b0 |
| [ 706.759744] [<ffffffff811155b2>] do_exit+0x8d2/0x29c0 |
| [ 706.851813] [<ffffffff81117826>] do_group_exit+0x116/0x330 |
| [ 706.857576] [<ffffffff81139d06>] get_signal+0x396/0x1ca0 |
| [ 706.901069] [<ffffffff8100b532>] do_signal+0x92/0x17c0 |
| [ 707.087594] [<ffffffff81002950>] exit_to_usermode_loop+0xc0/0x150 |
| [ 707.130741] [<ffffffff8100541a>] syscall_return_slowpath+0x21a/0x260 |
| [ 707.137434] [<ffffffff82a491f9>] int_ret_from_sys_call+0x25/0xa3 |
| [ 707.180335] syz-executor.4 D ffff8801c3fa0040 29080 5725 2030 0x00000002 |
| [ 707.258728] ffff8801c3fa0040 0000000000000000 ffff8801da3d1840 ffff8801db61dd40 |
| [ 707.339410] ffff8801db61dd58 ffff8800bb72f770 ffffffff82a33b03 0000000000000246 |
| [ 707.419611] ffffffff832dc7a0 ffff8801c3fa0040 0000000000000000 00ff8801c3fa0818 |
| [ 707.500215] Call Trace: |
| [ 707.539066] <Same stack as pid 4989> |
| [ 707.578789] syz-executor.2 D ffff8801c1303040 29112 6109 2029 0x00000002 |
| [ 707.657675] ffff8801c1303040 0000000000000000 ffff8801c2171840 ffff8801db71dd40 |
| [ 707.738339] ffff8801db71dd58 ffff8800b961f810 ffffffff82a33b03 0000000000000246 |
| [ 707.817373] ffffffff832dc7a0 ffff8801c1303040 0000000000000000 00ff8801c1303818 |
| [ 707.898139] Call Trace: |
| [ 707.979988] [<ffffffff82a350bb>] schedule+0x9b/0x1c0 |
| [ 708.022301] [<ffffffff82a358a5>] schedule_preempt_disabled+0x15/0x20 |
| [ 708.028926] [<ffffffff82a39184>] mutex_lock_nested+0x3f4/0x1480 |
| [ 708.162451] [<ffffffff822d37bc>] rtnl_lock+0x1c/0x20 |
| [ 708.167665] [<ffffffff820838fe>] tun_chr_close+0x3e/0x60 |
| [ 708.210017] [<ffffffff815351ce>] __fput+0x24e/0x7a0 |
| [ 708.252037] [<ffffffff815357ab>] ____fput+0x1b/0x20 |
| [ 708.257169] [<ffffffff81169707>] task_work_run+0x207/0x2b0 |
| [ 708.299552] [<ffffffff811155b2>] do_exit+0x8d2/0x29c0 |
| [ 708.391636] [<ffffffff81117826>] do_group_exit+0x116/0x330 |
| [ 708.397376] [<ffffffff81139d06>] get_signal+0x396/0x1ca0 |
| [ 708.439563] [<ffffffff8100b532>] do_signal+0x92/0x17c0 |
| [ 709.009167] [<ffffffff81002950>] exit_to_usermode_loop+0xc0/0x150 |
| [ 709.052114] [<ffffffff8100541a>] syscall_return_slowpath+0x21a/0x260 |
| [ 709.058730] [<ffffffff82a491f9>] int_ret_from_sys_call+0x25/0xa3 |
| [ 709.101959] syz-executor.4 D ffff8801c2173040 28520 7596 2030 0x00000002 |
| [ 709.109484] ffff8801c2173040 0000000000000000 ffff8801da3d1840 ffff8801db61dd40 |
| [ 709.189245] ffff8801db61dd58 ffff8801c12bf598 ffffffff82a33b03 ffffffff00000000 |
| [ 709.269153] 1ffff10038257eaf ffff8801c12bf880 ffff8801c12bf600 00ffffff811ffa48 |
| [ 709.349148] Call Trace: |
| [ 709.429955] [<ffffffff82a350bb>] schedule+0x9b/0x1c0 |
| [ 709.472028] [<ffffffff82a46628>] schedule_timeout+0x3c8/0x690 |
| [ 709.620056] [<ffffffff82a37e71>] wait_for_completion+0x201/0x2d0 |
| [ 709.751089] [<ffffffff8123ee1c>] __wait_rcu_gp+0x14c/0x1d0 |
| [ 709.756832] [<ffffffff81244293>] synchronize_sched.part.0+0x83/0xa0 |
| [ 709.894299] [<ffffffff812486a8>] synchronize_sched+0xa8/0x130 |
| [ 709.900333] [<ffffffff8137f8b5>] perf_trace_event_unreg.isra.0+0xb5/0x1e0 |
| [ 709.944353] [<ffffffff81380511>] perf_trace_destroy+0xc1/0x100 |
| [ 709.950448] [<ffffffff813b59c6>] tp_perf_event_destroy+0x16/0x20 |
| [ 709.999890] [<ffffffff813d1dbe>] _free_event+0x25e/0xd70 |
| [ 710.049297] [<ffffffff813d2b37>] put_event+0x267/0x390 |
| [ 710.141579] [<ffffffff813d2cb7>] perf_release+0x37/0x50 |
| [ 710.147065] [<ffffffff815351ce>] __fput+0x24e/0x7a0 |
| [ 710.188676] [<ffffffff815357ab>] ____fput+0x1b/0x20 |
| [ 710.230857] [<ffffffff81169707>] task_work_run+0x207/0x2b0 |
| [ 710.236611] [<ffffffff811155b2>] do_exit+0x8d2/0x29c0 |
| [ 710.328349] [<ffffffff81117826>] do_group_exit+0x116/0x330 |
| [ 710.371187] [<ffffffff81139d06>] get_signal+0x396/0x1ca0 |
| [ 710.376760] [<ffffffff8100b532>] do_signal+0x92/0x17c0 |
| [ 710.560018] [<ffffffff81002950>] exit_to_usermode_loop+0xc0/0x150 |
| [ 710.603248] [<ffffffff8100541a>] syscall_return_slowpath+0x21a/0x260 |
| [ 710.610560] [<ffffffff82a491f9>] int_ret_from_sys_call+0x25/0xa3 |
| [ 710.692234] syz-executor.0 D ffff8801c138b040 29160 9727 2032 0x00000002 |
| [ 710.700026] ffff8801c138b040 0000000000000000 ffff8801c2a41840 ffff8801db71dd40 |
| [ 710.780194] ffff8801db71dd58 ffff8800a7f7f7a0 ffffffff82a33b03 0000000000000246 |
| [ 710.860167] ffffffff832dc7a0 ffff8801c138b040 0000000000000001 00ff8801c138b818 |
| [ 710.939597] Call Trace: |
| [ 711.020737] [<ffffffff82a350bb>] schedule+0x9b/0x1c0 |
| [ 711.025969] [<ffffffff82a358a5>] schedule_preempt_disabled+0x15/0x20 |
| [ 711.069526] [<ffffffff82a39184>] mutex_lock_nested+0x3f4/0x1480 |
| [ 711.167967] [<ffffffff822d37bc>] rtnl_lock+0x1c/0x20 |
| [ 711.209783] [<ffffffff828972c5>] ipv6_sock_mc_close+0xb5/0xf0 |
| [ 711.252724] [<ffffffff827fefe8>] inet6_release+0x48/0x80 |
| [ 711.258291] [<ffffffff8223822a>] __sock_release+0xda/0x2c0 |
| [ 711.307304] [<ffffffff82238430>] sock_close+0x20/0x30 |
| [ 711.349441] [<ffffffff815351ce>] __fput+0x24e/0x7a0 |
| [ 711.391570] [<ffffffff815357ab>] ____fput+0x1b/0x20 |
| [ 711.396712] [<ffffffff81169707>] task_work_run+0x207/0x2b0 |
| [ 711.439503] [<ffffffff811155b2>] do_exit+0x8d2/0x29c0 |
| [ 711.530713] [<ffffffff81117826>] do_group_exit+0x116/0x330 |
| [ 711.536464] [<ffffffff81139d06>] get_signal+0x396/0x1ca0 |
| [ 711.579118] [<ffffffff8100b532>] do_signal+0x92/0x17c0 |
| [ 711.727280] [<ffffffff81002950>] exit_to_usermode_loop+0xc0/0x150 |
| [ 711.770433] [<ffffffff8100541a>] syscall_return_slowpath+0x21a/0x260 |
| [ 711.817120] [<ffffffff82a491f9>] int_ret_from_sys_call+0x25/0xa3 |
| [ 711.860511] syz-executor.0 D ffff8800a7f88040 29400 9733 2032 0x00000002 |
| [ 711.939081] ffff8800a7f88040 0000000000000000 ffff8801c3d93040 ffff8801db71dd40 |
| [ 712.018817] ffff8801db71dd58 ffff8800a6f877a0 ffffffff82a33b03 0000000000000246 |
