| TITLE: INFO: task hung in tls_sw_free_resources_tx |
| TYPE: HANG |
| |
| [ 412.216359] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. |
| [ 567.074029] INFO: task syz-executor925:7871 blocked for more than 140 seconds. |
| [ 567.081703] Not tainted 4.20.0-rc7+ #360 |
| [ 567.086435] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. |
| [ 567.094451] syz-executor925 D19912 7871 7870 0x00000004 |
| [ 567.100074] Call Trace: |
| [ 567.102785] __schedule+0x86c/0x1ed0 |
| [ 567.140546] schedule+0xfe/0x460 |
| [ 567.156318] schedule_timeout+0x1cc/0x260 |
| [ 567.174621] wait_for_completion+0x427/0x8a0 |
| [ 567.212980] __flush_work+0x59c/0x9b0 |
| [ 567.239230] __cancel_work_timer+0x4ba/0x820 |
| [ 567.315274] cancel_delayed_work_sync+0x1a/0x20 |
| [ 567.319959] tls_sw_free_resources_tx+0x1df/0xcf0 |
| [ 567.373036] tls_sk_proto_close+0x602/0x750 |
| [ 567.399879] inet_release+0x104/0x1f0 |
| [ 567.403680] inet6_release+0x50/0x70 |
| [ 567.407457] __sock_release+0xd7/0x250 |
| [ 567.415575] sock_close+0x19/0x20 |
| [ 567.419031] __fput+0x385/0xa30 |
| [ 567.448180] ____fput+0x15/0x20 |
| [ 567.451455] task_work_run+0x1e8/0x2a0 |
| [ 567.468113] exit_to_usermode_loop+0x318/0x380 |
| [ 567.483281] do_syscall_64+0x6be/0x820 |
| [ 567.522478] entry_SYSCALL_64_after_hwframe+0x49/0xbe |
| [ 567.527707] RIP: 0033:0x401010 |
| [ 567.530892] Code: 01 f0 ff ff 0f 83 b0 0a 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d bd 16 2d 00 00 75 14 b8 03 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 84 0a 00 00 c3 48 83 ec 08 e8 3a 01 00 00 |
| [ 567.550123] RSP: 002b:00007ffec7856f48 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 |
| [ 567.557879] RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000401010 |
| [ 567.565363] RDX: 00000000e0ffffff RSI: 00000000200005c0 RDI: 0000000000000004 |
| [ 567.572728] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 |
| [ 567.580090] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401f20 |
| [ 567.587387] R13: 0000000000401fb0 R14: 0000000000000000 R15: 0000000000000000 |
| [ 567.594859] |
| [ 567.594859] Showing all locks held in the system: |
| [ 567.601353] 2 locks held by kworker/0:0/5: |
| [ 567.605664] #0: 000000006d11dec0 ((wq_completion)"events"){+.+.}, at: process_one_work+0xb43/0x1c40 |
| [ 567.614974] #1: 00000000ccfe6c9a ((work_completion)(&(&sw_ctx_tx->tx_work.work)->work)){+.+.}, at: process_one_work+0xb9a/0x1c40 |
| [ 567.626991] 1 lock held by khungtaskd/1014: |
| [ 567.631430] #0: 00000000153ed952 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 |
| [ 567.640306] 1 lock held by rsyslogd/7757: |
| [ 567.644474] #0: 0000000034b64696 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 |
| [ 567.652538] 2 locks held by getty/7847: |
| [ 567.656559] #0: 00000000d063ffb7 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 |
| [ 567.664966] #1: 0000000045d4d183 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 |
| [ 567.673825] 2 locks held by getty/7848: |
| [ 567.677841] #0: 00000000dda11696 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 |
| [ 567.686109] #1: 00000000a02eb135 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 |
| [ 567.695018] 2 locks held by getty/7849: |
| [ 567.699082] #0: 0000000013f4e4e1 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 |
| [ 567.707370] #1: 00000000f6bb4c99 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 |
| [ 567.716493] 2 locks held by getty/7850: |
| [ 567.720453] #0: 00000000daef1117 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 |
| [ 567.728782] #1: 00000000229b8dfc (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 |
| [ 567.737761] 2 locks held by getty/7851: |
| [ 567.741733] #0: 000000005093d448 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 |
| [ 567.750028] #1: 00000000bca705ed (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 |
| [ 567.759024] 2 locks held by getty/7852: |
| [ 567.762988] #0: 000000000f124289 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 |
| [ 567.771272] #1: 00000000a9adbb34 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 |
| [ 567.780138] 2 locks held by getty/7853: |
| [ 567.784144] #0: 0000000027476b58 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 |
| [ 567.792501] #1: 000000007cc578ce (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 |
| [ 567.801504] 2 locks held by syz-executor925/7871: |
| [ 567.806376] #0: 00000000997b6df5 (&sb->s_type->i_mutex_key#11){+.+.}, at: __sock_release+0x8b/0x250 |
| [ 567.815700] #1: 00000000af711cb5 (sk_lock-AF_INET6){+.+.}, at: wait_on_pending_writer+0x27c/0x5b0 |
| [ 567.824943] |
| [ 567.826555] ============================================= |
| [ 567.826555] |
| [ 567.833648] NMI backtrace for cpu 1 |
| [ 567.837320] CPU: 1 PID: 1014 Comm: khungtaskd Not tainted 4.20.0-rc7+ #360 |
| [ 567.844322] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 |
| [ 567.853661] Call Trace: |
| [ 567.856235] dump_stack+0x1d3/0x2c6 |
| [ 567.875816] nmi_cpu_backtrace.cold.4+0x63/0xa2 |
| [ 567.885651] nmi_trigger_cpumask_backtrace+0x1c2/0x22c |
| [ 567.891018] arch_trigger_cpumask_backtrace+0x14/0x20 |
| [ 567.896210] watchdog+0xb51/0x1060 |
| [ 567.964872] kthread+0x35a/0x440 |
| [ 567.972106] ret_from_fork+0x3a/0x50 |
| [ 567.975949] Sending NMI from CPU 1 to CPUs 0: |
| [ 567.980545] NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0x6/0x10 |
| [ 567.981465] Kernel panic - not syncing: hung_task: blocked tasks |
| [ 567.994235] CPU: 1 PID: 1014 Comm: khungtaskd Not tainted 4.20.0-rc7+ #360 |
| [ 568.001245] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 |
| [ 568.010586] Call Trace: |
| [ 568.013187] dump_stack+0x1d3/0x2c6 |
| [ 568.026040] panic+0x2ad/0x55c |
| [ 568.049975] watchdog+0xb62/0x1060 |
| [ 568.119000] kthread+0x35a/0x440 |
| [ 568.126213] ret_from_fork+0x3a/0x50 |
| [ 568.130955] Kernel Offset: disabled |
| [ 568.134651] Rebooting in 86400 seconds.. |
