INFO: task syz-executor.0:12366 blocked for more than 143 seconds. Not tainted 5.1.0+ #13 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D26800 12366 31061 0x00004006 Call Trace: context_switch kernel/sched/core.c:2817 [inline] __schedule+0x7d1/0x1580 kernel/sched/core.c:3444 schedule+0xa8/0x260 kernel/sched/core.c:3508 schedule_timeout+0x717/0xc50 kernel/time/timer.c:1783 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x29c/0x440 kernel/sched/completion.c:136 crypto_wait_req include/linux/crypto.h:680 [inline] crypto_wait_req include/linux/crypto.h:675 [inline] tls_sw_free_resources_tx+0x51f/0x6e0 net/tls/tls_sw.c:2070 tls_sk_proto_close+0x5fa/0x780 net/tls/tls_main.c:289 inet_release+0x105/0x1f0 net/ipv4/af_inet.c:432 inet6_release+0x53/0x80 net/ipv6/af_inet6.c:474 __sock_release+0xd3/0x2b0 net/socket.c:607 sock_close+0x1b/0x30 net/socket.c:1279 __fput+0x302/0x890 fs/file_table.c:279 ____fput+0x16/0x20 fs/file_table.c:312 task_work_run+0x14a/0x1c0 kernel/task_work.c:113 get_signal+0x1ddd/0x2250 kernel/signal.c:2431 do_signal+0x87/0x1900 arch/x86/kernel/signal.c:815 exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:279 [inline] do_syscall_64+0x594/0x680 arch/x86/entry/common.c:304 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458da9 Code: 05 8c c9 45 00 48 89 04 24 48 c7 44 24 08 01 00 00 00 e8 6a 3e fd ff 48 8b 44 24 18 48 89 04 24 e8 0c 3d fd ff 48 8d 05 65 c9 <45> 00 48 89 04 24 48 c7 44 24 08 01 00 00 00 e8 43 3e fd ff 48 8b RSP: 002b:00007fadccaaec78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: 0000000001594000 RBX: 0000000000000006 RCX: 0000000000458da9 RDX: fffffffffffffee0 RSI: 00000000200005c0 RDI: 0000000000000003 RBP: 000000000073bf00 R08: 0000000000000000 R09: 00000000000000b6 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fadccaaf6d4 R13: 00000000004c684e R14: 00000000004db520 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1041: #0: 00000000c4f48e81 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:5148 2 locks held by getty/8929: #0: 0000000022ce79d2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000008c82d1b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/8930: #0: 000000003530bbf2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000db0f6387 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/8931: #0: 00000000d0a291a0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000082047251 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/8932: #0: 00000000dbb9186b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000010035b0a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/8933: #0: 00000000903da047 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000541762f5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/8934: #0: 000000009858d565 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000279e0bbc (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/8935: #0: 0000000073c91c8d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000cb6d5396 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by syz-executor.0/12366: #0: 00000000f9d8f2c7 (&sb->s_type->i_mutex_key#11){+.+.}, at: inode_lock include/linux/fs.h:778 [inline] #0: 00000000f9d8f2c7 (&sb->s_type->i_mutex_key#11){+.+.}, at: __sock_release+0x89/0x2b0 net/socket.c:606 #1: 0000000056bf0039 (sk_lock-AF_INET6){+.+.}, at: lock_sock include/net/sock.h:1525 [inline] #1: 0000000056bf0039 (sk_lock-AF_INET6){+.+.}, at: tls_sk_proto_close+0xd6/0x780 net/tls/tls_main.c:271 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1041 Comm: khungtaskd Not tainted 5.1.0+ #13 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:204 [inline] watchdog+0x9b7/0xec0 kernel/hung_task.c:288 kthread+0x357/0x430 kernel/kthread.c:253 ret_from_fork+0x3a/0x50 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