INFO: task syz-executor.1:19542 blocked for more than 143 seconds. Not tainted 5.2.0+ #66 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28152 19542 9486 0x00000004 Call Trace: context_switch /kernel/sched/core.c:3252 [inline] __schedule+0x755/0x1580 /kernel/sched/core.c:3878 schedule+0xa8/0x270 /kernel/sched/core.c:3942 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:685 [inline] crypto_wait_req /./include/linux/crypto.h:680 [inline] tls_sw_free_resources_tx+0x513/0x6d0 /net/tls/tls_sw.c:2066 tls_sk_proto_close+0x369/0x6b0 /net/tls/tls_main.c:290 inet_release+0xed/0x200 /net/ipv4/af_inet.c:427 inet6_release+0x53/0x80 /net/ipv6/af_inet6.c:470 __sock_release+0xce/0x280 /net/socket.c:586 sock_close+0x1e/0x30 /net/socket.c:1264 __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+0x316/0x380 /arch/x86/entry/common.c:163 prepare_exit_to_usermode /arch/x86/entry/common.c:194 [inline] syscall_return_slowpath /arch/x86/entry/common.c:274 [inline] do_syscall_64+0x5a9/0x6a0 /arch/x86/entry/common.c:299 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x413501 Code: 39 0f 87 d1 03 00 00 49 89 f2 45 31 db 45 31 e4 eb 27 4d 8d 6b 08 44 0f b6 36 49 89 cf 4c 89 d9 49 d3 e6 48 83 f9 40 4c 89 f9 <4d> 19 ff 4d 21 f7 4d 09 fc 48 ff c6 4d 89 eb 4d 39 cb 72 d4 4c 89 RSP: 002b:00007ffecad5fe60 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000413501 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 0000000000000001 R08: 0000000000bd27b4 R09: 0000000000bd27b8 R10: 00007ffecad5ff40 R11: 0000000000000293 R12: 000000000075c9a0 R13: 000000000075c9a0 R14: 00000000007617d0 R15: ffffffffffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1048: #0: 0000000008bb4e4d (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e /kernel/locking/lockdep.c:5257 1 lock held by rsyslogd/9353: 2 locks held by getty/9443: #0: 0000000028a54076 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 /drivers/tty/tty_ldsem.c:341 #1: 00000000167b74c6 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 /drivers/tty/n_tty.c:2156 2 locks held by getty/9444: #0: 00000000e935c126 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 /drivers/tty/tty_ldsem.c:341 #1: 000000000070904c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 /drivers/tty/n_tty.c:2156 2 locks held by getty/9445: #0: 00000000051a9ab4 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 /drivers/tty/tty_ldsem.c:341 #1: 00000000548bd1db (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 /drivers/tty/n_tty.c:2156 2 locks held by getty/9446: #0: 0000000095d921b1 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 /drivers/tty/tty_ldsem.c:341 #1: 00000000ab3af7d3 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 /drivers/tty/n_tty.c:2156 2 locks held by getty/9447: #0: 00000000ebec2557 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 /drivers/tty/tty_ldsem.c:341 #1: 0000000002fd4806 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 /drivers/tty/n_tty.c:2156 2 locks held by getty/9448: #0: 00000000d6a647eb (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 /drivers/tty/tty_ldsem.c:341 #1: 00000000cc42c96f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 /drivers/tty/n_tty.c:2156 2 locks held by getty/9449: #0: 00000000561a4635 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 /drivers/tty/tty_ldsem.c:341 #1: 00000000922890bf (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 /drivers/tty/n_tty.c:2156 2 locks held by syz-executor.1/19542: #0: 000000003c2f413a (&sb->s_type->i_mutex_key#12){+.+.}, at: inode_lock /./include/linux/fs.h:778 [inline] #0: 000000003c2f413a (&sb->s_type->i_mutex_key#12){+.+.}, at: __sock_release+0x89/0x280 /net/socket.c:585 #1: 00000000e7d641a2 (sk_lock-AF_INET6){+.+.}, at: lock_sock /./include/net/sock.h:1522 [inline] #1: 00000000e7d641a2 (sk_lock-AF_INET6){+.+.}, at: tls_sk_proto_close+0xd7/0x6b0 /net/tls/tls_main.c:271 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1048 Comm: khungtaskd Not tainted 5.2.0+ #66 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+0x70/0xb2 /lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x23b/0x28b /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+0x9d0/0xef0 /kernel/hung_task.c:289 kthread+0x361/0x430 /kernel/kthread.c:255 ret_from_fork+0x24/0x30 /arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0xe/0x10 /./arch/x86/include/asm/irqflags.h:60