INFO: task syz-executor.2:19632 blocked for more than 143 seconds. Not tainted 5.0.0+ #135 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D27512 19632 17787 0x00000004 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 schedule_timeout+0x8ca/0xfd0 kernel/time/timer.c:1779 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_sendmsg+0x13a6/0x17b0 net/tls/tls_sw.c:1057 inet_sendmsg+0x147/0x5d0 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xdd/0x130 net/socket.c:661 __sys_sendto+0x262/0x380 net/socket.c:1932 __do_sys_sendto net/socket.c:1944 [inline] __se_sys_sendto net/socket.c:1940 [inline] __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1940 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458209 Code: 4c 24 08 48 c7 44 24 10 00 00 00 00 48 89 54 24 18 e8 ab 9f ff ff 48 8b 6c 24 20 48 83 c4 28 c3 e8 ac 1c 00 00 eb aa cc cc cc cc cc cc cc cc cc 64 48 8b 0c 25 f8 ff ff ff 48 3b 61 10 76 40 RSP: 002b:00007fe425b91c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000458209 RDX: 0000000000000001 RSI: 0000000020000000 RDI: 0000000000000003 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000004000 R11: 0000000000000246 R12: 00007fe425b926d4 R13: 00000000004c58c4 R14: 00000000004d9850 R15: 00000000ffffffff INFO: task syz-executor.2:19638 blocked for more than 143 seconds. Not tainted 5.0.0+ #135 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28304 19638 17787 0x00000004 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 __lock_sock+0x165/0x290 net/core/sock.c:2389 lock_sock_nested+0xfe/0x120 net/core/sock.c:2914 lock_sock include/net/sock.h:1513 [inline] inet_csk_accept+0xa0/0xc10 net/ipv4/inet_connection_sock.c:449 inet_accept+0x101/0x8c0 net/ipv4/af_inet.c:734 __sys_accept4+0x350/0x6a0 net/socket.c:1734 __do_sys_accept4 net/socket.c:1769 [inline] __se_sys_accept4 net/socket.c:1766 [inline] __x64_sys_accept4+0x97/0xf0 net/socket.c:1766 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458209 Code: 4c 24 08 48 c7 44 24 10 00 00 00 00 48 89 54 24 18 e8 ab 9f ff ff 48 8b 6c 24 20 48 83 c4 28 c3 e8 ac 1c 00 00 eb aa cc cc cc cc cc cc cc cc cc 64 48 8b 0c 25 f8 ff ff ff 48 3b 61 10 76 40 RSP: 002b:00007fe425b70c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000120 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000458209 RDX: 0000000020000180 RSI: 0000000020000140 RDI: 0000000000000003 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000080000 R11: 0000000000000246 R12: 00007fe425b716d4 R13: 00000000004bdfe8 R14: 00000000004ce408 R15: 00000000ffffffff INFO: task syz-executor.2:19645 blocked for more than 143 seconds. Not tainted 5.0.0+ #135 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28504 19645 17787 0x00000006 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 schedule_timeout+0x8ca/0xfd0 kernel/time/timer.c:1779 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_sendmsg+0x13a6/0x17b0 net/tls/tls_sw.c:1057 inet_sendmsg+0x147/0x5d0 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xdd/0x130 net/socket.c:661 __sys_sendto+0x262/0x380 net/socket.c:1932 __do_sys_sendto net/socket.c:1944 [inline] __se_sys_sendto net/socket.c:1940 [inline] __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1940 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458209 Code: 4c 24 08 48 c7 44 24 10 00 00 00 00 48 89 54 24 18 e8 ab 9f ff ff 48 8b 6c 24 20 48 83 c4 28 c3 e8 ac 1c 00 00 eb aa cc cc cc cc cc cc cc cc cc 64 48 8b 0c 25 f8 ff ff ff 48 3b 61 10 76 40 RSP: 002b:00007fe425b4fc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000458209 RDX: 0000000000000001 RSI: 0000000020000000 RDI: 0000000000000005 RBP: 000000000073c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000004000 R11: 0000000000000246 R12: 00007fe425b506d4 R13: 00000000004c58c4 R14: 00000000004d9850 R15: 00000000ffffffff INFO: task syz-executor.2:19676 blocked for more than 144 seconds. Not tainted 5.0.0+ #135 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D30120 19676 17787 0x00000004 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 __lock_sock+0x165/0x290 net/core/sock.c:2389 lock_sock_nested+0xfe/0x120 net/core/sock.c:2914 lock_sock include/net/sock.h:1513 [inline] inet_csk_accept+0xa0/0xc10 net/ipv4/inet_connection_sock.c:449 inet_accept+0x101/0x8c0 net/ipv4/af_inet.c:734 __sys_accept4+0x350/0x6a0 net/socket.c:1734 __do_sys_accept4 net/socket.c:1769 [inline] __se_sys_accept4 net/socket.c:1766 [inline] __x64_sys_accept4+0x97/0xf0 net/socket.c:1766 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458209 Code: 4c 24 08 48 c7 44 24 10 00 00 00 00 48 89 54 24 18 e8 ab 9f ff ff 48 8b 6c 24 20 48 83 c4 28 c3 e8 ac 1c 00 00 eb aa cc cc cc cc cc cc cc cc cc 64 48 8b 0c 25 f8 ff ff ff 48 3b 61 10 76 40 RSP: 002b:00007fe425b0dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000120 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000458209 RDX: 0000000020000180 RSI: 0000000020000140 RDI: 0000000000000005 RBP: 000000000073c180 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000080000 R11: 0000000000000246 R12: 00007fe425b0e6d4 R13: 00000000004bdfe8 R14: 00000000004ce408 R15: 00000000ffffffff Showing all locks held in the system: 3 locks held by kworker/u4:0/7: 1 lock held by khungtaskd/1040: #0: 00000000eb85eda5 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:5061 2 locks held by getty/7745: #0: 000000002f8dc0e1 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000b2ae6650 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7746: #0: 00000000e93b9f84 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000096a737c7 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7747: #0: 0000000015de5511 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000065b486c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7748: #0: 000000008a427cd3 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000d0685800 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7749: #0: 00000000c3c28978 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000007f7b90ee (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7750: #0: 0000000002c8c80e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000088aa9ab1 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7751: #0: 00000000418adda7 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000db269904 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 1 lock held by syz-executor.2/19632: #0: 0000000018d424f6 (sk_lock-AF_INET6){+.+.}, at: lock_sock include/net/sock.h:1513 [inline] #0: 0000000018d424f6 (sk_lock-AF_INET6){+.+.}, at: tls_sw_sendmsg+0x25d/0x17b0 net/tls/tls_sw.c:885 1 lock held by syz-executor.2/19645: #0: 00000000f182e3f8 (sk_lock-AF_INET6){+.+.}, at: lock_sock include/net/sock.h:1513 [inline] #0: 00000000f182e3f8 (sk_lock-AF_INET6){+.+.}, at: tls_sw_sendmsg+0x25d/0x17b0 net/tls/tls_sw.c:885 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1040 Comm: khungtaskd Not tainted 5.0.0+ #135 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: