INFO: task syz-executor.0:30049 blocked for more than 143 seconds. Not tainted 5.6.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28432 30049 8748 0x00004004 Call Trace: context_switch kernel/sched/core.c:3386 [inline] __schedule+0x87f/0xcd0 kernel/sched/core.c:4082 schedule+0x188/0x210 kernel/sched/core.c:4156 __lock_sock+0x15f/0x2a0 net/core/sock.c:2413 lock_sock_nested+0x7c/0x120 net/core/sock.c:2938 virtio_transport_release+0x5e/0xd20 net/vmw_vsock/virtio_transport_common.c:832 vsock_assign_transport+0x1e5/0x3b0 net/vmw_vsock/af_vsock.c:454 vsock_stream_connect+0x46d/0xb50 net/vmw_vsock/af_vsock.c:1288 __sys_connect_file net/socket.c:1857 [inline] __sys_connect+0x314/0x3a0 net/socket.c:1874 __do_sys_connect net/socket.c:1885 [inline] __se_sys_connect net/socket.c:1882 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:1882 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45c6c9 Code: 08 48 c7 44 24 10 00 00 00 00 48 89 74 24 18 48 89 7c 24 20 48 89 54 24 28 48 89 4c 24 30 0f 57 c0 0f 11 44 24 38 48 c7 44 24 <48> 00 00 00 00 e8 ad 53 ff ff 48 8b 44 24 50 48 8b 4c 24 58 48 89 RSP: 002b:00007f0f48219c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 00007f0f4821a6d4 RCX: 000000000045c6c9 RDX: 0000000000000010 RSI: 0000000020000240 RDI: 0000000000000003 RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000092 R14: 00000000004c3122 R15: 000000000076bf2c INFO: task syz-executor.0:30054 blocked for more than 143 seconds. Not tainted 5.6.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28632 30054 8748 0x00004004 Call Trace: context_switch kernel/sched/core.c:3386 [inline] __schedule+0x87f/0xcd0 kernel/sched/core.c:4082 schedule+0x188/0x210 kernel/sched/core.c:4156 __lock_sock+0x15f/0x2a0 net/core/sock.c:2413 lock_sock_nested+0x7c/0x120 net/core/sock.c:2938 virtio_transport_release+0x5e/0xd20 net/vmw_vsock/virtio_transport_common.c:832 vsock_assign_transport+0x1e5/0x3b0 net/vmw_vsock/af_vsock.c:454 vsock_stream_connect+0x46d/0xb50 net/vmw_vsock/af_vsock.c:1288 __sys_connect_file net/socket.c:1857 [inline] __sys_connect+0x314/0x3a0 net/socket.c:1874 __do_sys_connect net/socket.c:1885 [inline] __se_sys_connect net/socket.c:1882 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:1882 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45c6c9 Code: Bad RIP value. RSP: 002b:00007f0f481f8c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 00007f0f481f96d4 RCX: 000000000045c6c9 RDX: 0000000000000010 RSI: 0000000020000240 RDI: 0000000000000003 RBP: 000000000076bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000092 R14: 00000000004c3122 R15: 000000000076bfd4 INFO: task syz-executor.0:30057 blocked for more than 143 seconds. Not tainted 5.6.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D27944 30057 8748 0x00004004 Call Trace: context_switch kernel/sched/core.c:3386 [inline] __schedule+0x87f/0xcd0 kernel/sched/core.c:4082 schedule+0x188/0x210 kernel/sched/core.c:4156 __lock_sock+0x15f/0x2a0 net/core/sock.c:2413 lock_sock_nested+0x7c/0x120 net/core/sock.c:2938 lock_sock include/net/sock.h:1516 [inline] vsock_stream_setsockopt+0x9d/0x8c0 net/vmw_vsock/af_vsock.c:1547 __sys_setsockopt+0x582/0x720 net/socket.c:2130 __do_sys_setsockopt net/socket.c:2146 [inline] __se_sys_setsockopt net/socket.c:2143 [inline] __x64_sys_setsockopt+0xbf/0xd0 net/socket.c:2143 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45c6c9 Code: Bad RIP value. RSP: 002b:00007f0f481d7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f0f481d86d4 RCX: 000000000045c6c9 RDX: 0000000000000002 RSI: 0000000000000028 RDI: 0000000000000003 RBP: 000000000076c070 R08: 0000000000000008 R09: 0000000000000000 R10: 00000000200000c0 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000a2c R14: 00000000004d5b58 R15: 000000000076c07c Showing all locks held in the system: 1 lock held by khungtaskd/1097: #0: ffffffff892d98c8 (rcu_read_lock){....}, at: rcu_lock_acquire+0x4/0x30 include/linux/rcupdate.h:207 1 lock held by udevd/4311: 1 lock held by rsyslogd/8617: #0: ffff88809e083b60 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x279/0x310 fs/file.c:821 2 locks held by getty/8707: #0: ffff8880a7616090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:267 #1: ffffc9000174b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x22f/0x1bc0 drivers/tty/n_tty.c:2156 2 locks held by getty/8708: #0: ffff8880a90f3090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:267 #1: ffffc9000176b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x22f/0x1bc0 drivers/tty/n_tty.c:2156 2 locks held by getty/8709: #0: ffff88809faa3090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:267 #1: ffffc9000178b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x22f/0x1bc0 drivers/tty/n_tty.c:2156 2 locks held by getty/8710: #0: ffff88809d0b5090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:267 #1: ffffc900017ab2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x22f/0x1bc0 drivers/tty/n_tty.c:2156 2 locks held by getty/8711: #0: ffff888091b01090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:267 #1: ffffc9000179b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x22f/0x1bc0 drivers/tty/n_tty.c:2156 2 locks held by getty/8712: #0: ffff8880a3baf090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:267 #1: ffffc9000173b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x22f/0x1bc0 drivers/tty/n_tty.c:2156 2 locks held by getty/8713: #0: ffff8880a2491090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:267 #1: ffffc900016fb2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x22f/0x1bc0 drivers/tty/n_tty.c:2156 1 lock held by syz-executor.0/30049: #0: ffff888050e61110 (sk_lock-AF_VSOCK){+.+.}, at: lock_sock include/net/sock.h:1516 [inline] #0: ffff888050e61110 (sk_lock-AF_VSOCK){+.+.}, at: vsock_stream_connect+0x110/0xb50 net/vmw_vsock/af_vsock.c:1258 1 lock held by syz-executor.0/30054: #0: ffff888097b1d8d0 (sk_lock-AF_VSOCK){+.+.}, at: lock_sock include/net/sock.h:1516 [inline] #0: ffff888097b1d8d0 (sk_lock-AF_VSOCK){+.+.}, at: vsock_stream_connect+0x110/0xb50 net/vmw_vsock/af_vsock.c:1258 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1097 Comm: khungtaskd Not tainted 5.6.0-rc1-syzkaller #0 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+0x1fb/0x318 lib/dump_stack.c:118 nmi_cpu_backtrace+0xaa/0x190 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x16f/0x290 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x10/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace+0x17/0x20 include/linux/nmi.h:146 check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0xd40/0xd60 kernel/hung_task.c:289 kthread+0x332/0x350 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 CPU: 0 PID: 4311 Comm: udevd Not tainted 5.6.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x0/0x90 kernel/kcov.c:273 Code: 00 00 49 89 4c f2 08 48 c1 e0 03 48 83 c8 18 49 89 14 02 4d 89 44 f2 18 49 ff c1 4d 89 0a 5d c3 66 2e 0f 1f 84 00 00 00 00 00 <55> 48 89 e5 4c 8b 45 08 65 48 8b 04 25 c0 1d 02 00 65 8b 0d 64 1a RSP: 0018:ffffc900015d7ce8 EFLAGS: 00000246 RAX: 1ffffffff12d3c00 RBX: 0000000000000001 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc900015d7d80 R08: 0000000000000000 R09: fffffbfff12d3695 R10: fffffbfff12d3695 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8880a87f2400 R14: 0000000000000000 R15: ffffc900015d7d40 FS: 00007fdfde4f67a0(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c00cb43038 CR3: 0000000093d45000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ep_send_events fs/eventpoll.c:1766 [inline] ep_poll+0xb85/0xe70 fs/eventpoll.c:1903 do_epoll_wait+0x1e9/0x260 fs/eventpoll.c:2298 __do_sys_epoll_wait fs/eventpoll.c:2308 [inline] __se_sys_epoll_wait fs/eventpoll.c:2305 [inline] __x64_sys_epoll_wait+0x9a/0xb0 fs/eventpoll.c:2305 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fdfddc0a943 Code: 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 90 90 90 90 90 90 83 3d b5 dc 2a 00 00 75 13 49 89 ca b8 e8 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 34 c3 48 83 ec 08 e8 3b c4 00 00 48 89 04 24 RSP: 002b:00007ffff3858318 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8 RAX: ffffffffffffffda RBX: 0000000000000bb8 RCX: 00007fdfddc0a943 RDX: 0000000000000008 RSI: 00007ffff3858410 RDI: 000000000000000a RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000bb8 R11: 0000000000000246 R12: 0000000000000003 R13: 0000000000000000 R14: 00000000007ebbf0 R15: 00000000007e4250