[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 26.830657] kauditd_printk_skb: 8 callbacks suppressed [ 26.830669] audit: type=1800 audit(1540130478.857:29): pid=5242 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 26.864916] audit: type=1800 audit(1540130478.857:30): pid=5242 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.27' (ECDSA) to the list of known hosts. 2018/10/21 14:01:47 parsed 1 programs 2018/10/21 14:01:48 executed programs: 0 syzkaller login: [ 56.404241] IPVS: ftp: loaded support on port[0] = 21 [ 56.659673] bridge0: port 1(bridge_slave_0) entered blocking state [ 56.666249] bridge0: port 1(bridge_slave_0) entered disabled state [ 56.673637] device bridge_slave_0 entered promiscuous mode [ 56.691698] bridge0: port 2(bridge_slave_1) entered blocking state [ 56.698157] bridge0: port 2(bridge_slave_1) entered disabled state [ 56.705608] device bridge_slave_1 entered promiscuous mode [ 56.722927] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 56.740776] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 56.789981] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 56.810796] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 56.885551] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 56.892811] team0: Port device team_slave_0 added [ 56.909557] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 56.916814] team0: Port device team_slave_1 added [ 56.934191] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 56.953978] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 56.975499] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 56.995321] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 57.142126] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.148620] bridge0: port 2(bridge_slave_1) entered forwarding state [ 57.155451] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.161796] bridge0: port 1(bridge_slave_0) entered forwarding state [ 57.680050] 8021q: adding VLAN 0 to HW filter on device bond0 [ 57.733383] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 57.785682] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 57.791829] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 57.799437] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 57.851087] 8021q: adding VLAN 0 to HW filter on device team0 2018/10/21 14:01:53 executed programs: 146 2018/10/21 14:01:58 executed programs: 366 2018/10/21 14:02:03 executed programs: 587 2018/10/21 14:02:08 executed programs: 802 2018/10/21 14:02:13 executed programs: 1010 2018/10/21 14:02:18 executed programs: 1221 2018/10/21 14:02:23 executed programs: 1440 2018/10/21 14:02:28 executed programs: 1663 2018/10/21 14:02:33 executed programs: 1881 2018/10/21 14:02:38 executed programs: 2098 2018/10/21 14:02:43 executed programs: 2319 2018/10/21 14:02:48 executed programs: 2532 [ 121.163909] kasan: CONFIG_KASAN_INLINE enabled [ 121.168744] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 121.177296] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 121.183540] CPU: 0 PID: 16902 Comm: syz-executor0 Not tainted 4.19.0-rc8+ #72 [ 121.190810] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 121.200171] RIP: 0010:n_tty_flush_buffer+0x64/0x260 [ 121.205180] Code: 80 3c 02 00 0f 85 d0 01 00 00 49 8b 9c 24 70 05 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb 60 22 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 9c 01 00 00 48 c7 83 60 22 00 00 00 00 00 00 48 [ 121.224066] RSP: 0018:ffff8801c6f37780 EFLAGS: 00010202 [ 121.229413] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 121.236667] RDX: 000000000000044c RSI: 0000000000000000 RDI: 0000000000002260 [ 121.243921] RBP: ffff8801c6f37798 R08: ffff8801b9734af0 R09: 0000000000000002 [ 121.251216] R10: ffff8801b9734ad0 R11: 2c77dc48a4aa5556 R12: ffff8801ba822980 [ 121.258487] R13: ffff8801ba822bb8 R14: 0000000000000000 R15: ffff8801c6f377e8 [ 121.265745] FS: 00007f0847168700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 121.273993] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 121.279859] CR2: 0000000001b13e80 CR3: 00000001d303c000 CR4: 00000000001406f0 [ 121.287119] Call Trace: [ 121.289701] set_termios+0x390/0x7d0 [ 121.293401] ? n_tty_kick_worker+0x230/0x230 [ 121.297795] ? tty_perform_flush+0x80/0x80 [ 121.302034] tty_mode_ioctl+0x268/0xb40 [ 121.305994] ? mark_held_locks+0x130/0x130 [ 121.310217] ? set_termios+0x7d0/0x7d0 [ 121.314110] ? tty_kref_put.part.14+0x88/0x260 [ 121.318696] ? ___might_sleep+0x1ed/0x300 [ 121.322832] ? arch_local_save_flags+0x40/0x40 [ 121.327402] n_tty_ioctl_helper+0x54/0x3b0 [ 121.331629] n_tty_ioctl+0x54/0x360 [ 121.335242] ? ldsem_down_read+0x32/0x40 [ 121.339290] ? ldsem_down_read+0x32/0x40 [ 121.343340] tty_ioctl+0x5ad/0x1820 [ 121.346964] ? commit_echoes+0x1c0/0x1c0 [ 121.351032] ? tty_vhangup+0x30/0x30 [ 121.354735] ? rcu_bh_qs+0xc0/0xc0 [ 121.358281] ? __fget+0x4d1/0x740 [ 121.361726] ? ksys_dup3+0x680/0x680 [ 121.365428] ? __might_fault+0x12b/0x1e0 [ 121.369478] ? lock_downgrade+0x900/0x900 [ 121.373612] ? lock_release+0x970/0x970 [ 121.377571] ? arch_local_save_flags+0x40/0x40 [ 121.382153] ? tty_vhangup+0x30/0x30 [ 121.385861] do_vfs_ioctl+0x1de/0x1720 [ 121.389750] ? ioctl_preallocate+0x300/0x300 [ 121.394145] ? memset+0x31/0x40 [ 121.397417] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 121.402941] ? smack_file_ioctl+0x210/0x3c0 [ 121.407248] ? fget_raw+0x20/0x20 [ 121.410690] ? smack_file_lock+0x2e0/0x2e0 [ 121.414918] ? do_syscall_64+0x9a/0x820 [ 121.418875] ? do_syscall_64+0x9a/0x820 [ 121.422859] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 121.428392] ? security_file_ioctl+0x94/0xc0 [ 121.432787] ksys_ioctl+0xa9/0xd0 [ 121.436234] __x64_sys_ioctl+0x73/0xb0 [ 121.440125] do_syscall_64+0x1b9/0x820 [ 121.444007] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 121.449360] ? syscall_return_slowpath+0x5e0/0x5e0 [ 121.454280] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 121.459109] ? trace_hardirqs_on_caller+0x310/0x310 [ 121.464110] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 121.469114] ? prepare_exit_to_usermode+0x291/0x3b0 [ 121.474117] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 121.478948] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 121.484120] RIP: 0033:0x457569 [ 121.487301] Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 121.506205] RSP: 002b:00007f0847167c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 121.513907] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569 [ 121.521173] RDX: 0000000020000000 RSI: 0000000000005404 RDI: 0000000000000005 [ 121.528439] RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 [ 121.535696] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f08471686d4 [ 121.542984] R13: 00000000004c0da4 R14: 00000000004d17d0 R15: 00000000ffffffff [ 121.550256] Modules linked in: [ 121.554749] ---[ end trace 37af29c317948c3e ]--- [ 121.559536] RIP: 0010:n_tty_flush_buffer+0x64/0x260 [ 121.564615] Code: 80 3c 02 00 0f 85 d0 01 00 00 49 8b 9c 24 70 05 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb 60 22 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 9c 01 00 00 48 c7 83 60 22 00 00 00 00 00 00 48 [ 121.583588] RSP: 0018:ffff8801c6f37780 EFLAGS: 00010202 [ 121.588973] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 121.596286] RDX: 000000000000044c RSI: 0000000000000000 RDI: 0000000000002260 [ 121.603609] RBP: ffff8801c6f37798 R08: ffff8801b9734af0 R09: 0000000000000002 [ 121.611067] R10: ffff8801b9734ad0 R11: 2c77dc48a4aa5556 R12: ffff8801ba822980 [ 121.618638] R13: ffff8801ba822bb8 R14: 0000000000000000 R15: ffff8801c6f377e8 [ 121.625976] FS: 00007f0847168700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 121.634281] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 121.640177] CR2: 0000000001b13e80 CR3: 00000001d303c000 CR4: 00000000001406f0 [ 121.647490] Kernel panic - not syncing: Fatal exception [ 121.653719] Kernel Offset: disabled [ 121.657343] Rebooting in 86400 seconds..