[ 37.908051] audit: type=1800 audit(1539083304.810:22): pid=5697 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2447 res=0 [ 37.935939] audit: type=1800 audit(1539083304.810:23): pid=5697 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rsyslog" dev="sda1" ino=2442 res=0 [ 37.959087] audit: type=1800 audit(1539083304.810:24): pid=5697 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="sudo" dev="sda1" ino=2454 res=0 [....] 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. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.30' (ECDSA) to the list of known hosts. 2018/10/09 11:09:18 parsed 1 programs 2018/10/09 11:09:19 executed programs: 0 syzkaller login: [ 92.676838] IPVS: ftp: loaded support on port[0] = 21 [ 92.875836] bridge0: port 1(bridge_slave_0) entered blocking state [ 92.882529] bridge0: port 1(bridge_slave_0) entered disabled state [ 92.889390] device bridge_slave_0 entered promiscuous mode [ 92.904844] bridge0: port 2(bridge_slave_1) entered blocking state [ 92.911327] bridge0: port 2(bridge_slave_1) entered disabled state [ 92.918291] device bridge_slave_1 entered promiscuous mode [ 92.933437] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 92.948572] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 92.989195] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 93.006254] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 93.063753] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 93.071285] team0: Port device team_slave_0 added [ 93.085791] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 93.093064] team0: Port device team_slave_1 added [ 93.106835] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 93.127582] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 93.144207] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 93.160804] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 93.276888] bridge0: port 2(bridge_slave_1) entered blocking state [ 93.283379] bridge0: port 2(bridge_slave_1) entered forwarding state [ 93.290365] bridge0: port 1(bridge_slave_0) entered blocking state [ 93.296905] bridge0: port 1(bridge_slave_0) entered forwarding state [ 93.684125] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 93.690323] 8021q: adding VLAN 0 to HW filter on device bond0 [ 93.731605] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 93.773472] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 93.780960] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 93.824223] 8021q: adding VLAN 0 to HW filter on device team0 [ 95.035333] hrtimer: interrupt took 21448 ns 2018/10/09 11:09:25 executed programs: 10 [ 100.470026] cgroup: fork rejected by pids controller in /syz0 [ 103.503898] WARNING: CPU: 1 PID: 6286 at sound/core/seq/seq_ports.c:275 port_delete+0x177/0x1b0 [ 103.512759] Kernel panic - not syncing: panic_on_warn set ... [ 103.512759] [ 103.520121] CPU: 1 PID: 6286 Comm: syz-executor0 Not tainted 4.19.0-rc7+ #52 [ 103.527287] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 103.536640] Call Trace: [ 103.539214] dump_stack+0x1c4/0x2b4 [ 103.542852] ? dump_stack_print_info.cold.2+0x52/0x52 [ 103.548069] panic+0x238/0x4e7 [ 103.551258] ? add_taint.cold.5+0x16/0x16 [ 103.555393] ? __warn.cold.8+0x148/0x1ba [ 103.559438] ? __warn.cold.8+0x117/0x1ba [ 103.563486] ? port_delete+0x177/0x1b0 [ 103.567356] __warn.cold.8+0x163/0x1ba [ 103.571229] ? kfree+0xcf/0x230 [ 103.574490] ? port_delete+0x177/0x1b0 [ 103.578362] report_bug+0x254/0x2d0 [ 103.581974] do_error_trap+0x1fc/0x4d0 [ 103.586057] ? trace_hardirqs_on+0x310/0x310 [ 103.590483] ? math_error+0x3f0/0x3f0 [ 103.594327] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 103.599186] ? trace_hardirqs_on_caller+0x310/0x310 [ 103.604189] ? trace_hardirqs_on+0x310/0x310 [ 103.608579] ? debug_check_no_obj_freed+0x305/0x58d [ 103.613578] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 103.618408] do_invalid_op+0x1b/0x20 [ 103.622127] invalid_op+0x14/0x20 [ 103.625566] RIP: 0010:port_delete+0x177/0x1b0 [ 103.630066] Code: e3 99 fb 45 85 e4 75 14 e8 f6 e1 99 fb 48 89 df e8 6e 26 dd fb 31 c0 5b 41 5c 5d c3 e8 e2 e1 99 fb 0f 0b eb e3 e8 d9 e1 99 fb <0f> 0b eb 9b e8 20 52 dd fb eb bd e8 19 52 dd fb e9 77 ff ff ff e8 [ 103.648981] RSP: 0018:ffff8801c976f890 EFLAGS: 00010293 [ 103.654330] RAX: ffff8801b93406c0 RBX: ffff8801c875ad80 RCX: ffffffff85e4f351 [ 103.661579] RDX: 0000000000000000 RSI: ffffffff85e4f3b7 RDI: 0000000000000005 [ 103.668831] RBP: ffff8801c976f8a0 R08: ffff8801b93406c0 R09: 00000000d70829cb [ 103.676083] R10: 000000000455c6cf R11: 0000000000000000 R12: 0000000000000001 [ 103.683333] R13: ffff8801c875add0 R14: 1ffff100392edf20 R15: ffff8801cbdef3c0 [ 103.690596] ? port_delete+0x111/0x1b0 [ 103.694465] ? port_delete+0x177/0x1b0 [ 103.698339] snd_seq_delete_port+0x3cb/0x4a0 [ 103.702733] ? snd_seq_create_port+0x770/0x770 [ 103.707305] ? trace_hardirqs_on+0xbd/0x310 [ 103.711608] ? kasan_check_read+0x11/0x20 [ 103.715741] snd_seq_ioctl_delete_port+0xba/0x190 [ 103.720567] ? snd_seq_ioctl_set_port_info+0x120/0x120 [ 103.725831] snd_seq_kernel_client_ctl+0x15a/0x190 [ 103.730748] snd_seq_event_port_detach+0xfc/0x170 [ 103.735582] ? snd_seq_event_port_attach+0x360/0x360 [ 103.740689] ? kfree+0x1bf/0x230 [ 103.744048] ? snd_seq_info_done+0x30/0x30 [ 103.748269] delete_port+0x7d/0xc0 [ 103.751802] snd_seq_oss_release+0xf2/0x130 [ 103.756124] odev_release+0x52/0x70 [ 103.759746] __fput+0x385/0xa30 [ 103.763010] ? get_max_files+0x20/0x20 [ 103.766889] ? trace_hardirqs_on+0xbd/0x310 [ 103.771195] ? kasan_check_read+0x11/0x20 [ 103.775382] ? task_work_run+0x1af/0x2a0 [ 103.779439] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 103.784871] ? kasan_check_write+0x14/0x20 [ 103.789090] ? do_raw_spin_lock+0xc1/0x200 [ 103.793312] ____fput+0x15/0x20 [ 103.796577] task_work_run+0x1e8/0x2a0 [ 103.800455] ? task_work_cancel+0x240/0x240 [ 103.804762] ? copy_fd_bitmaps+0x210/0x210 [ 103.808983] exit_to_usermode_loop+0x318/0x380 [ 103.813549] ? syscall_slow_exit_work+0x520/0x520 [ 103.818379] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 103.823918] do_syscall_64+0x6be/0x820 [ 103.827806] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 103.833155] ? syscall_return_slowpath+0x5e0/0x5e0 [ 103.838080] ? trace_hardirqs_on_caller+0x310/0x310 [ 103.843080] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 103.848082] ? recalc_sigpending_tsk+0x180/0x180 [ 103.852817] ? kasan_check_write+0x14/0x20 [ 103.857056] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 103.861896] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 103.867073] RIP: 0033:0x457579 [ 103.870362] Code: 1d b4 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 eb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 103.889260] RSP: 002b:00007fb3adb9ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 103.896952] RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000457579 [ 103.904208] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 [ 103.911458] RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000 [ 103.918710] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb3adb9b6d4 [ 103.925963] R13: 00000000004ef912 R14: 00000000004cc460 R15: 00000000ffffffff [ 103.934271] Kernel Offset: disabled [ 103.937904] Rebooting in 86400 seconds..