[ 28.797335] audit: type=1800 audit(1542315809.692:27): pid=5877 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 28.797360] audit: type=1800 audit(1542315809.692:28): pid=5877 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 29.478429] audit: type=1800 audit(1542315810.422:29): pid=5877 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 29.500396] audit: type=1800 audit(1542315810.422:30): pid=5877 uid=0 auid=4294967295 ses=4294967295 subj==unconfined 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 '10.128.10.6' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 37.407234] netlink: 'syz-executor298': attribute type 3 has an invalid length. [ 37.414785] netlink: 'syz-executor298': attribute type 2 has an invalid length. [ 37.422789] WARNING: CPU: 0 PID: 6032 at net/netfilter/nfnetlink_cttimeout.c:478 cttimeout_default_get+0x1df/0xb30 [ 37.433316] Kernel panic - not syncing: panic_on_warn set ... [ 37.439185] CPU: 0 PID: 6032 Comm: syz-executor298 Not tainted 4.20.0-rc2+ #336 [ 37.446612] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.455956] Call Trace: [ 37.458531] dump_stack+0x244/0x39d [ 37.462142] ? dump_stack_print_info.cold.1+0x20/0x20 [ 37.467319] panic+0x2ad/0x55c [ 37.470498] ? add_taint.cold.5+0x16/0x16 [ 37.474630] ? __warn.cold.8+0x5/0x45 [ 37.478426] ? __warn+0xe8/0x1d0 [ 37.481797] ? cttimeout_default_get+0x1df/0xb30 [ 37.486542] __warn.cold.8+0x20/0x45 [ 37.490254] ? rcu_softirq_qs+0x20/0x20 [ 37.494212] ? cttimeout_default_get+0x1df/0xb30 [ 37.498954] report_bug+0x254/0x2d0 [ 37.502569] do_error_trap+0x11b/0x200 [ 37.506439] do_invalid_op+0x36/0x40 [ 37.510139] ? cttimeout_default_get+0x1df/0xb30 [ 37.514884] invalid_op+0x14/0x20 [ 37.518319] RIP: 0010:cttimeout_default_get+0x1df/0xb30 [ 37.523672] Code: 00 0f 87 8d 00 00 00 41 80 ff 06 0f 84 94 07 00 00 41 80 ff 11 0f 84 6c 07 00 00 41 80 ff 01 0f 84 44 07 00 00 e8 91 f1 20 fb <0f> 0b 41 bd a1 ff ff ff eb 06 41 bd a1 ff ff ff e8 7c f1 20 fb 48 [ 37.542555] RSP: 0018:ffff8881b64c72b0 EFLAGS: 00010293 [ 37.547899] RAX: ffff8881c1686380 RBX: ffffffff88bf58e0 RCX: ffffffff865e961c [ 37.555154] RDX: 0000000000000000 RSI: ffffffff865e964f RDI: 0000000000000001 [ 37.562407] RBP: ffff8881b64c73c0 R08: ffff8881c1686380 R09: ffffed103b5c5b67 [ 37.569661] R10: 0000000000000002 R11: ffff8881dae2db3b R12: 0000000000000088 [ 37.576917] R13: ffff8881bf42b300 R14: 0000000000000000 R15: 0000000000000088 [ 37.584195] ? cttimeout_default_get+0x1ac/0xb30 [ 37.588939] ? cttimeout_default_get+0x1df/0xb30 [ 37.593682] ? lock_downgrade+0x900/0x900 [ 37.597819] ? check_preemption_disabled+0x48/0x280 [ 37.602833] ? cttimeout_new_timeout+0x8c0/0x8c0 [ 37.607591] ? __lock_is_held+0xb5/0x140 [ 37.611643] ? cttimeout_new_timeout+0x8c0/0x8c0 [ 37.616387] nfnetlink_rcv_msg+0xdd3/0x10c0 [ 37.620716] ? nfnetlink_bind+0x3b0/0x3b0 [ 37.624856] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.630378] ? refcount_sub_and_test_checked+0x203/0x310 [ 37.635832] ? refcount_inc_not_zero_checked+0x2f0/0x2f0 [ 37.641271] ? netlink_deliver_tap+0x32e/0xf80 [ 37.645835] ? lock_downgrade+0x900/0x900 [ 37.649968] ? check_preemption_disabled+0x48/0x280 [ 37.654998] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 37.660531] ? apparmor_capable+0x355/0x6c0 [ 37.664837] ? rcu_softirq_qs+0x20/0x20 [ 37.668798] ? apparmor_cred_transfer+0x590/0x590 [ 37.673622] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.679151] netlink_rcv_skb+0x172/0x440 [ 37.683194] ? nfnetlink_bind+0x3b0/0x3b0 [ 37.687323] ? netlink_ack+0xb80/0xb80 [ 37.691209] ? __netlink_ns_capable+0x100/0x130 [ 37.695866] nfnetlink_rcv+0x1c0/0x4d0 [ 37.699739] ? nfnetlink_rcv_batch+0x19b0/0x19b0 [ 37.704482] ? kasan_check_write+0x14/0x20 [ 37.708707] netlink_unicast+0x5a5/0x760 [ 37.712756] ? netlink_attachskb+0x9a0/0x9a0 [ 37.717146] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.722667] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 37.727772] netlink_sendmsg+0xa18/0xfc0 [ 37.731828] ? netlink_unicast+0x760/0x760 [ 37.736044] ? aa_sock_msg_perm.isra.14+0xba/0x160 [ 37.740957] ? apparmor_socket_sendmsg+0x29/0x30 [ 37.745695] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.751219] ? security_socket_sendmsg+0x94/0xc0 [ 37.755954] ? netlink_unicast+0x760/0x760 [ 37.760176] sock_sendmsg+0xd5/0x120 [ 37.763877] ___sys_sendmsg+0x7fd/0x930 [ 37.767835] ? find_held_lock+0x36/0x1c0 [ 37.771881] ? copy_msghdr_from_user+0x580/0x580 [ 37.776618] ? zap_class+0x640/0x640 [ 37.780321] ? zap_class+0x640/0x640 [ 37.784019] ? zap_class+0x640/0x640 [ 37.787713] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.793232] ? __fget_light+0x2e9/0x430 [ 37.797187] ? fget_raw+0x20/0x20 [ 37.800629] ? __do_page_fault+0x620/0xe60 [ 37.804853] ? lock_downgrade+0x900/0x900 [ 37.808987] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 37.813899] ? kasan_check_read+0x11/0x20 [ 37.818038] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 37.823561] ? sockfd_lookup_light+0xc5/0x160 [ 37.828039] __sys_sendmsg+0x11d/0x280 [ 37.831916] ? __ia32_sys_shutdown+0x80/0x80 [ 37.836310] ? up_read_non_owner+0x100/0x100 [ 37.840706] ? do_syscall_64+0x9a/0x820 [ 37.844663] ? do_syscall_64+0x9a/0x820 [ 37.848629] ? trace_hardirqs_off_caller+0x310/0x310 [ 37.853730] __x64_sys_sendmsg+0x78/0xb0 [ 37.857775] do_syscall_64+0x1b9/0x820 [ 37.861652] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 37.867033] ? syscall_return_slowpath+0x5e0/0x5e0 [ 37.871945] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.876770] ? trace_hardirqs_on_caller+0x310/0x310 [ 37.881770] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 37.886902] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.892425] ? prepare_exit_to_usermode+0x291/0x3b0 [ 37.897453] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.902339] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.907538] RIP: 0033:0x4400d9 [ 37.910715] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 37.929599] RSP: 002b:00007ffc704c30c8 EFLAGS: 00000213 ORIG_RAX: 000000000000002e [ 37.937287] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400d9 [ 37.944540] RDX: 0000000000000000 RSI: 0000000020dddfc8 RDI: 0000000000000003 [ 37.951794] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 37.959045] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401960 [ 37.966299] R13: 00000000004019f0 R14: 0000000000000000 R15: 0000000000000000 [ 37.974565] Kernel Offset: disabled [ 37.978228] Rebooting in 86400 seconds..