[ 37.784774][ T27] audit: type=1800 audit(1554410732.579:27): pid=7553 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 37.816780][ T27] audit: type=1800 audit(1554410732.579:28): pid=7553 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. [ 38.587974][ T27] audit: type=1800 audit(1554410733.429:29): pid=7553 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 [ 38.613540][ T27] audit: type=1800 audit(1554410733.429:30): pid=7553 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 '10.128.10.19' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 48.897260][ T7704] BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor414/7704 [ 48.906838][ T7704] caller is ip6_finish_output+0x335/0xdc0 [ 48.912610][ T7704] CPU: 1 PID: 7704 Comm: syz-executor414 Not tainted 5.1.0-rc2+ #121 [ 48.920718][ T7704] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.930758][ T7704] Call Trace: [ 48.934045][ T7704] dump_stack+0x172/0x1f0 [ 48.938384][ T7704] __this_cpu_preempt_check+0x246/0x270 [ 48.943942][ T7704] ip6_finish_output+0x335/0xdc0 [ 48.948881][ T7704] ip6_output+0x235/0x7f0 [ 48.953216][ T7704] ? ip6_finish_output+0xdc0/0xdc0 [ 48.958310][ T7704] ? ip6_fragment+0x38b0/0x38b0 [ 48.963152][ T7704] ? kasan_check_read+0x11/0x20 [ 48.967979][ T7704] ip6_xmit+0xe41/0x20c0 [ 48.972220][ T7704] ? ip6_finish_output2+0x2550/0x2550 [ 48.977579][ T7704] ? mark_held_locks+0xf0/0xf0 [ 48.982334][ T7704] ? ip6_setup_cork+0x1870/0x1870 [ 48.987346][ T7704] sctp_v6_xmit+0x313/0x660 [ 48.991832][ T7704] sctp_packet_transmit+0x1bc4/0x36f0 [ 48.997224][ T7704] ? sctp_packet_config+0xfe0/0xfe0 [ 49.002406][ T7704] ? sctp_packet_append_chunk+0x946/0xda0 [ 49.008109][ T7704] ? sctp_outq_select_transport+0x21a/0x790 [ 49.013996][ T7704] sctp_outq_flush_ctrl.constprop.0+0x6d4/0xd50 [ 49.020220][ T7704] ? sctp_prsctp_prune_sent.isra.0+0x820/0x820 [ 49.026372][ T7704] ? lock_downgrade+0x880/0x880 [ 49.031230][ T7704] ? add_timer+0x450/0xbe0 [ 49.035625][ T7704] ? find_held_lock+0x35/0x130 [ 49.040369][ T7704] ? add_timer+0x463/0xbe0 [ 49.044763][ T7704] sctp_outq_flush+0xe8/0x2780 [ 49.049503][ T7704] ? mark_held_locks+0xa4/0xf0 [ 49.054277][ T7704] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 49.060078][ T7704] ? add_timer+0x463/0xbe0 [ 49.064469][ T7704] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 49.070251][ T7704] ? lockdep_hardirqs_on+0x418/0x5d0 [ 49.075548][ T7704] ? trace_hardirqs_on+0x67/0x230 [ 49.080584][ T7704] ? __sctp_outq_teardown+0xc60/0xc60 [ 49.085937][ T7704] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 49.092154][ T7704] ? sctp_outq_tail+0x68c/0x930 [ 49.096980][ T7704] sctp_outq_uncork+0x6c/0x80 [ 49.101650][ T7704] sctp_do_sm+0x559/0x53e0 [ 49.106048][ T7704] ? sctp_do_8_2_transport_strike.isra.0+0x940/0x940 [ 49.112719][ T7704] ? __local_bh_enable_ip+0x15a/0x270 [ 49.118071][ T7704] ? lock_downgrade+0x880/0x880 [ 49.122901][ T7704] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.129120][ T7704] ? kasan_check_read+0x11/0x20 [ 49.133950][ T7704] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.140185][ T7704] ? sctp_hash_transport+0x10b/0x18d0 [ 49.145551][ T7704] ? memcpy+0x46/0x50 [ 49.149514][ T7704] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.155760][ T7704] ? sctp_assoc_set_primary+0x274/0x310 [ 49.161313][ T7704] sctp_primitive_ASSOCIATE+0x9d/0xd0 [ 49.166673][ T7704] __sctp_connect+0x8cd/0xce0 [ 49.171338][ T7704] ? sctp_sendmsg_to_asoc+0x17b0/0x17b0 [ 49.176875][ T7704] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 49.183097][ T7704] ? sctp_get_port+0x10e/0x180 [ 49.187838][ T7704] ? sctp_get_port_local+0x1670/0x1670 [ 49.193274][ T7704] ? __local_bh_enable_ip+0x15a/0x270 [ 49.198624][ T7704] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 49.204496][ T7704] sctp_inet_connect+0x2a2/0x350 [ 49.209450][ T7704] __sys_connect+0x266/0x330 [ 49.214022][ T7704] ? __ia32_sys_accept+0xb0/0xb0 [ 49.218966][ T7704] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 49.224403][ T7704] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 49.229838][ T7704] ? do_syscall_64+0x26/0x610 [ 49.234491][ T7704] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.240538][ T7704] ? do_syscall_64+0x26/0x610 [ 49.245211][ T7704] __x64_sys_connect+0x73/0xb0 [ 49.249958][ T7704] do_syscall_64+0x103/0x610 [ 49.254532][ T7704] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.260400][ T7704] RIP: 0033:0x440189 [ 49.264299][ T7704] 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 [ 49.283895][ T7704] RSP: 002b:00007ffc10ab7138 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 49.292282][ T7704] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000