[ 31.401636] audit: type=1800 audit(1563574104.674:33): pid=6850 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed(directio)" comm="startpar" name="rc.local" dev="sda1" ino=2465 res=0 [ 31.431318] audit: type=1800 audit(1563574104.674:34): pid=6850 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed(directio)" comm="startpar" name="rmnologin" dev="sda1" ino=2456 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 40.780373] random: sshd: uninitialized urandom read (32 bytes read) [ 41.223115] audit: type=1400 audit(1563574114.494:35): avc: denied { map } for pid=7023 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 [ 41.276565] random: sshd: uninitialized urandom read (32 bytes read) [ 41.873019] random: sshd: uninitialized urandom read (32 bytes read) [ 42.062404] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.141' (ECDSA) to the list of known hosts. [ 47.674259] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 47.794170] audit: type=1400 audit(1563574121.064:36): avc: denied { map } for pid=7035 comm="syz-executor258" path="/root/syz-executor258361758" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 47.797547] netlink: 4 bytes leftover after parsing attributes in process `syz-executor258'. [ 47.829918] kasan: CONFIG_KASAN_INLINE enabled [ 47.834639] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 47.842334] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 47.848599] Modules linked in: [ 47.851779] CPU: 1 PID: 7035 Comm: syz-executor258 Not tainted 4.14.133 #28 [ 47.858903] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.868244] task: ffff888082d9a600 task.stack: ffff8880810a0000 [ 47.874438] RIP: 0010:tcf_ife_init+0x1b3/0x1310 [ 47.879089] RSP: 0018:ffff8880810a7230 EFLAGS: 00010246 [ 47.884436] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff110105b35ce [ 47.891696] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000282 [ 47.898942] RBP: ffff8880810a7378 R08: ffff888082d9a600 R09: 0000000000000001 [ 47.906195] R10: 0000000000000000 R11: ffff888082d9a600 R12: 000000000000001f [ 47.913488] R13: ffff88809b606dc0 R14: ffff8880810a7350 R15: 0000000000000000 [ 47.920746] FS: 0000000001b43880(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000 [ 47.928958] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 47.935028] CR2: 0000000020000180 CR3: 000000008e42d000 CR4: 00000000001406e0 [ 47.942328] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 47.949586] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 47.956985] Call Trace: [ 47.959563] ? tc_lookup_action_n+0xb2/0xd0 [ 47.963876] ? ife_get_meta_u32+0x150/0x150 [ 47.968186] ? lock_downgrade+0x6e0/0x6e0 [ 47.972362] ? _raw_read_unlock+0x2d/0x50 [ 47.976494] tcf_action_init_1+0x53c/0xaa0 [ 47.980714] ? tcf_action_dump_old+0x80/0x80 [ 47.985187] ? lock_downgrade+0x6e0/0x6e0 [ 47.989393] ? nla_parse+0x186/0x240 [ 47.993092] tcf_action_init+0x2ab/0x480 [ 47.997143] ? tcf_action_init_1+0xaa0/0xaa0 [ 48.001574] ? memset+0x32/0x40 [ 48.004837] ? nla_parse+0x186/0x240 [ 48.008531] tc_ctl_action+0x32f/0x556 [ 48.012498] ? tca_action_gd+0x840/0x840 [ 48.016547] ? tca_action_gd+0x840/0x840 [ 48.020597] rtnetlink_rcv_msg+0x3eb/0xb70 [ 48.024820] ? rtnl_bridge_getlink+0x7a0/0x7a0 [ 48.029383] ? trace_hardirqs_on+0x10/0x10 [ 48.033606] ? save_trace+0x290/0x290 [ 48.037387] netlink_rcv_skb+0x14f/0x3c0 [ 48.041502] ? rtnl_bridge_getlink+0x7a0/0x7a0 [ 48.046390] ? netlink_ack+0x9a0/0x9a0 [ 48.050358] ? lock_downgrade+0x6e0/0x6e0 [ 48.054534] rtnetlink_rcv+0x1d/0x30 [ 48.058238] netlink_unicast+0x45d/0x780 [ 48.062333] ? netlink_attachskb+0x6a0/0x6a0 [ 48.066732] ? security_netlink_send+0x81/0xb0 [ 48.071302] netlink_sendmsg+0x7c4/0xc60 [ 48.075362] ? netlink_unicast+0x780/0x780 [ 48.079579] ? security_socket_sendmsg+0x89/0xb0 [ 48.084325] ? netlink_unicast+0x780/0x780 [ 48.089450] sock_sendmsg+0xce/0x110 [ 48.093141] ___sys_sendmsg+0x70a/0x840 [ 48.097262] ? copy_msghdr_from_user+0x3f0/0x3f0 [ 48.101995] ? _raw_spin_unlock+0x2d/0x50 [ 48.106239] ? do_huge_pmd_anonymous_page+0x2fc/0x1470 [ 48.111507] ? __thp_get_unmapped_area+0x130/0x130 [ 48.116423] ? __handle_mm_fault+0x6a1/0x3470 [ 48.120897] ? save_trace+0x290/0x290 [ 48.124686] ? vm_insert_mixed_mkwrite+0x40/0x40 [ 48.129428] ? __do_page_fault+0x4e9/0xb80 [ 48.133644] ? __fget_light+0x172/0x1f0 [ 48.137706] ? __fdget+0x1b/0x20 [ 48.141057] ? sockfd_lookup_light+0xb4/0x160 [ 48.145528] __sys_sendmsg+0xb9/0x140 [ 48.149311] ? SyS_shutdown+0x170/0x170 [ 48.153310] SyS_sendmsg+0x2d/0x50 [ 48.156881] ? __sys_sendmsg+0x140/0x140 [ 48.160971] do_syscall_64+0x1e8/0x640 [ 48.164846] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.169677] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 48.174848] RIP: 0033:0x4401d9 [ 48.178014] RSP: 002b:00007ffe2d070148 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 48.185866] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401d9 [ 48.193117] RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 [ 48.200421] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 48.207681] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a60 [ 48.215155] R13: 0000000000401af0 R14: 0000000000000000 R15: 0000000000000000 [ 48.222409] Code: 76 fc 48 c7 c2 bb 01 e6 84 be 01 00 00 00 48 c7 c7 60 f5 78 87 e8 de 00 62 fc 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 [ 48.241693] RIP: tcf_ife_init+0x1b3/0x1310 RSP: ffff8880810a7230 [ 48.248419] ---[ end trace 8705b4ec58ff22f8 ]--- [ 48.253238] Kernel panic - not syncing: Fatal exception [ 48.259699] Kernel Offset: disabled [ 48.263885] Rebooting in 86400 seconds..