[ 33.331471] audit: type=1800 audit(1563593974.041:33): pid=6892 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 [ 33.361509] audit: type=1800 audit(1563593974.041:34): pid=6892 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: [ 36.468250] random: sshd: uninitialized urandom read (32 bytes read) [ 36.743101] audit: type=1400 audit(1563593977.451:35): avc: denied { map } for pid=7065 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 [ 36.793301] random: sshd: uninitialized urandom read (32 bytes read) [ 37.365196] random: sshd: uninitialized urandom read (32 bytes read) [ 37.556469] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.185' (ECDSA) to the list of known hosts. [ 43.141564] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 43.263345] audit: type=1400 audit(1563593983.971:36): avc: denied { map } for pid=7077 comm="syz-executor632" path="/root/syz-executor632369841" 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 [ 43.266111] netlink: 4 bytes leftover after parsing attributes in process `syz-executor632'. [ 43.298850] kasan: CONFIG_KASAN_INLINE enabled [ 43.304085] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 43.311515] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 43.317771] Modules linked in: [ 43.320942] CPU: 0 PID: 7077 Comm: syz-executor632 Not tainted 4.14.133 #28 [ 43.328012] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.337338] task: ffff888098332280 task.stack: ffff888090978000 [ 43.343375] RIP: 0010:tcf_ife_init+0x1b3/0x1310 [ 43.348012] RSP: 0018:ffff88809097f230 EFLAGS: 00010246 [ 43.353350] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff1101306655e [ 43.360711] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000282 [ 43.367984] RBP: ffff88809097f378 R08: ffff888098332280 R09: 0000000000000001 [ 43.375236] R10: 0000000000000000 R11: ffff888098332280 R12: 000000000000001f [ 43.382577] R13: ffff88809ad2f200 R14: ffff88809097f350 R15: 0000000000000000 [ 43.389821] FS: 0000000002219880(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000 [ 43.398020] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 43.403877] CR2: 000055bccf159180 CR3: 000000007824c000 CR4: 00000000001406f0 [ 43.411122] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 43.418368] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 43.425615] Call Trace: [ 43.428200] ? tc_lookup_action_n+0xb2/0xd0 [ 43.432498] ? ife_get_meta_u32+0x150/0x150 [ 43.436795] ? lock_downgrade+0x6e0/0x6e0 [ 43.440921] ? _raw_read_unlock+0x2d/0x50 [ 43.445042] tcf_action_init_1+0x53c/0xaa0 [ 43.449253] ? tcf_action_dump_old+0x80/0x80 [ 43.453638] ? lock_downgrade+0x6e0/0x6e0 [ 43.457771] ? nla_parse+0x186/0x240 [ 43.461462] tcf_action_init+0x2ab/0x480 [ 43.465498] ? tcf_action_init_1+0xaa0/0xaa0 [ 43.469885] ? memset+0x32/0x40 [ 43.473152] ? nla_parse+0x186/0x240 [ 43.476839] tc_ctl_action+0x32f/0x556 [ 43.480705] ? tca_action_gd+0x840/0x840 [ 43.484742] ? tca_action_gd+0x840/0x840 [ 43.488808] rtnetlink_rcv_msg+0x3eb/0xb70 [ 43.493019] ? rtnl_bridge_getlink+0x7a0/0x7a0 [ 43.497580] ? trace_hardirqs_on+0x10/0x10 [ 43.501786] ? save_trace+0x290/0x290 [ 43.505561] netlink_rcv_skb+0x14f/0x3c0 [ 43.509594] ? rtnl_bridge_getlink+0x7a0/0x7a0 [ 43.514161] ? netlink_ack+0x9a0/0x9a0 [ 43.518024] ? lock_downgrade+0x6e0/0x6e0 [ 43.522148] rtnetlink_rcv+0x1d/0x30 [ 43.525835] netlink_unicast+0x45d/0x780 [ 43.529872] ? netlink_attachskb+0x6a0/0x6a0 [ 43.534277] ? security_netlink_send+0x81/0xb0 [ 43.538849] netlink_sendmsg+0x7c4/0xc60 [ 43.542893] ? netlink_unicast+0x780/0x780 [ 43.547101] ? security_socket_sendmsg+0x89/0xb0 [ 43.551846] ? netlink_unicast+0x780/0x780 [ 43.556077] sock_sendmsg+0xce/0x110 [ 43.559764] ___sys_sendmsg+0x70a/0x840 [ 43.563801] ? copy_msghdr_from_user+0x3f0/0x3f0 [ 43.568529] ? _raw_spin_unlock+0x2d/0x50 [ 43.572668] ? do_huge_pmd_anonymous_page+0x2fc/0x1470 [ 43.577935] ? __thp_get_unmapped_area+0x130/0x130 [ 43.582841] ? __handle_mm_fault+0x6a1/0x3470 [ 43.587315] ? save_trace+0x290/0x290 [ 43.591091] ? vm_insert_mixed_mkwrite+0x40/0x40 [ 43.595854] ? __do_page_fault+0x4e9/0xb80 [ 43.600074] ? __fget_light+0x172/0x1f0 [ 43.604029] ? __fdget+0x1b/0x20 [ 43.607388] ? sockfd_lookup_light+0xb4/0x160 [ 43.611860] __sys_sendmsg+0xb9/0x140 [ 43.615638] ? SyS_shutdown+0x170/0x170 [ 43.619587] SyS_sendmsg+0x2d/0x50 [ 43.623098] ? __sys_sendmsg+0x140/0x140 [ 43.627136] do_syscall_64+0x1e8/0x640 [ 43.631011] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.635830] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 43.641009] RIP: 0033:0x4401d9 [ 43.644187] RSP: 002b:00007ffebac1dd28 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 43.651873] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401d9 [ 43.659112] RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 [ 43.666356] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 43.673689] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a60 [ 43.680935] R13: 0000000000401af0 R14: 0000000000000000 R15: 0000000000000000 [ 43.688191] 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 [ 43.707264] RIP: tcf_ife_init+0x1b3/0x1310 RSP: ffff88809097f230 [ 43.713800] ---[ end trace 3f710828b168021d ]--- [ 43.718551] Kernel panic - not syncing: Fatal exception [ 43.724945] Kernel Offset: disabled [ 43.728577] Rebooting in 86400 seconds..