[ 32.025868] audit: type=1800 audit(1563592982.153:33): pid=6852 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 [ 32.053078] audit: type=1800 audit(1563592982.153:34): pid=6852 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: [ 34.963546] random: sshd: uninitialized urandom read (32 bytes read) [ 35.190947] audit: type=1400 audit(1563592985.323:35): avc: denied { map } for pid=7025 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 [ 35.241376] random: sshd: uninitialized urandom read (32 bytes read) [ 35.790904] random: sshd: uninitialized urandom read (32 bytes read) [ 35.981966] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.1.28' (ECDSA) to the list of known hosts. [ 41.506862] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 41.624954] audit: type=1400 audit(1563592991.753:36): avc: denied { map } for pid=7037 comm="syz-executor197" path="/root/syz-executor197136123" 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 [ 41.627710] netlink: 4 bytes leftover after parsing attributes in process `syz-executor197'. [ 41.660462] kasan: CONFIG_KASAN_INLINE enabled [ 41.666048] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 41.677203] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 41.683441] Modules linked in: [ 41.686623] CPU: 0 PID: 7037 Comm: syz-executor197 Not tainted 4.14.133 #28 [ 41.693713] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.703061] task: ffff88808b640040 task.stack: ffff8880a6090000 [ 41.709145] RIP: 0010:tcf_ife_init+0x1b3/0x1310 [ 41.713794] RSP: 0018:ffff8880a6097230 EFLAGS: 00010246 [ 41.719141] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff110116c8116 [ 41.726400] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000282 [ 41.733657] RBP: ffff8880a6097378 R08: ffff88808b640040 R09: 0000000000000001 [ 41.740914] R10: 0000000000000000 R11: ffff88808b640040 R12: 000000000000001f [ 41.748193] R13: ffff88809b550480 R14: ffff8880a6097350 R15: 0000000000000000 [ 41.755451] FS: 0000000001af8880(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000 [ 41.763749] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.769620] CR2: 0000000020000180 CR3: 000000008fdc6000 CR4: 00000000001406f0 [ 41.776894] Call Trace: [ 41.779468] ? tc_lookup_action_n+0xb2/0xd0 [ 41.783799] ? ife_get_meta_u32+0x150/0x150 [ 41.788120] ? lock_downgrade+0x6e0/0x6e0 [ 41.792262] ? _raw_read_unlock+0x2d/0x50 [ 41.796395] tcf_action_init_1+0x53c/0xaa0 [ 41.800617] ? tcf_action_dump_old+0x80/0x80 [ 41.805016] ? lock_downgrade+0x6e0/0x6e0 [ 41.809155] ? nla_parse+0x186/0x240 [ 41.812857] tcf_action_init+0x2ab/0x480 [ 41.816916] ? tcf_action_init_1+0xaa0/0xaa0 [ 41.821317] ? memset+0x32/0x40 [ 41.824599] ? nla_parse+0x186/0x240 [ 41.828300] tc_ctl_action+0x32f/0x556 [ 41.832187] ? tca_action_gd+0x840/0x840 [ 41.836237] ? tca_action_gd+0x840/0x840 [ 41.840281] rtnetlink_rcv_msg+0x3eb/0xb70 [ 41.844523] ? rtnl_bridge_getlink+0x7a0/0x7a0 [ 41.849089] ? trace_hardirqs_on+0x10/0x10 [ 41.853311] ? save_trace+0x290/0x290 [ 41.857096] netlink_rcv_skb+0x14f/0x3c0 [ 41.861158] ? rtnl_bridge_getlink+0x7a0/0x7a0 [ 41.865720] ? netlink_ack+0x9a0/0x9a0 [ 41.869604] ? lock_downgrade+0x6e0/0x6e0 [ 41.873735] rtnetlink_rcv+0x1d/0x30 [ 41.877431] netlink_unicast+0x45d/0x780 [ 41.881476] ? netlink_attachskb+0x6a0/0x6a0 [ 41.885896] ? security_netlink_send+0x81/0xb0 [ 41.890462] netlink_sendmsg+0x7c4/0xc60 [ 41.894505] ? netlink_unicast+0x780/0x780 [ 41.898723] ? security_socket_sendmsg+0x89/0xb0 [ 41.903464] ? netlink_unicast+0x780/0x780 [ 41.907694] sock_sendmsg+0xce/0x110 [ 41.911390] ___sys_sendmsg+0x70a/0x840 [ 41.915347] ? copy_msghdr_from_user+0x3f0/0x3f0 [ 41.920089] ? _raw_spin_unlock+0x2d/0x50 [ 41.924229] ? do_huge_pmd_anonymous_page+0x2fc/0x1470 [ 41.929491] ? __thp_get_unmapped_area+0x130/0x130 [ 41.934403] ? __handle_mm_fault+0x6a1/0x3470 [ 41.938882] ? save_trace+0x290/0x290 [ 41.942664] ? vm_insert_mixed_mkwrite+0x40/0x40 [ 41.947418] ? __do_page_fault+0x4e9/0xb80 [ 41.951639] ? __fget_light+0x172/0x1f0 [ 41.955595] ? __fdget+0x1b/0x20 [ 41.958944] ? sockfd_lookup_light+0xb4/0x160 [ 41.963442] __sys_sendmsg+0xb9/0x140 [ 41.967224] ? SyS_shutdown+0x170/0x170 [ 41.971199] SyS_sendmsg+0x2d/0x50 [ 41.974715] ? __sys_sendmsg+0x140/0x140 [ 41.978759] do_syscall_64+0x1e8/0x640 [ 41.982630] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.987462] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 41.992662] RIP: 0033:0x4401d9 [ 41.995852] RSP: 002b:00007ffc27b10908 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 42.003545] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401d9 [ 42.010912] RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 [ 42.018166] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 42.025440] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a60 [ 42.032693] R13: 0000000000401af0 R14: 0000000000000000 R15: 0000000000000000 [ 42.039969] 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 [ 42.059112] RIP: tcf_ife_init+0x1b3/0x1310 RSP: ffff8880a6097230 [ 42.065749] ---[ end trace 45625a47bbc1780d ]--- [ 42.070558] Kernel panic - not syncing: Fatal exception [ 42.076821] Kernel Offset: disabled [ 42.080459] Rebooting in 86400 seconds..