[....] Starting enhanced syslogd: rsyslogd[ 13.975635] audit: type=1400 audit(1541903031.989:4): avc: denied { syslog } for pid=1918 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.91' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 33.989491] audit: type=1400 audit(1541903051.999:5): avc: denied { create } for pid=2070 comm="syz-executor219" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 [ 34.014137] audit: type=1400 audit(1541903052.029:6): avc: denied { write } for pid=2070 comm="syz-executor219" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 [ 34.045298] kasan: CONFIG_KASAN_INLINE enabled [ 34.049702] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 34.062572] Modules linked in: [ 34.065859] CPU: 1 PID: 2070 Comm: syz-executor219 Not tainted 4.4.163+ #121 [ 34.073036] task: ffff8801d4d44740 task.stack: ffff8800b6e38000 [ 34.079066] RIP: 0010:[] [] netlink_unicast+0x1d2/0x700 [ 34.087753] RSP: 0018:ffff8800b6e3f768 EFLAGS: 00010293 [ 34.093203] RAX: dffffc0000000048 RBX: dffffc0000000000 RCX: 0000000000000030 [ 34.100450] RDX: 0000000000000000 RSI: ffffffff822e7c3b RDI: ffff8801d824e0d8 [ 34.107695] RBP: ffff8800b6e3f828 R08: ffffed003a8c22d5 R09: ffffed003a8c22d2 [ 34.114941] R10: ffffed003a8c22d4 R11: ffff8801d46116a7 R12: 0000000000000000 [ 34.122185] R13: dffffc0000000000 R14: ffff8801d824e000 R15: ffff8800b6e3f800 [ 34.129432] FS: 00000000026c1880(0063) GS:ffff8801db700000(0000) knlGS:0000000000000000 [ 34.137633] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.143492] CR2: 000055fc41c75a98 CR3: 00000001d44fb000 CR4: 00000000001606b0 [ 34.150739] Stack: [ 34.152878] ffffffff8147ec91 0000000000000030 0000000000000240 1ffff10016dc7ef4 [ 34.160874] dffffc0000000006 dffffc0000000048 000000c000000816 0000000041b58ab3 [ 34.168914] ffffffff82c7ba16 ffffffff822e7a70 ffffffff821ef53b 0000000000000000 [ 34.176914] Call Trace: [ 34.179477] [] ? memset+0x31/0x40 [ 34.184559] [] ? netlink_sendskb+0x60/0x60 [ 34.190416] [] ? skb_put+0x11b/0x160 [ 34.195766] [] netlink_ack+0x236/0x4c0 [ 34.201283] [] nfnetlink_rcv+0xc39/0x1330 [ 34.207058] [] ? netlink_deliver_tap+0x93/0x910 [ 34.213357] [] netlink_unicast+0x4ec/0x700 [ 34.219218] [] ? netlink_sendskb+0x60/0x60 [ 34.225105] [] netlink_sendmsg+0x694/0xc30 [ 34.230981] [] ? nlmsg_notify+0x140/0x140 [ 34.236754] [] ? selinux_socket_sendmsg+0x3f/0x50 [ 34.243237] [] ? security_socket_sendmsg+0x8f/0xc0 [ 34.249792] [] ? nlmsg_notify+0x140/0x140 [ 34.255564] [] sock_sendmsg+0xbb/0x110 [ 34.261079] [] ___sys_sendmsg+0x745/0x880 [ 34.266870] [] ? copy_msghdr_from_user+0x550/0x550 [ 34.273433] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 34.280183] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 34.286919] [] ? check_preemption_disabled+0x3b/0x200 [ 34.293736] [] ? check_preemption_disabled+0x3b/0x200 [ 34.300550] [] ? handle_mm_fault+0xbfd/0x2f30 [ 34.306670] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 34.313403] [] ? __fget_light+0x9f/0x1f0 [ 34.319091] [] ? __fdget+0x18/0x20 [ 34.324277] [] __sys_sendmsg+0xd6/0x190 [ 34.329877] [] ? SyS_shutdown+0x1b0/0x1b0 [ 34.335652] [] ? __do_page_fault+0x2b6/0x7e0 [ 34.341690] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 34.348507] [] SyS_sendmsg+0x2d/0x50 [ 34.353852] [] entry_SYSCALL_64_fastpath+0x1e/0x9a [ 34.360400] Code: 65 f6 01 ff 49 8d 57 c0 4c 89 e1 4c 89 f6 48 89 df e8 43 f7 ff ff 83 f8 01 0f 85 cf 03 00 00 e8 45 f6 01 ff 48 8b 85 68 ff ff ff <0f> b6 00 84 c0 74 08 3c 03 0f 8e ff 03 00 00 48 8b 85 60 ff ff [ 34.387280] RIP [] netlink_unicast+0x1d2/0x700 [ 34.393613] RSP [ 34.397504] ---[ end trace a38113d82df67959 ]--- [ 34.402283] Kernel panic - not syncing: Fatal exception [ 34.407951] Kernel Offset: disabled [ 34.411563] Rebooting in 86400 seconds..