[....] Starting enhanced syslogd: rsyslogd[ 13.877453] audit: type=1400 audit(1539064650.975:4): avc: denied { syslog } for pid=1922 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[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.105' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 33.893909] audit: type=1400 audit(1539064670.995:5): avc: denied { create } for pid=2074 comm="syz-executor033" 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 [ 33.918709] audit: type=1400 audit(1539064671.015:6): avc: denied { write } for pid=2074 comm="syz-executor033" 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 [ 33.942781] kasan: CONFIG_KASAN_INLINE enabled [ 33.947169] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 33.960356] Modules linked in: [ 33.963654] CPU: 0 PID: 2074 Comm: syz-executor033 Not tainted 4.4.159+ #44 [ 33.970741] task: ffff8800b74e5f00 task.stack: ffff8800b65f8000 [ 33.976767] RIP: 0010:[] [] netlink_unicast+0x1d2/0x700 [ 33.985444] RSP: 0018:ffff8800b65ff6e8 EFLAGS: 00010293 [ 33.990865] RAX: dffffc0000000048 RBX: dffffc0000000000 RCX: 0000000000000030 [ 33.998122] RDX: 0000000000000000 RSI: ffffffff822daf1b RDI: ffff8801d4b31ad8 [ 34.005369] RBP: ffff8800b65ff7a8 R08: ffffed003a8e2235 R09: ffffed003a8e2232 [ 34.012607] R10: ffffed003a8e2234 R11: ffff8801d47111a7 R12: 0000000000000000 [ 34.019847] R13: dffffc0000000000 R14: ffff8801d4b31a00 R15: ffff8800b65ff780 [ 34.027093] FS: 0000000000000000(0000) GS:ffff8801db600000(0063) knlGS:0000000008ed8840 [ 34.035288] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 34.041140] CR2: 0000000020000600 CR3: 00000001d83c5000 CR4: 00000000001606b0 [ 34.048389] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.055629] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.062868] Stack: [ 34.064989] ffffffff8147eb11 0000000000000030 0000000000000240 1ffff10016cbfee4 [ 34.072975] dffffc0000000006 dffffc0000000048 000000c00000081a 0000000041b58ab3 [ 34.080964] ffffffff82c7ac3a ffffffff822dad50 ffffffff821e2a0b 0000000000000000 [ 34.088943] Call Trace: [ 34.091506] [] ? memset+0x31/0x40 [ 34.096581] [] ? netlink_sendskb+0x60/0x60 [ 34.102440] [] ? skb_put+0x11b/0x160 [ 34.107777] [] netlink_ack+0x236/0x4c0 [ 34.113287] [] nfnetlink_rcv+0xc39/0x1330 [ 34.119056] [] ? netlink_deliver_tap+0x93/0x910 [ 34.125345] [] netlink_unicast+0x4ec/0x700 [ 34.131197] [] ? netlink_sendskb+0x60/0x60 [ 34.137051] [] netlink_sendmsg+0x694/0xc30 [ 34.142907] [] ? nlmsg_notify+0x140/0x140 [ 34.148675] [] ? move_addr_to_kernel.part.5+0xc1/0x100 [ 34.155603] [] ? selinux_socket_sendmsg+0x3f/0x50 [ 34.162093] [] ? security_socket_sendmsg+0x8f/0xc0 [ 34.168658] [] ? nlmsg_notify+0x140/0x140 [ 34.174429] [] sock_sendmsg+0xbb/0x110 [ 34.179937] [] ___sys_sendmsg+0x745/0x880 [ 34.185706] [] ? copy_msghdr_from_user+0x550/0x550 [ 34.192259] [] ? trace_hardirqs_on+0x10/0x10 [ 34.198291] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 34.205017] [] ? check_preemption_disabled+0x3b/0x170 [ 34.211825] [] ? check_preemption_disabled+0x3b/0x170 [ 34.218636] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 34.225464] [] ? __fget_light+0x9f/0x1f0 [ 34.231155] [] ? __fdget+0x18/0x20 [ 34.236321] [] ? sockfd_lookup_light+0xb6/0x160 [ 34.242614] [] __sys_sendmsg+0xd6/0x190 [ 34.248207] [] ? SyS_shutdown+0x1b0/0x1b0 [ 34.253975] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 34.260701] [] ? __do_page_fault+0x2b6/0x7e0 [ 34.266731] [] compat_SyS_sendmsg+0x2a/0x40 [ 34.272673] [] ? compat_SyS_getsockopt+0x570/0x570 [ 34.279225] [] do_fast_syscall_32+0x31e/0xa80 [ 34.285342] [] sysenter_flags_fixed+0xd/0x1a [ 34.291367] Code: 85 bf 02 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 65 bf 02 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 [ 34.318414] RIP [] netlink_unicast+0x1d2/0x700 [ 34.324739] RSP [ 34.328788] ---[ end trace 3b75351ff12e9785 ]--- [ 34.333684] Kernel panic - not syncing: Fatal exception [ 34.339332] Kernel Offset: disabled [ 34.342932] Rebooting in 86400 seconds..