[....] Starting enhanced syslogd: rsyslogd[ 13.297886] audit: type=1400 audit(1539064708.395:4): avc: denied { syslog } for pid=1919 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 periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Starting mcstransd: [....] 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 '10.128.0.87' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 33.894915] audit: type=1400 audit(1539064728.995:5): avc: denied { create } for pid=2072 comm="syz-executor528" 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 [ 33.919615] audit: type=1400 audit(1539064729.015:6): avc: denied { write } for pid=2072 comm="syz-executor528" 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 [ 33.943857] kasan: CONFIG_KASAN_INLINE enabled [ 33.948250] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 33.961552] Modules linked in: [ 33.964836] CPU: 0 PID: 2072 Comm: syz-executor528 Not tainted 4.4.159+ #108 [ 33.971993] task: ffff8801d4f717c0 task.stack: ffff8801d4000000 [ 33.978017] RIP: 0010:[] [] netlink_unicast+0x1d2/0x700 [ 33.986690] RSP: 0018:ffff8801d4007768 EFLAGS: 00010293 [ 33.992108] RAX: dffffc0000000048 RBX: dffffc0000000000 RCX: 0000000000000030 [ 33.999348] RDX: 0000000000000000 RSI: ffffffff822daf1b RDI: ffff8800b6961218 [ 34.006591] RBP: ffff8801d4007828 R08: ffffed0016e7e995 R09: ffffed0016e7e992 [ 34.013832] R10: ffffed0016e7e994 R11: ffff8800b73f4ca7 R12: 0000000000000000 [ 34.021072] R13: dffffc0000000000 R14: ffff8800b6961140 R15: ffff8801d4007800 [ 34.028316] FS: 0000000001734880(0063) GS:ffff8801db600000(0000) knlGS:0000000000000000 [ 34.036520] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.042374] CR2: 0000000020000600 CR3: 00000001d6fed000 CR4: 00000000001606b0 [ 34.049616] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.056859] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.064097] Stack: [ 34.066341] ffffffff8147eb11 0000000000000030 0000000000000240 1ffff1003a800ef4 [ 34.074333] dffffc0000000006 dffffc0000000048 000000c000000818 0000000041b58ab3 [ 34.082356] ffffffff82c7ac3a ffffffff822dad50 ffffffff821e2a0b 0000000000000000 [ 34.090359] Call Trace: [ 34.092923] [] ? memset+0x31/0x40 [ 34.097999] [] ? netlink_sendskb+0x60/0x60 [ 34.103857] [] ? skb_put+0x11b/0x160 [ 34.109195] [] netlink_ack+0x236/0x4c0 [ 34.114706] [] nfnetlink_rcv+0xc39/0x1330 [ 34.120473] [] ? netlink_deliver_tap+0x93/0x910 [ 34.126782] [] netlink_unicast+0x4ec/0x700 [ 34.132646] [] ? netlink_sendskb+0x60/0x60 [ 34.138526] [] netlink_sendmsg+0x694/0xc30 [ 34.144393] [] ? nlmsg_notify+0x140/0x140 [ 34.150189] [] ? selinux_socket_sendmsg+0x3f/0x50 [ 34.156657] [] ? security_socket_sendmsg+0x8f/0xc0 [ 34.163225] [] ? nlmsg_notify+0x140/0x140 [ 34.169009] [] sock_sendmsg+0xbb/0x110 [ 34.174526] [] ___sys_sendmsg+0x745/0x880 [ 34.180314] [] ? copy_msghdr_from_user+0x550/0x550 [ 34.186866] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 34.193591] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 34.200316] [] ? check_preemption_disabled+0x3b/0x170 [ 34.207126] [] ? check_preemption_disabled+0x3b/0x170 [ 34.213940] [] ? handle_mm_fault+0xbfd/0x2f30 [ 34.220058] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 34.226804] [] ? __fget_light+0x9f/0x1f0 [ 34.232490] [] ? __fdget+0x18/0x20 [ 34.237706] [] __sys_sendmsg+0xd6/0x190 [ 34.243301] [] ? SyS_shutdown+0x1b0/0x1b0 [ 34.249070] [] ? __do_page_fault+0x2b6/0x7e0 [ 34.255100] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 34.261910] [] SyS_sendmsg+0x2d/0x50 [ 34.267250] [] entry_SYSCALL_64_fastpath+0x1e/0x9a [ 34.273808] 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 [ 34.300734] RIP [] netlink_unicast+0x1d2/0x700 [ 34.307083] RSP [ 34.310991] ---[ end trace 4cdf3c079085e08c ]--- [ 34.315792] Kernel panic - not syncing: Fatal exception [ 34.321495] Kernel Offset: disabled [ 34.325115] Rebooting in 86400 seconds..