[....] Starting enhanced syslogd: rsyslogd[ 14.514693] audit: type=1400 audit(1541901879.474:4): avc: denied { syslog } for pid=1923 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 '10.128.0.49' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 53.598188] audit: type=1400 audit(1541901918.554:5): avc: denied { create } for pid=2087 comm="syz-executor763" 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 [ 53.622816] audit: type=1400 audit(1541901918.584:6): avc: denied { write } for pid=2087 comm="syz-executor763" 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 [ 53.652384] kasan: CONFIG_KASAN_INLINE enabled [ 53.656787] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 53.670039] Modules linked in: [ 53.673329] CPU: 1 PID: 2087 Comm: syz-executor763 Not tainted 4.4.163+ #11 [ 53.680406] task: ffff8800b7e6c740 task.stack: ffff8801d3820000 [ 53.686437] RIP: 0010:[] [] netlink_unicast+0x1d2/0x700 [ 53.695115] RSP: 0018:ffff8801d38276e8 EFLAGS: 00010293 [ 53.700554] RAX: dffffc0000000048 RBX: dffffc0000000000 RCX: 0000000000000030 [ 53.707797] RDX: 0000000000000000 RSI: ffffffff822e7c3b RDI: ffff8801d8127998 [ 53.715044] RBP: ffff8801d38277a8 R08: ffffed0016d76635 R09: ffffed0016d76632 [ 53.722308] R10: ffffed0016d76634 R11: ffff8800b6bb31a7 R12: 0000000000000000 [ 53.729555] R13: dffffc0000000000 R14: ffff8801d81278c0 R15: ffff8801d3827780 [ 53.736798] FS: 0000000000000000(0000) GS:ffff8801db700000(0063) knlGS:0000000009cc7840 [ 53.744998] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 53.750855] CR2: 00007fff81509f28 CR3: 00000001d5761000 CR4: 00000000001606b0 [ 53.758119] Stack: [ 53.760242] ffffffff8147ec91 0000000000000030 0000000000000240 1ffff1003a704ee4 [ 53.768233] dffffc0000000006 dffffc0000000048 000000c000000827 0000000041b58ab3 [ 53.776236] ffffffff82c7ba16 ffffffff822e7a70 ffffffff821ef53b 0000000000000000 [ 53.784235] Call Trace: [ 53.786800] [] ? memset+0x31/0x40 [ 53.791882] [] ? netlink_sendskb+0x60/0x60 [ 53.797739] [] ? skb_put+0x11b/0x160 [ 53.803082] [] netlink_ack+0x236/0x4c0 [ 53.808594] [] nfnetlink_rcv+0xc39/0x1330 [ 53.814368] [] ? netlink_deliver_tap+0x93/0x910 [ 53.820664] [] netlink_unicast+0x4ec/0x700 [ 53.826523] [] ? netlink_sendskb+0x60/0x60 [ 53.832380] [] netlink_sendmsg+0x694/0xc30 [ 53.838241] [] ? nlmsg_notify+0x140/0x140 [ 53.844030] [] ? move_addr_to_kernel.part.5+0xc1/0x100 [ 53.850933] [] ? selinux_socket_sendmsg+0x3f/0x50 [ 53.857397] [] ? security_socket_sendmsg+0x8f/0xc0 [ 53.863950] [] ? nlmsg_notify+0x140/0x140 [ 53.869722] [] sock_sendmsg+0xbb/0x110 [ 53.875238] [] ___sys_sendmsg+0x745/0x880 [ 53.881011] [] ? copy_msghdr_from_user+0x550/0x550 [ 53.887565] [] ? trace_hardirqs_on+0x10/0x10 [ 53.893600] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 53.900329] [] ? check_preemption_disabled+0x3b/0x200 [ 53.907144] [] ? check_preemption_disabled+0x3b/0x200 [ 53.913957] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 53.920684] [] ? __fget_light+0x9f/0x1f0 [ 53.926388] [] ? __fdget+0x18/0x20 [ 53.931554] [] ? sockfd_lookup_light+0xb6/0x160 [ 53.937848] [] __sys_sendmsg+0xd6/0x190 [ 53.943447] [] ? SyS_shutdown+0x1b0/0x1b0 [ 53.949241] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 53.955970] [] ? __do_page_fault+0x2b6/0x7e0 [ 53.962002] [] compat_SyS_sendmsg+0x2a/0x40 [ 53.967945] [] ? compat_SyS_getsockopt+0x570/0x570 [ 53.974518] [] do_fast_syscall_32+0x31e/0xa80 [ 53.980639] [] sysenter_flags_fixed+0xd/0x1a [ 53.986666] 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 [ 54.013534] RIP [] netlink_unicast+0x1d2/0x700 [ 54.019858] RSP [ 54.023545] ---[ end trace a6dd80eb7613c42e ]--- [ 54.028309] Kernel panic - not syncing: Fatal exception [ 54.033930] Kernel Offset: disabled [ 54.037544] Rebooting in 86400 seconds..