[....] Starting enhanced syslogd: rsyslogd[ 13.783415] audit: type=1400 audit(1542379973.049:4): avc: denied { syslog } for pid=1921 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 '10.128.10.8' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 38.806661] kasan: CONFIG_KASAN_INLINE enabled [ 38.811216] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 38.824027] Modules linked in: [ 38.827302] CPU: 0 PID: 2079 Comm: syz-executor276 Not tainted 4.4.163+ #122 [ 38.834456] task: ffff8801d4f75f00 task.stack: ffff8801cec90000 [ 38.840477] RIP: 0010:[] [] udpv6_queue_rcv_skb+0x18f/0x1510 [ 38.849575] RSP: 0018:ffff8801cec978d0 EFLAGS: 00010206 [ 38.854990] RAX: dffffc0000000000 RBX: ffff8800b6bd0000 RCX: 0000000000000000 [ 38.862234] RDX: 000000000000000c RSI: ffffffff8260ef26 RDI: 0000000000000060 [ 38.869477] RBP: ffff8801cec97910 R08: 0000000000000001 R09: 0000000000000001 [ 38.876728] R10: 0000000000000000 R11: 0000000000000001 R12: ffff8800b772b000 [ 38.883968] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8800b772b058 [ 38.891220] FS: 0000000002461880(0063) GS:ffff8801db600000(0000) knlGS:0000000000000000 [ 38.899513] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.905367] CR2: 00000000200bfff0 CR3: 00000000bace7000 CR4: 00000000001606b0 [ 38.912626] Stack: [ 38.914768] 00000001b6bd0088 ffff8800b772b000 ffff8800b6bd0088 ffff8800b6bd0000 [ 38.922742] ffff8800b772b000 dffffc0000000000 ffff8800b772b058 0000000000000000 [ 38.930755] ffff8801cec97980 ffffffff821dd5cb ffff8800b6bd0430 ffff8800b6bd0188 [ 38.938882] Call Trace: [ 38.941440] [] release_sock+0x17b/0x500 [ 38.947034] [] udpv6_sendmsg+0x917/0x24c0 [ 38.952802] [] ? udp_lib_close+0x20/0x20 [ 38.958480] [] ? udp_v6_flush_pending_frames+0xe0/0xe0 [ 38.965378] [] ? avc_has_perm_noaudit+0x2f0/0x2f0 [ 38.971841] [] ? trace_hardirqs_on+0x10/0x10 [ 38.977868] [] ? sock_has_perm+0x1c1/0x3f0 [ 38.983724] [] ? sock_has_perm+0x2a1/0x3f0 [ 38.989576] [] ? sock_has_perm+0x9f/0x3f0 [ 38.995346] [] ? selinux_msg_queue_alloc_security+0x2e0/0x2e0 [ 39.002847] [] ? trace_hardirqs_on+0x10/0x10 [ 39.008879] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 39.015601] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 39.022338] [] ? check_preemption_disabled+0x3b/0x200 [ 39.029164] [] ? inet_sendmsg+0x143/0x4d0 [ 39.034930] [] inet_sendmsg+0x203/0x4d0 [ 39.040521] [] ? inet_sendmsg+0x73/0x4d0 [ 39.046198] [] ? inet_recvmsg+0x4c0/0x4c0 [ 39.052153] [] sock_sendmsg+0xbb/0x110 [ 39.057662] [] SyS_sendto+0x220/0x370 [ 39.063250] [] ? SyS_getpeername+0x2d0/0x2d0 [ 39.069277] [] ? inet6_bind+0x13b/0xf50 [ 39.074872] [] ? SyS_bind+0x18a/0x280 [ 39.080290] [] ? SyS_socketpair+0x520/0x520 [ 39.086231] [] ? get_unused_fd_flags+0xd0/0xd0 [ 39.092444] [] ? SyS_socket+0x14a/0x1f0 [ 39.098047] [] ? move_addr_to_kernel+0x50/0x50 [ 39.104251] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 39.110714] [] entry_SYSCALL_64_fastpath+0x1e/0x9a [ 39.117273] Code: 74 24 58 41 f6 c6 01 0f 85 24 08 00 00 e8 5a 83 cf fe 49 83 e6 fe 48 b8 00 00 00 00 00 fc ff df 49 8d 7e 60 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 01 0f 8e d0 0e 00 00 41 f6 46 60 04 [ 39.143892] RIP [] udpv6_queue_rcv_skb+0x18f/0x1510 [ 39.150651] RSP [ 39.154308] ---[ end trace ef3e992239bdac6a ]--- [ 39.159050] Kernel panic - not syncing: Fatal exception in interrupt [ 39.165809] Kernel Offset: disabled [ 39.169416] Rebooting in 86400 seconds..