[....] Starting enhanced syslogd: rsyslogd[ 14.100798] audit: type=1400 audit(1560092262.127:4): 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 periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.57' (ECDSA) to the list of known hosts. 2019/06/09 14:58:14 parsed 1 programs 2019/06/09 14:58:16 executed programs: 0 syzkaller login: [ 49.099137] kasan: CONFIG_KASAN_INLINE enabled [ 49.103602] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 49.116573] Modules linked in: [ 49.119896] CPU: 0 PID: 2260 Comm: syz-executor.0 Not tainted 4.4.174+ #4 [ 49.126812] task: ffff8800b4eb8000 task.stack: ffff8800b4ef0000 [ 49.132854] RIP: 0010:[] [] udp_queue_rcv_skb+0x18d/0x14e0 [ 49.141826] RSP: 0018:ffff8800b4ef79f0 EFLAGS: 00010206 [ 49.147253] RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000 [ 49.154512] RDX: 000000000000000c RSI: ffffffff824813a4 RDI: 0000000000000060 [ 49.161757] RBP: ffff8800b4ef7a30 R08: 0000000000000000 R09: 0000000000000001 [ 49.169001] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d1c48000 [ 49.176247] R13: ffff8801d214fa00 R14: 0000000000000000 R15: ffff8801d214fa58 [ 49.183491] FS: 00007f2101dcf700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000 [ 49.191692] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 49.197548] CR2: 0000000020000040 CR3: 00000000b4e54000 CR4: 00000000001606b0 [ 49.204796] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 49.212043] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 49.219300] Stack: [ 49.221422] ffff8801d1c48000 ffff880100000001 ffff8801d1c48088 ffff8801d1c48000 [ 49.229424] ffff8801d214fa00 dffffc0000000000 ffff8801d1c48088 0000000000000000 [ 49.237465] ffff8800b4ef7aa0 ffffffff821e5e40 ffff8801d1c48430 ffff8801d1c48188 [ 49.245486] Call Trace: [ 49.248053] [] release_sock+0x170/0x500 [ 49.253653] [] udp_sendmsg+0x1176/0x1c60 [ 49.259341] [] ? __lock_acquire+0xa4f/0x4f50 [ 49.265384] [] ? udp_lib_close+0x20/0x20 [ 49.271071] [] ? udp_lib_unhash+0x630/0x630 [ 49.277034] [] ? trace_hardirqs_on+0x10/0x10 [ 49.283070] [] ? sock_has_perm+0x2a8/0x400 [ 49.288933] [] ? sock_has_perm+0xa6/0x400 [ 49.294706] [] ? selinux_msg_queue_alloc_security+0x2e0/0x2e0 [ 49.302214] [] ? check_preemption_disabled+0x3c/0x200 [ 49.309031] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 49.315761] [] ? check_preemption_disabled+0x3c/0x200 [ 49.322574] [] ? check_preemption_disabled+0x3c/0x200 [ 49.329391] [] ? inet_sendmsg+0x143/0x4d0 [ 49.335172] [] inet_sendmsg+0x202/0x4d0 [ 49.340783] [] ? inet_sendmsg+0x76/0x4d0 [ 49.346478] [] ? inet_recvmsg+0x4d0/0x4d0 [ 49.352252] [] sock_sendmsg+0xbe/0x110 [ 49.357767] [] SyS_sendto+0x201/0x340 [ 49.363211] [] ? SyS_getpeername+0x2a0/0x2a0 [ 49.369256] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 49.375984] [] ? __might_fault+0x117/0x1d0 [ 49.381846] [] ? __might_fault+0x191/0x1d0 [ 49.387706] [] ? __might_fault+0xe7/0x1d0 [ 49.393480] [] ? SyS_clock_gettime+0x118/0x1e0 [ 49.399689] [] ? SyS_clock_settime+0x220/0x220 [ 49.405896] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 49.412367] [] entry_SYSCALL_64_fastpath+0x1e/0x9a [ 49.418928] Code: 8b 75 58 41 f6 c6 01 0f 85 f9 07 00 00 e8 4c 82 e8 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 6a 0e 00 00 41 f6 46 60 04 [ 49.452202] RIP [] udp_queue_rcv_skb+0x18d/0x14e0 [ 49.458790] RSP [ 49.462457] ---[ end trace d0a07043600f80b8 ]--- [ 49.467227] Kernel panic - not syncing: Fatal exception in interrupt [ 49.473735] Kernel Offset: disabled [ 49.477344] Rebooting in 86400 seconds..