[....] Starting enhanced syslogd: rsyslogd[ 14.050949] audit: type=1400 audit(1537583799.113:4): avc: denied { syslog } for pid=1920 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 '10.128.0.3' (ECDSA) to the list of known hosts. 2018/09/22 02:36:54 parsed 1 programs 2018/09/22 02:36:56 executed programs: 0 syzkaller login: [ 37.404943] kasan: CONFIG_KASAN_INLINE enabled [ 37.409438] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 37.422405] Modules linked in: [ 37.425739] CPU: 1 PID: 3626 Comm: syz-executor3 Not tainted 4.4.157+ #101 [ 37.432742] task: ffff8801d6d94740 task.stack: ffff8800b8ec0000 [ 37.438789] RIP: 0010:[] [] udp_queue_rcv_skb+0x18f/0x1530 [ 37.447764] RSP: 0018:ffff8800b8ec7970 EFLAGS: 00010206 [ 37.453205] RAX: dffffc0000000000 RBX: ffff8800b8c30000 RCX: 0000000000000000 [ 37.460468] RDX: 000000000000000c RSI: ffffffff823fe986 RDI: 0000000000000060 [ 37.467730] RBP: ffff8800b8ec79b0 R08: 0000000000000001 R09: 0000000000000001 [ 37.474993] R10: 0000000000000000 R11: 0000000000000001 R12: ffff8800b8e9e140 [ 37.482255] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8800b8e9e198 [ 37.489521] FS: 00007fbc2824e700(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000 [ 37.497742] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.503615] CR2: 000000002082dff0 CR3: 00000001d08bb000 CR4: 00000000001606b0 [ 37.510878] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.518138] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.525406] Stack: [ 37.527547] ffff8800b8c30088 ffff880000000001 ffff8800b8c30088 ffff8800b8c30000 [ 37.535603] ffff8800b8e9e140 dffffc0000000000 ffff8800b8e9e198 0000000000000000 [ 37.543722] ffff8800b8ec7a20 ffffffff82168d3b ffff8800b8c30430 ffff8800b8c30188 [ 37.551804] Call Trace: [ 37.554397] [] release_sock+0x17b/0x500 [ 37.560017] [] udp_sendmsg+0x1152/0x1c70 [ 37.565721] [] ? avc_has_perm_noaudit+0x2f0/0x2f0 [ 37.572221] [] ? udp_lib_close+0x20/0x20 [ 37.577924] [] ? udp_lib_unhash+0x630/0x630 [ 37.583892] [] ? trace_hardirqs_on+0x10/0x10 [ 37.589944] [] ? sock_has_perm+0x1c1/0x3f0 [ 37.595830] [] ? sock_has_perm+0x2a1/0x3f0 [ 37.601741] [] ? sock_has_perm+0x9f/0x3f0 [ 37.607537] [] ? selinux_msg_queue_alloc_security+0x2e0/0x2e0 [ 37.615070] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 37.621830] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 37.628581] [] ? check_preemption_disabled+0x3b/0x170 [ 37.635421] [] ? inet_sendmsg+0x143/0x4d0 [ 37.641214] [] inet_sendmsg+0x203/0x4d0 [ 37.646836] [] ? inet_sendmsg+0x73/0x4d0 [ 37.652539] [] ? inet_recvmsg+0x4c0/0x4c0 [ 37.658333] [] sock_sendmsg+0xbb/0x110 [ 37.663860] [] SyS_sendto+0x220/0x370 [ 37.669307] [] ? SyS_getpeername+0x2d0/0x2d0 [ 37.675358] [] ? udp_v4_get_port+0xcb/0x100 [ 37.681329] [] ? inet_bind+0xae/0x8a0 [ 37.686775] [] ? fput+0x20/0x150 [ 37.691784] [] ? SyS_bind+0x18a/0x280 [ 37.697230] [] ? SyS_socketpair+0x520/0x520 [ 37.703198] [] ? get_unused_fd_flags+0xd0/0xd0 [ 37.709439] [] ? SyS_futex+0x24e/0x360 [ 37.714973] [] ? do_futex+0x1840/0x1840 [ 37.720592] [] ? SyS_socket+0x14a/0x1f0 [ 37.726226] [] ? move_addr_to_kernel+0x50/0x50 [ 37.732469] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 37.738960] [] entry_SYSCALL_64_fastpath+0x1e/0x9a [ 37.745529] Code: 74 24 58 41 f6 c6 01 0f 85 39 08 00 00 e8 fa 63 ef 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 d1 0e 00 00 41 f6 46 60 04 [ 37.773367] RIP [] udp_queue_rcv_skb+0x18f/0x1530 [ 37.780008] RSP [ 37.783696] ---[ end trace d85e76c249c364b2 ]--- [ 37.788446] Kernel panic - not syncing: Fatal exception in interrupt [ 37.795237] Kernel Offset: disabled [ 37.798856] Rebooting in 86400 seconds..