[....] Starting enhanced syslogd: rsyslogd[ 12.942829] audit: type=1400 audit(1516306654.394:5): avc: denied { syslog } for pid=3504 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 syzkaller login: [ 19.568147] audit: type=1400 audit(1516306661.019:6): avc: denied { map } for pid=3643 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.57' (ECDSA) to the list of known hosts. executing program [ 28.337110] audit: type=1400 audit(1516306669.788:7): avc: denied { map } for pid=3658 comm="syzkaller772277" path="/root/syzkaller772277479" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 28.340170] kasan: CONFIG_KASAN_INLINE enabled [ 28.340182] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 28.340190] general protection fault: 0000 [#1] SMP KASAN [ 28.340196] Dumping ftrace buffer: [ 28.340199] (ftrace buffer empty) [ 28.340201] Modules linked in: [ 28.340210] CPU: 0 PID: 3658 Comm: syzkaller772277 Not tainted 4.15.0-rc8+ #196 [ 28.340213] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.340226] RIP: 0010:strlen+0x1f/0xa0 [ 28.340229] RSP: 0018:ffff8801bbdd7768 EFLAGS: 00010292 [ 28.340235] RAX: 0000000041b58ab3 RBX: ffff8801d9413e80 RCX: 000000000836b156 [ 28.340239] RDX: dffffc0000000000 RSI: ffff8801d9412d00 RDI: 0000000041b58ab3 [ 28.340243] RBP: ffff8801bbdd7780 R08: 1ffff100377bae55 R09: 0000000000000000 [ 28.340246] R10: ffff8801bbdd7770 R11: ffffed00377bae40 R12: ffff8801bbdd78a0 [ 28.340250] R13: 0000000041b58ab3 R14: 0000000000000040 R15: 1ffff100377baef8 [ 28.340256] FS: 0000000001961880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 28.340259] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.340263] CR2: 0000000020007000 CR3: 00000001d942a001 CR4: 00000000001606f0 [ 28.340270] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.340273] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.340275] Call Trace: [ 28.340285] ? lock_acquire+0x1d5/0x580 [ 28.340295] netlink_ack+0x120/0xa10 [ 28.340306] ? netlink_sendmsg+0xe60/0xe60 [ 28.340314] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 28.340326] ? rcu_note_context_switch+0x710/0x710 [ 28.340336] netlink_rcv_skb+0x2d1/0x400 [ 28.340343] ? genl_family_rcv_msg+0xfb0/0xfb0 [ 28.340351] ? netlink_ack+0xa10/0xa10 [ 28.340357] ? genl_rcv+0x19/0x40 [ 28.340366] ? __down_interruptible+0x6b0/0x6b0 [ 28.340373] ? netlink_skb_destructor+0x1d0/0x1d0 [ 28.340384] ? selinux_nlmsg_lookup+0x32b/0x430 [ 28.340394] genl_rcv+0x28/0x40 [ 28.340401] netlink_unicast+0x4c4/0x6b0 [ 28.340412] ? netlink_attachskb+0x8a0/0x8a0 [ 28.340424] ? security_netlink_send+0x81/0xb0 [ 28.340433] netlink_sendmsg+0xa4a/0xe60 [ 28.340446] ? netlink_unicast+0x6b0/0x6b0 [ 28.340455] ? security_socket_sendmsg+0x89/0xb0 [ 28.340462] ? netlink_unicast+0x6b0/0x6b0 [ 28.340471] sock_sendmsg+0xca/0x110 [ 28.340480] ___sys_sendmsg+0x767/0x8b0 [ 28.340491] ? copy_msghdr_from_user+0x590/0x590 [ 28.340505] ? __do_page_fault+0x5f7/0xc90 [ 28.340512] ? lock_downgrade+0x980/0x980 [ 28.340525] ? __fget_light+0x297/0x380 [ 28.340532] ? fget_raw+0x20/0x20 [ 28.340540] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 28.340545] ? vmacache_find+0x5f/0x280 [ 28.340557] ? up_read+0x1a/0x40 [ 28.340564] ? __do_page_fault+0x3d6/0xc90 [ 28.340570] ? lock_release+0xa40/0xa40 [ 28.340581] ? __fdget+0x18/0x20 [ 28.340592] __sys_sendmsg+0xe5/0x210 [ 28.340598] ? __sys_sendmsg+0xe5/0x210 [ 28.340606] ? SyS_shutdown+0x290/0x290 [ 28.340615] ? __do_page_fault+0xc90/0xc90 [ 28.340625] ? SyS_setsockopt+0x215/0x360 [ 28.340641] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 28.340652] SyS_sendmsg+0x2d/0x50 [ 28.340661] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 28.340666] RIP: 0033:0x43fdc9 [ 28.340669] RSP: 002b:00007fff11aaa528 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 28.340675] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fdc9 [ 28.340679] RDX: 0000000000000000 RSI: 0000000020008000 RDI: 0000000000000003 [ 28.340682] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 28.340686] R10: 0000000000000004 R11: 0000000000000217 R12: 00000000004016f0 [ 28.340689] R13: 0000000000401780 R14: 0000000000000000 R15: 0000000000000000 [ 28.340703] Code: 37 ff ff ff 0f 1f 84 00 00 00 00 00 55 48 89 f9 48 ba 00 00 00 00 00 fc ff df 48 c1 e9 03 48 89 f8 48 89 e5 41 54 53 48 83 ec 08 <0f> b6 14 11 48 89 f9 83 e1 07 38 ca 7f 04 84 d2 75 4b 80 38 00 [ 28.340818] RIP: strlen+0x1f/0xa0 RSP: ffff8801bbdd7768 [ 28.340827] ---[ end trace 74cb28454d7746b6 ]--- [ 28.340831] Kernel panic - not syncing: Fatal exception [ 28.363406] Dumping ftrace buffer: [ 28.363409] (ftrace buffer empty) [ 28.363412] Kernel Offset: disabled [ 28.753974] Rebooting in 86400 seconds..