[....] Starting enhanced syslogd: rsyslogd[ 17.542297] audit: type=1400 audit(1521033044.542:5): avc: denied { syslog } for pid=4073 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: [ 23.324119] audit: type=1400 audit(1521033050.323:6): avc: denied { map } for pid=4213 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 '10.128.0.41' (ECDSA) to the list of known hosts. executing program [ 46.521170] audit: type=1400 audit(1521033073.520:7): avc: denied { map } for pid=4229 comm="syzkaller943757" path="/root/syzkaller943757007" 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 [ 51.679134] kasan: CONFIG_KASAN_INLINE enabled [ 51.683865] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 51.691252] general protection fault: 0000 [#1] SMP KASAN [ 51.696764] Dumping ftrace buffer: [ 51.700282] (ftrace buffer empty) [ 51.703960] Modules linked in: [ 51.707127] CPU: 0 PID: 4229 Comm: syzkaller943757 Not tainted 4.16.0-rc5+ #262 [ 51.714544] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.723880] RIP: 0010:kernel_sock_shutdown+0x29/0x70 [ 51.728951] RSP: 0018:ffff8801b35d7c78 EFLAGS: 00010206 [ 51.734288] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff845ff6f4 [ 51.741531] RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000028 [ 51.748771] RBP: ffff8801b35d7c90 R08: 0000000000000000 R09: 1ffff100366baf0b [ 51.756011] R10: ffff8801b35d7820 R11: 0000000000000001 R12: ffff8801b47667d2 [ 51.763253] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801b35d7d08 [ 51.770496] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000008763840 [ 51.778693] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 51.784543] CR2: ffffffffff600400 CR3: 00000001aa975003 CR4: 00000000001606f0 [ 51.791786] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 51.799028] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 51.806268] Call Trace: [ 51.808837] smc_shutdown+0x3ed/0x540 [ 51.812635] SyS_shutdown+0x137/0x290 [ 51.816407] ? SyS_getsockopt+0x340/0x340 [ 51.820533] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 51.826042] ? do_fast_syscall_32+0x156/0xf9f [ 51.830511] ? SyS_getsockopt+0x340/0x340 [ 51.834632] do_fast_syscall_32+0x3ec/0xf9f [ 51.838938] ? do_int80_syscall_32+0x9c0/0x9c0 [ 51.843488] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 51.848213] ? syscall_return_slowpath+0x550/0x550 [ 51.853120] ? syscall_return_slowpath+0x2ac/0x550 [ 51.858020] ? prepare_exit_to_usermode+0x350/0x350 [ 51.863009] ? sysret32_from_system_call+0x5/0x3c [ 51.867829] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 51.872648] entry_SYSENTER_compat+0x70/0x7f [ 51.877024] RIP: 0023:0xf7fd4c99 [ 51.880358] RSP: 002b:00000000ff8e15cc EFLAGS: 00000217 ORIG_RAX: 0000000000000175 [ 51.888034] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000000000 [ 51.895275] RDX: 0000000000000000 RSI: 000000000000016b RDI: 0000000000000003 [ 51.902529] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 51.909766] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 51.917003] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 51.924250] Code: 66 90 55 48 89 e5 41 55 41 54 53 48 89 fb 41 89 f5 e8 ac 20 11 fd 48 8d 7b 28 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 32 4c 8b 63 28 48 b8 00 00 00 00 00 fc ff df 49 [ 51.943323] RIP: kernel_sock_shutdown+0x29/0x70 RSP: ffff8801b35d7c78 [ 51.950064] ---[ end trace 59901a811904bbfb ]--- [ 51.954828] Kernel panic - not syncing: Fatal exception [ 51.961312] Dumping ftrace buffer: [ 51.964829] (ftrace buffer empty) [ 51.968763] Kernel Offset: disabled [ 51.972363] Rebooting in 86400 seconds..