[....] Starting enhanced syslogd: rsyslogd[ 17.262836] audit: type=1400 audit(1519924086.347:5): avc: denied { syslog } for pid=4084 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 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: [ 23.331922] audit: type=1400 audit(1519924092.416:6): avc: denied { map } for pid=4224 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 '10.128.10.7' (ECDSA) to the list of known hosts. executing program [ 29.593807] audit: type=1400 audit(1519924098.678:7): avc: denied { map } for pid=4238 comm="syzkaller208676" path="/root/syzkaller208676886" 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 [ 34.783156] kasan: CONFIG_KASAN_INLINE enabled [ 34.787866] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 34.795403] general protection fault: 0000 [#1] SMP KASAN [ 34.800915] Dumping ftrace buffer: [ 34.804422] (ftrace buffer empty) [ 34.808102] Modules linked in: [ 34.811267] CPU: 1 PID: 4238 Comm: syzkaller208676 Not tainted 4.16.0-rc3+ #244 [ 34.818688] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.828018] RIP: 0010:kernel_sock_shutdown+0x29/0x70 [ 34.833088] RSP: 0018:ffff8801b146fc78 EFLAGS: 00010206 [ 34.838421] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff845fb6f4 [ 34.845658] RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000028 [ 34.852910] RBP: ffff8801b146fc90 R08: 0000000000000000 R09: 1ffff1003628df0b [ 34.860149] R10: ffff8801b146f820 R11: 0000000000000001 R12: ffff8801b19fb7d2 [ 34.867392] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801b146fd08 [ 34.874630] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:000000000909a840 [ 34.882822] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 34.888676] CR2: 00007f0fa5d81000 CR3: 00000001b1902001 CR4: 00000000001606e0 [ 34.895919] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.903156] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.910396] Call Trace: [ 34.912959] smc_shutdown+0x3ed/0x540 [ 34.916729] SyS_shutdown+0x137/0x290 [ 34.920499] ? SyS_getsockopt+0x340/0x340 [ 34.924620] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 34.930128] ? do_fast_syscall_32+0x156/0xf9f [ 34.934596] ? SyS_getsockopt+0x340/0x340 [ 34.938715] do_fast_syscall_32+0x3ec/0xf9f [ 34.943009] ? do_int80_syscall_32+0x9c0/0x9c0 [ 34.947560] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 34.952286] ? syscall_return_slowpath+0x550/0x550 [ 34.957186] ? syscall_return_slowpath+0x2ac/0x550 [ 34.962083] ? prepare_exit_to_usermode+0x350/0x350 [ 34.967067] ? sysret32_from_system_call+0x5/0x3c [ 34.971879] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.976693] entry_SYSENTER_compat+0x70/0x7f [ 34.981074] RIP: 0023:0xf7f2ac99 [ 34.984409] RSP: 002b:00000000ff82066c EFLAGS: 00000217 ORIG_RAX: 0000000000000175 [ 34.992087] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000000000 [ 34.999329] RDX: 0000000000000002 RSI: 000000000000016b RDI: 0000000000000003 [ 35.006568] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 35.013807] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 35.021043] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 35.028294] Code: 66 90 55 48 89 e5 41 55 41 54 53 48 89 fb 41 89 f5 e8 4c 3d 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 [ 35.047368] RIP: kernel_sock_shutdown+0x29/0x70 RSP: ffff8801b146fc78 [ 35.053983] ---[ end trace 4673ef7e6b4a1ad3 ]--- [ 35.058728] Kernel panic - not syncing: Fatal exception [ 35.064428] Dumping ftrace buffer: [ 35.067936] (ftrace buffer empty) [ 35.071614] Kernel Offset: disabled [ 35.075211] Rebooting in 86400 seconds..