[....] Starting enhanced syslogd: rsyslogd[ 15.224646] audit: type=1400 audit(1521206400.350:5): avc: denied { syslog } for pid=3881 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: [ 21.569384] audit: type=1400 audit(1521206406.695:6): avc: denied { map } for pid=4022 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 '10.128.10.0' (ECDSA) to the list of known hosts. executing program [ 27.918729] audit: type=1400 audit(1521206413.044:7): avc: denied { map } for pid=4036 comm="syzkaller084876" path="/root/syzkaller084876054" 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 [ 33.247166] kasan: CONFIG_KASAN_INLINE enabled [ 33.251917] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 33.259292] general protection fault: 0000 [#1] SMP KASAN [ 33.264810] Dumping ftrace buffer: [ 33.268322] (ftrace buffer empty) [ 33.272003] Modules linked in: [ 33.275169] CPU: 0 PID: 4036 Comm: syzkaller084876 Not tainted 4.16.0-rc5+ #266 [ 33.282586] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.291921] RIP: 0010:kernel_sock_shutdown+0x29/0x70 [ 33.296990] RSP: 0018:ffff8801cfd1fc78 EFLAGS: 00010206 [ 33.302322] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff845ff6f4 [ 33.309661] RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000028 [ 33.316901] RBP: ffff8801cfd1fc90 R08: 0000000000000000 R09: 1ffff10039fa3f0b [ 33.324140] R10: ffff8801cfd1f820 R11: 0000000000000001 R12: ffff8801b95297d2 [ 33.331378] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801cfd1fd08 [ 33.338619] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000009d19840 [ 33.346810] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 33.352663] CR2: 0000000001b25220 CR3: 00000001d0363001 CR4: 00000000001606f0 [ 33.359905] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.367145] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.374386] Call Trace: [ 33.376946] smc_shutdown+0x3ed/0x540 [ 33.380719] SyS_shutdown+0x137/0x290 [ 33.384489] ? SyS_getsockopt+0x340/0x340 [ 33.388611] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 33.394118] ? do_fast_syscall_32+0x156/0xf9f [ 33.398585] ? SyS_getsockopt+0x340/0x340 [ 33.402702] do_fast_syscall_32+0x3ec/0xf9f [ 33.406996] ? do_int80_syscall_32+0x9c0/0x9c0 [ 33.411547] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 33.416271] ? syscall_return_slowpath+0x550/0x550 [ 33.421177] ? syscall_return_slowpath+0x2ac/0x550 [ 33.426075] ? prepare_exit_to_usermode+0x350/0x350 [ 33.431071] ? sysret32_from_system_call+0x5/0x3c [ 33.435886] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.440701] entry_SYSENTER_compat+0x70/0x7f [ 33.445080] RIP: 0023:0xf7f34c99 [ 33.448413] RSP: 002b:00000000ffd7108c EFLAGS: 00000217 ORIG_RAX: 0000000000000175 [ 33.456087] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000000000 [ 33.463328] RDX: 0000000000000000 RSI: 000000000000016b RDI: 0000000000000003 [ 33.470568] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 33.477806] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 33.485042] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 33.492289] 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 [ 33.511358] RIP: kernel_sock_shutdown+0x29/0x70 RSP: ffff8801cfd1fc78 [ 33.518026] ---[ end trace d210581a44545037 ]--- [ 33.522775] Kernel panic - not syncing: Fatal exception [ 33.528518] Dumping ftrace buffer: [ 33.532041] (ftrace buffer empty) [ 33.535723] Kernel Offset: disabled [ 33.539322] Rebooting in 86400 seconds..