[....] Starting enhanced syslogd: rsyslogd[ 16.577598] audit: type=1400 audit(1519908601.958:5): avc: denied { syslog } for pid=4082 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 OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.606580] audit: type=1400 audit(1519908606.987:6): avc: denied { map } for pid=4222 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 '10.128.0.27' (ECDSA) to the list of known hosts. executing program [ 27.871286] audit: type=1400 audit(1519908613.252:7): avc: denied { map } for pid=4236 comm="syzkaller546698" path="/root/syzkaller546698674" 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 [ 33.247122] kasan: CONFIG_KASAN_INLINE enabled [ 33.251840] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 33.259415] general protection fault: 0000 [#1] SMP KASAN [ 33.264929] Dumping ftrace buffer: [ 33.268440] (ftrace buffer empty) [ 33.272146] Modules linked in: [ 33.275317] CPU: 0 PID: 4236 Comm: syzkaller546698 Not tainted 4.16.0-rc3+ #244 [ 33.282760] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.292101] RIP: 0010:kernel_sock_shutdown+0x29/0x70 [ 33.297171] RSP: 0018:ffff8801d2f57c78 EFLAGS: 00010206 [ 33.302511] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff845fb6f4 [ 33.309755] RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000028 [ 33.316996] RBP: ffff8801d2f57c90 R08: 0000000000000000 R09: 1ffff1003a5eaf0b [ 33.324324] R10: ffff8801d2f57820 R11: 0000000000000001 R12: ffff8801b07c37d2 [ 33.331586] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801d2f57d08 [ 33.338835] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000009f29840 [ 33.347032] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 33.352883] CR2: 00007f535d2a1000 CR3: 00000001b0046004 CR4: 00000000001606f0 [ 33.360146] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.367386] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.374626] Call Trace: [ 33.377190] smc_shutdown+0x3ed/0x540 [ 33.380963] SyS_shutdown+0x137/0x290 [ 33.384733] ? SyS_getsockopt+0x340/0x340 [ 33.388856] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 33.394371] ? do_fast_syscall_32+0x156/0xf9f [ 33.398838] ? SyS_getsockopt+0x340/0x340 [ 33.402962] do_fast_syscall_32+0x3ec/0xf9f [ 33.407258] ? do_int80_syscall_32+0x9c0/0x9c0 [ 33.411809] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 33.416541] ? syscall_return_slowpath+0x550/0x550 [ 33.421439] ? syscall_return_slowpath+0x2ac/0x550 [ 33.426337] ? prepare_exit_to_usermode+0x350/0x350 [ 33.431332] ? sysret32_from_system_call+0x5/0x3c [ 33.436147] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.440960] entry_SYSENTER_compat+0x70/0x7f [ 33.445339] RIP: 0023:0xf7f96c99 [ 33.448673] RSP: 002b:00000000fffe01dc EFLAGS: 00000217 ORIG_RAX: 0000000000000175 [ 33.456351] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000000000 [ 33.463590] RDX: 0000000000000000 RSI: 000000000000016b RDI: 0000000000000003 [ 33.470830] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 33.478067] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 33.485305] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 33.492556] 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 [ 33.511637] RIP: kernel_sock_shutdown+0x29/0x70 RSP: ffff8801d2f57c78 [ 33.518356] ---[ end trace c4c9a8e612646bf4 ]--- [ 33.523117] Kernel panic - not syncing: Fatal exception [ 33.528816] Dumping ftrace buffer: [ 33.532333] (ftrace buffer empty) [ 33.536013] Kernel Offset: disabled [ 33.539609] Rebooting in 86400 seconds..