[....] Starting enhanced syslogd: rsyslogd[ 15.682702] audit: type=1400 audit(1520273497.603:5): 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 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: [ 18.058484] audit: type=1400 audit(1520273499.979:6): avc: denied { map } for pid=4220 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 '10.128.0.61' (ECDSA) to the list of known hosts. executing program [ 24.371986] audit: type=1400 audit(1520273506.292:7): avc: denied { map } for pid=4234 comm="syzkaller261141" path="/root/syzkaller261141080" 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 [ 29.664132] kasan: CONFIG_KASAN_INLINE enabled [ 29.668854] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 29.676245] general protection fault: 0000 [#1] SMP KASAN [ 29.681765] Dumping ftrace buffer: [ 29.685274] (ftrace buffer empty) [ 29.688955] Modules linked in: [ 29.692121] CPU: 1 PID: 4234 Comm: syzkaller261141 Not tainted 4.16.0-rc4+ #341 [ 29.699536] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.708870] RIP: 0010:kernel_sock_shutdown+0x29/0x70 [ 29.713942] RSP: 0018:ffff8801b1907cc8 EFLAGS: 00010206 [ 29.719276] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff845fc6f4 [ 29.726515] RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000028 [ 29.733756] RBP: ffff8801b1907ce0 R08: 0000000000000000 R09: 1ffff10036320f15 [ 29.741003] R10: ffff8801b1907870 R11: 0000000000000001 R12: ffff8801a94117d2 [ 29.748248] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801b1907d58 [ 29.755494] FS: 0000000000b7c880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 29.763691] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.769541] CR2: 00007fe132aec000 CR3: 00000001b94a9002 CR4: 00000000001606e0 [ 29.776784] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.784028] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.791266] Call Trace: [ 29.793827] smc_shutdown+0x3ed/0x540 [ 29.797599] SyS_shutdown+0x137/0x290 [ 29.801376] ? SyS_getsockopt+0x340/0x340 [ 29.805505] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 29.811021] ? do_syscall_64+0xb7/0x940 [ 29.814970] ? SyS_getsockopt+0x340/0x340 [ 29.819090] do_syscall_64+0x281/0x940 [ 29.822949] ? __do_page_fault+0xc90/0xc90 [ 29.827152] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 29.831881] ? syscall_return_slowpath+0x550/0x550 [ 29.836780] ? syscall_return_slowpath+0x2ac/0x550 [ 29.841679] ? prepare_exit_to_usermode+0x350/0x350 [ 29.846664] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 29.852002] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.856827] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 29.862683] RIP: 0033:0x43fcb9 [ 29.865843] RSP: 002b:00007ffe805b4178 EFLAGS: 00000217 ORIG_RAX: 0000000000000030 [ 29.873519] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fcb9 [ 29.880760] RDX: 000000000043fcb9 RSI: 0000000000000000 RDI: 0000000000000003 [ 29.888001] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 29.895248] R10: 00000000004002c8 R11: 0000000000000217 R12: 00000000004015e0 [ 29.902489] R13: 0000000000401670 R14: 0000000000000000 R15: 0000000000000000 [ 29.909737] Code: 66 90 55 48 89 e5 41 55 41 54 53 48 89 fb 41 89 f5 e8 3c 3f 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 [ 29.928806] RIP: kernel_sock_shutdown+0x29/0x70 RSP: ffff8801b1907cc8 [ 29.935422] ---[ end trace a4f3569db30da8e8 ]--- [ 29.940178] Kernel panic - not syncing: Fatal exception [ 29.945993] Dumping ftrace buffer: [ 29.949504] (ftrace buffer empty) [ 29.953191] Kernel Offset: disabled [ 29.956787] Rebooting in 86400 seconds..