[....] Starting enhanced syslogd: rsyslogd[ 9.873831] audit: type=1400 audit(1513568332.266:4): avc: denied { syslog } for pid=3178 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 Warning: Permanently added 'ci-android-49-kasan-gce-386-0,10.128.15.194' (ECDSA) to the list of known hosts. syzkaller login: [ 20.335044] audit: type=1400 audit(1513568342.726:5): avc: denied { sys_admin } for pid=3328 comm="syzkaller885165" capability=21 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 [ 20.341899] IPVS: Creating netns size=2536 id=1 executing program [ 20.391285] audit: type=1400 audit(1513568342.786:6): avc: denied { sys_chroot } for pid=3329 comm="syzkaller885165" capability=18 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 [ 20.445579] kasan: CONFIG_KASAN_INLINE enabled [ 20.450863] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 20.458312] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 20.464517] Dumping ftrace buffer: [ 20.468020] (ftrace buffer empty) [ 20.471694] Modules linked in: [ 20.474963] CPU: 0 PID: 3339 Comm: syzkaller885165 Not tainted 4.9.69-g3f1d77c #4 [ 20.482545] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 20.491864] task: ffff8801c297b000 task.stack: ffff8801d98c0000 [ 20.497881] RIP: 0010:[] [] sg_read+0xd0c/0x1440 [ 20.505941] RSP: 0018:ffff8801d98c7a50 EFLAGS: 00010246 [ 20.511350] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 000000000000000c [ 20.518588] RDX: 0000000000000000 RSI: 00000000000000bb RDI: ffff8801d57a0170 [ 20.525821] RBP: ffff8801d98c7b58 R08: 0000000000000000 R09: ffffed0039614d61 [ 20.533056] R10: 0000000000000005 R11: ffffed0039614d60 R12: 0000000000001000 [ 20.540287] R13: 0000000000000000 R14: ffff8801cb0a6ae0 R15: ffff8801d57a0140 [ 20.547521] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f3f11b40 [ 20.555708] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 20.561553] CR2: 00000000f4f12df8 CR3: 00000001cab60000 CR4: 00000000001406f0 [ 20.568798] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 20.568801] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 20.568803] Stack: [ 20.568816] ffff8801d5519880 ffff8801d98c7a80 ffff8801d57a0158 ffff8801000000bb [ 20.568822] 0000000000000000 ffff8801d57a0168 00000000000000df 0000000000000246 [ 20.568830] ffff8801d1b4e500 1ffff1003b318f56 0000000020acef21 0000000020acef45 [ 20.568831] Call Trace: [ 20.568845] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 20.568854] [] ? fsnotify+0xf30/0xf30 [ 20.568862] [] ? avc_policy_seqno+0x9/0x20 [ 20.568871] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 20.568879] [] ? security_file_permission+0x89/0x1e0 [ 20.568886] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 20.568893] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 20.568900] [] compat_do_readv_writev+0x522/0x760 [ 20.568906] [] ? do_pwritev+0x1a0/0x1a0 [ 20.568914] [] ? __lru_cache_add+0x187/0x250 [ 20.568923] [] ? check_preemption_disabled+0x3b/0x200 [ 20.568933] [] ? __fget+0x201/0x3a0 [ 20.568938] [] ? __fget+0x228/0x3a0 [ 20.568943] [] ? __fget+0x47/0x3a0 [ 20.568949] [] compat_readv+0xe3/0x150 [ 20.568956] [] do_compat_readv+0xf4/0x1d0 [ 20.568962] [] ? compat_readv+0x150/0x150 [ 20.568969] [] compat_SyS_readv+0x26/0x30 [ 20.568975] [] ? SyS_pwritev2+0x80/0x80 [ 20.568983] [] do_fast_syscall_32+0x2f7/0x890 [ 20.568989] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 20.568997] [] entry_SYSENTER_compat+0x51/0x60 [ 20.569090] Code: 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 8a 06 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5f 28 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 df 05 00 00 48 8b 1b 48 85 db 0f 84 51 03 00 [ 20.569097] RIP [] sg_read+0xd0c/0x1440 [ 20.569099] RSP [ 20.569455] ---[ end trace a11c8b0e0ebe58c1 ]--- [ 20.569459] Kernel panic - not syncing: Fatal exception [ 20.576453] Dumping ftrace buffer: [ 20.576457] (ftrace buffer empty) [ 20.576459] Kernel Offset: disabled [ 20.792720] Rebooting in 86400 seconds..