[....] Starting enhanced syslogd: rsyslogd[ 10.573886] audit: type=1400 audit(1514321712.318:4): avc: denied { syslog } for pid=3174 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-386-4,10.128.0.46' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 18.323765] kasan: CONFIG_KASAN_INLINE enabled [ 18.324442] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 18.326016] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 18.326935] Dumping ftrace buffer: [ 18.327410] (ftrace buffer empty) [ 18.327919] Modules linked in: [ 18.328388] CPU: 0 PID: 3324 Comm: syzkaller011472 Not tainted 4.9.71-g2506378 #9 [ 18.329381] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 18.330611] task: ffff8801cb661800 task.stack: ffff8801c89c0000 [ 18.331405] RIP: 0010:[] [] sg_read+0xd0c/0x1440 [ 18.332483] RSP: 0018:ffff8801c89c7a50 EFLAGS: 00010246 [ 18.333198] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff826672a3 [ 18.334147] RDX: 0000000000000000 RSI: 0000000000000093 RDI: ffff8801c8a04370 [ 18.335098] RBP: ffff8801c89c7b58 R08: 8551c99c2a45b4bd R09: ffffed0039129a05 [ 18.336095] R10: 0000000000000005 R11: ffffed0039129a04 R12: 0000000000001000 [ 18.337045] R13: 0000000000000000 R14: ffff8801c894d000 R15: ffff8801c8a04340 [ 18.338008] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f76f7b40 [ 18.339081] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 18.339864] CR2: 0000000020c4afc1 CR3: 00000001cca75000 CR4: 00000000001406f0 [ 18.340813] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 18.341781] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 18.342729] Stack: [ 18.343022] ffff8801d54f79c0 ffff8801c89c7a80 ffff8801c8a04358 ffff880100000093 [ 18.345749] 0000000000000000 ffff8801c8a04368 00000000000000b7 0000000000000246 [ 18.353699] ffff8801d1519400 1ffff10039138f56 0000000020c4afc1 0000000020c4afe5 [ 18.361634] Call Trace: [ 18.364185] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 18.370816] [] ? fsnotify+0xf30/0xf30 [ 18.376229] [] ? avc_policy_seqno+0x9/0x20 [ 18.382077] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 18.389051] [] ? security_file_permission+0x89/0x1e0 [ 18.395764] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 18.402391] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 18.409018] [] compat_do_readv_writev+0x522/0x760 [ 18.415473] [] ? do_pwritev+0x1a0/0x1a0 [ 18.421061] [] ? __lru_cache_add+0x187/0x250 [ 18.427082] [] ? __fget+0x228/0x3a0 [ 18.432318] [] ? __fget+0x47/0x3a0 [ 18.437469] [] compat_readv+0xe3/0x150 [ 18.442969] [] do_compat_readv+0xf4/0x1d0 [ 18.448730] [] ? compat_readv+0x150/0x150 [ 18.454492] [] compat_SyS_readv+0x26/0x30 [ 18.460252] [] ? SyS_pwritev2+0x80/0x80 [ 18.465840] [] do_fast_syscall_32+0x2f7/0x890 executing program [ 18.471956] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 18.478585] [] entry_SYSENTER_compat+0x51/0x60 [ 18.484780] 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 [ 18.511008] RIP [] sg_read+0xd0c/0x1440 [ 18.516707] RSP [ 18.521371] ---[ end trace a617e82c08a4611e ]--- [ 18.526302] Kernel panic - not syncing: Fatal exception [ 18.532130] Dumping ftrace buffer: [ 18.535642] (ftrace buffer empty) [ 18.539323] Kernel Offset: disabled [ 18.542914] Rebooting in 86400 seconds..