[....] Starting enhanced syslogd: rsyslogd[ 10.972837] audit: type=1400 audit(1514524742.293:4): avc: denied { syslog } for pid=3180 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 '10.128.0.33' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 24.075868] kasan: CONFIG_KASAN_INLINE enabled [ 24.076636] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 24.077686] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 24.078534] Dumping ftrace buffer: [ 24.079010] (ftrace buffer empty) [ 24.079506] Modules linked in: [ 24.080007] CPU: 1 PID: 3338 Comm: syzkaller413897 Not tainted 4.9.72-gcb7518e #10 [ 24.081015] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.082233] task: ffff8801ca4b4800 task.stack: ffff8801c8368000 [ 24.083028] RIP: 0010:[] [] sg_read+0xd0c/0x1440 [ 24.084114] RSP: 0018:ffff8801c836fa50 EFLAGS: 00010246 [ 24.084834] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff82667453 [ 24.085813] RDX: 0000000000000000 RSI: 0000000000000fdc RDI: ffff8801c833a270 [ 24.086848] RBP: ffff8801c836fb58 R08: 0000000000000000 R09: ffffed0039211bcd [ 24.087832] R10: 0000000000000005 R11: ffffed0039211bcc R12: 0000000000001000 [ 24.088783] R13: 0000000000000000 R14: ffff8801c908de40 R15: ffff8801c833a240 [ 24.089794] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f77bbb40 [ 24.090929] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 24.091703] CR2: 0000000020cb8fd0 CR3: 00000001cd579000 CR4: 00000000001406e0 [ 24.092657] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.093609] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.094594] Stack: [ 24.094889] ffff8801d2340580 ffff8801c836fa80 ffff8801c833a258 ffff880100000fdc [ 24.096243] 0000000000000000 ffff8801c833a268 0000000000001000 0000000000000246 [ 24.104201] ffff8801d14e2500 1ffff1003906df56 00000000201e7000 00000000201e7024 [ 24.112152] Call Trace: [ 24.114705] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 24.121336] [] ? fsnotify+0xf30/0xf30 [ 24.126753] [] ? avc_policy_seqno+0x9/0x20 [ 24.132605] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 24.139584] [] ? security_file_permission+0x89/0x1e0 [ 24.146307] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 24.152938] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 24.159573] [] compat_do_readv_writev+0x522/0x760 [ 24.166029] [] ? do_pwritev+0x1a0/0x1a0 [ 24.171629] [] ? _raw_spin_unlock+0x2c/0x50 [ 24.177571] [] ? __fget+0x201/0x3a0 [ 24.182811] [] ? __fget+0x228/0x3a0 [ 24.188051] [] ? __fget+0x47/0x3a0 [ 24.193240] [] compat_readv+0xe3/0x150 [ 24.198742] [] do_compat_readv+0xf4/0x1d0 [ 24.204508] [] ? compat_readv+0x150/0x150 [ 24.210272] [] compat_SyS_readv+0x26/0x30 [ 24.216037] [] ? SyS_pwritev2+0x80/0x80 [ 24.221631] [] do_fast_syscall_32+0x2f7/0x890 [ 24.227739] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.234380] [] entry_SYSENTER_compat+0x51/0x60 [ 24.240586] 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 [ 24.266925] RIP [] sg_read+0xd0c/0x1440 [ 24.272627] RSP executing program [ 24.277759] ---[ end trace 9aef92f42c2f1b4b ]--- [ 24.282656] Kernel panic - not syncing: Fatal exception [ 24.288367] Dumping ftrace buffer: [ 24.291873] (ftrace buffer empty) [ 24.295553] Kernel Offset: disabled [ 24.299149] Rebooting in 86400 seconds..