[....] Starting enhanced syslogd: rsyslogd[   10.940034] audit: type=1400 audit(1515654941.237:4): avc:  denied  { syslog } for  pid=3173 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 '10.128.0.13' (ECDSA) to the list of known hosts.
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syzkaller login: [   20.943051] kasan: CONFIG_KASAN_INLINE enabled
[   20.943806] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   20.944778] general protection fault: 0000 [#1] PREEMPT SMP KASAN
[   20.945621] Dumping ftrace buffer:
[   20.946096]    (ftrace buffer empty)
[   20.946590] Modules linked in:
[   20.947110] CPU: 0 PID: 3324 Comm: syzkaller492523 Not tainted 4.9.76-g9154940 #20
[   20.948136] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   20.949427] task: ffff8801c9e68000 task.stack: ffff8801c8410000
[   20.950240] RIP: 0010:[<ffffffff8144dcb1>]  [<ffffffff8144dcb1>] __free_pages+0x21/0x80
[   20.951429] RSP: 0018:ffff8801c8417aa0  EFLAGS: 00010a07
[   20.952168] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff8266640b
[   20.953120] RDX: 1bd5a9d5a0000003 RSI: 0000000000000000 RDI: dead4ead0000001c
[   20.954100] RBP: ffff8801c8417ab0 R08: 0000000000000000 R09: ffffed003a3b72f5
[   20.955101] R10: 0000000000000005 R11: ffffed003a3b72f4 R12: 0000000000000004
[   20.956052] R13: 0000000000000020 R14: ffff8801c8b42100 R15: dffffc0000000000
[   20.957032] FS:  0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f778ab40
[   20.958104] CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
[   20.958972] CR2: 0000000020603000 CR3: 00000001ca94e000 CR4: 0000000000160670
[   20.959924] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   20.960874] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   20.961858] Stack:
[   20.962153]  0000000000000001 ffff8801c8b42258 ffff8801c8417b10 ffffffff82666431
[   20.963945]  ffff8801c8b42270 ffffed003916844b ffffed003916844e ffff8801c8b42268
[   20.971906]  dead4ead00000000 ffff8801c8b42240 0000000000000000 0000000000000000
[   20.979888] Call Trace:
[   20.982447]  [<ffffffff82666431>] sg_remove_scat.isra.19+0x1c1/0x2d0
[   20.988908]  [<ffffffff826667f5>] sg_finish_rem_req+0x2b5/0x340
[   20.994933]  [<ffffffff8266860c>] sg_read+0xa1c/0x1440
[   21.000179]  [<ffffffff82667bf0>] ? sg_proc_seq_show_debug+0xd10/0xd10
[   21.006819]  [<ffffffff8123ad50>] ? debug_check_no_locks_freed+0x2c0/0x2c0
[   21.013803]  [<ffffffff8123ad50>] ? debug_check_no_locks_freed+0x2c0/0x2c0
[   21.020783]  [<ffffffff82667bf0>] ? sg_proc_seq_show_debug+0xd10/0xd10
[   21.027421]  [<ffffffff8156a993>] __vfs_read+0x103/0x670
[   21.032840]  [<ffffffff8156a890>] ? default_llseek+0x290/0x290
[   21.038778]  [<ffffffff81641ee6>] ? fsnotify+0x86/0xf30
[   21.044110]  [<ffffffff81642d90>] ? fsnotify+0xf30/0xf30
[   21.049529]  [<ffffffff81bda889>] ? avc_policy_seqno+0x9/0x20
[   21.055380]  [<ffffffff81beb1d2>] ? selinux_file_permission+0x82/0x460
[   21.062014]  [<ffffffff81bd1949>] ? security_file_permission+0x89/0x1e0
[   21.068744]  [<ffffffff8156e445>] ? rw_verify_area+0xe5/0x2b0
[   21.074607]  [<ffffffff8156e72e>] vfs_read+0x11e/0x380
[   21.079853]  [<ffffffff81572459>] SyS_read+0xd9/0x1b0
[   21.085015]  [<ffffffff81572380>] ? vfs_copy_file_range+0x740/0x740
[   21.091388]  [<ffffffff8167b74c>] ? compat_SyS_ioctl+0x8c/0x2050
[   21.097500]  [<ffffffff81006d9f>] ? do_fast_syscall_32+0xcf/0x890
[   21.103708]  [<ffffffff81572380>] ? vfs_copy_file_range+0x740/0x740
[   21.110081]  [<ffffffff81006fc7>] do_fast_syscall_32+0x2f7/0x890
[   21.116211]  [<ffffffff81003036>] ? trace_hardirqs_off_thunk+0x1a/0x1c
[   21.122846]  [<ffffffff838b2334>] entry_SYSENTER_compat+0x74/0x83
[   21.129040] Code: e9 27 fc ff ff 0f 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 48 89 fb 48 83 c7 1c 48 89 fa 48 83 ec 08 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 3d 
[   21.155546] RIP  [<ffffffff8144dcb1>] __free_pages+0x21/0x80
[   21.161439]  RSP <ffff8801c8417aa0>
[   21.168296] ---[ end trace 0a52f3039ad554c5 ]---
[   21.173089] Kernel panic - not syncing: Fatal exception
[   21.178845] Dumping ftrace buffer:
[   21.182358]    (ftrace buffer empty)
[   21.186035] Kernel Offset: disabled
[   21.189629] Rebooting in 86400 seconds..