[....] Starting enhanced syslogd: rsyslogd[   12.608954] audit: type=1400 audit(1514430490.485:4): avc:  denied  { syslog } for  pid=3169 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 mcstransd: 
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] 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 '10.128.15.243' (ECDSA) to the list of known hosts.
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syzkaller login: [   20.563842] sg_write: data in/out 392925/196 bytes for SCSI command 0x0-- guessing data in;
[   20.563842]    program syzkaller506731 not setting count and/or reply_len properly
[   20.574209] sg_write: data in/out 392925/196 bytes for SCSI command 0x0-- guessing data in;
[   20.574209]    program syzkaller506731 not setting count and/or reply_len properly
[   20.594831] kasan: CONFIG_KASAN_INLINE enabled
[   20.594833] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   20.594843] general protection fault: 0000 [#1] PREEMPT SMP KASAN
[   20.594848] Dumping ftrace buffer:
[   20.594852]    (ftrace buffer empty)
[   20.594857] Modules linked in:
[   20.594864] CPU: 1 PID: 3345 Comm: syzkaller506731 Not tainted 4.9.72-gcb7518e #10
[   20.594868] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   20.594873] task: ffff8801c9460000 task.stack: ffff8801c9468000
[   20.594891] RIP: 0010:[<ffffffff8144d081>]  [<ffffffff8144d081>] __free_pages+0x21/0x80
[   20.594894] RSP: 0018:ffff8801c946faa0  EFLAGS: 00010a07
[   20.594898] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b
[   20.594902] RDX: 1bd5a9d5a0000003 RSI: 0000000000000000 RDI: dead4ead0000001c
[   20.594905] RBP: ffff8801c946fab0 R08: ffffed0039877ec4 R09: 0000000000000000
[   20.594909] R10: fffbb76600000000 R11: ffffed0039877ec4 R12: 0000000000000004
[   20.594912] R13: 0000000000000020 R14: ffff8801c94c8000 R15: dffffc0000000000
[   20.594917] FS:  0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f77b0b40
[   20.594921] CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
[   20.594924] CR2: 00000000080ca778 CR3: 00000001c9c58000 CR4: 00000000001406e0
[   20.594931] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   20.594934] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   20.594935] Stack:
[   20.594945]  0000000000000000 ffff8801c94c8158 ffff8801c946fb10 ffffffff82664fc1
[   20.594953]  ffff8801c94c8170 ffffed003929902b ffffed003929902e ffff8801c94c8168
[   20.594961]  dead4ead00000000 ffff8801c94c8140 0000000000000000 0000000000000000
[   20.594962] Call Trace:
[   20.594972]  [<ffffffff82664fc1>] sg_remove_scat.isra.19+0x1c1/0x2d0
[   20.594979]  [<ffffffff82665385>] sg_finish_rem_req+0x2b5/0x340
[   20.594984]  [<ffffffff8266719c>] sg_read+0xa1c/0x1440
[   20.594991]  [<ffffffff82666780>] ? sg_proc_seq_show_debug+0xd10/0xd10
[   20.595002]  [<ffffffff8123a020>] ? debug_check_no_locks_freed+0x2c0/0x2c0
[   20.595008]  [<ffffffff82666780>] ? sg_proc_seq_show_debug+0xd10/0xd10
[   20.595017]  [<ffffffff81569903>] __vfs_read+0x103/0x670
[   20.595024]  [<ffffffff81569800>] ? default_llseek+0x290/0x290
[   20.595033]  [<ffffffff81640e56>] ? fsnotify+0x86/0xf30
[   20.595039]  [<ffffffff81641d00>] ? fsnotify+0xf30/0xf30
[   20.595048]  [<ffffffff81bd97f9>] ? avc_policy_seqno+0x9/0x20
[   20.595055]  [<ffffffff81bea142>] ? selinux_file_permission+0x82/0x460
[   20.595067]  [<ffffffff81bd08b9>] ? security_file_permission+0x89/0x1e0
[   20.595074]  [<ffffffff8156d3b5>] ? rw_verify_area+0xe5/0x2b0
[   20.595080]  [<ffffffff8156d69e>] vfs_read+0x11e/0x380
[   20.595086]  [<ffffffff815713c9>] SyS_read+0xd9/0x1b0
[   20.595093]  [<ffffffff815712f0>] ? vfs_copy_file_range+0x740/0x740
[   20.595100]  [<ffffffff81006d9f>] ? do_fast_syscall_32+0xcf/0x890
[   20.595107]  [<ffffffff815712f0>] ? vfs_copy_file_range+0x740/0x740
[   20.595113]  [<ffffffff81006fc7>] do_fast_syscall_32+0x2f7/0x890
[   20.595119]  [<ffffffff81003036>] ? trace_hardirqs_off_thunk+0x1a/0x1c
[   20.595128]  [<ffffffff838b0be1>] entry_SYSENTER_compat+0x51/0x60
[   20.595223] 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 
[   20.595230] RIP  [<ffffffff8144d081>] __free_pages+0x21/0x80
[   20.595232]  RSP <ffff8801c946faa0>
[   20.595240] ---[ end trace 071076c6e2ce7a5c ]---
[   20.595243] Kernel panic - not syncing: Fatal exception
[   20.609171] Dumping ftrace buffer:
[   20.609174]    (ftrace buffer empty)
[   20.609176] Kernel Offset: disabled
[   20.955485] Rebooting in 86400 seconds..