[....] Starting enhanced syslogd: rsyslogd[ 10.270883] audit: type=1400 audit(1513736719.606:4): 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 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-3,10.128.0.39' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 21.144595] sg_write: data in/out 117476602/1 bytes for SCSI command 0xe2-- guessing data in; [ 21.144595] program syzkaller283098 not setting count and/or reply_len properly [ 21.148684] kasan: CONFIG_KASAN_INLINE enabled [ 21.149316] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 21.150292] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 21.151111] Dumping ftrace buffer: [ 21.151585] (ftrace buffer empty) [ 21.152080] Modules linked in: [ 21.152546] CPU: 0 PID: 3324 Comm: syzkaller283098 Not tainted 4.9.70-gc14c7b3 #110 [ 21.153564] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 21.154822] task: ffff8801cbb74800 task.stack: ffff8801c9770000 [ 21.155636] RIP: 0010:[] [] sg_read+0xd0c/0x1440 [ 21.156735] RSP: 0018:ffff8801c9777ac0 EFLAGS: 00010246 [ 21.157452] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff82662783 [ 21.158402] RDX: 0000000000000000 RSI: 0000000000000071 RDI: ffff8801c920a270 [ 21.159351] RBP: ffff8801c9777bc8 R08: 0000000000000000 R09: ffffed0039322c29 [ 21.160318] R10: 0000000000000005 R11: ffffed0039322c28 R12: 0000000000001000 [ 21.161268] R13: 0000000000000000 R14: ffff8801c9916120 R15: ffff8801c920a240 [ 21.162246] FS: 0000000001eec880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 21.163391] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.164198] CR2: 0000000020aaaf6b CR3: 00000001d01fc000 CR4: 00000000001406f0 [ 21.168052] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.175287] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.182520] Stack: [ 21.184634] ffff8801d5b079c0 ffff8801c9777af0 ffff8801c920a258 ffff880100000071 [ 21.192583] 0000000000000000 ffff8801c920a268 0000000000000095 0000000000000246 [ 21.200529] ffff8801d143ca00 1ffff100392eef64 0000000020aaaf6b 0000000020aaaf8f [ 21.208479] Call Trace: [ 21.211031] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 21.217661] [] ? fsnotify+0xf30/0xf30 [ 21.223077] [] ? avc_policy_seqno+0x9/0x20 [ 21.228936] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 21.235919] [] ? security_file_permission+0x89/0x1e0 [ 21.242636] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 21.249266] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 21.255899] [] do_readv_writev+0x520/0x750 [ 21.261748] [] ? vfs_write+0x530/0x530 [ 21.267251] [] ? __pmd_alloc+0x410/0x410 [ 21.272928] [] ? __do_page_fault+0x5ec/0xd40 [ 21.278951] [] vfs_readv+0x84/0xc0 [ 21.284105] [] do_readv+0xe6/0x250 [ 21.289259] [] ? vfs_readv+0xc0/0xc0 [ 21.294588] [] ? entry_SYSCALL_64_fastpath+0x5/0xc6 [ 21.301218] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 21.308021] [] SyS_readv+0x27/0x30 [ 21.313174] [] entry_SYSCALL_64_fastpath+0x23/0xc6 [ 21.319713] 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 [ 21.346037] RIP [] sg_read+0xd0c/0x1440 [ 21.351749] RSP [ 21.355624] ---[ end trace b11cd10379ff89a4 ]--- [ 21.360351] Kernel panic - not syncing: Fatal exception [ 21.365729] Dumping ftrace buffer: [ 21.369248] (ftrace buffer empty) [ 21.372925] Kernel Offset: disabled [ 21.376524] Rebooting in 86400 seconds..