[....] Starting enhanced syslogd: rsyslogd[ 11.532105] audit: type=1400 audit(1513739638.611:4): avc: denied { syslog } for pid=3159 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-8,10.128.15.221' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 20.973013] sg_write: data in/out 36090/116 bytes for SCSI command 0x67-- guessing data in; [ 20.973013] program syzkaller141978 not setting count and/or reply_len properly [ 20.990046] kasan: CONFIG_KASAN_INLINE enabled [ 20.994611] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 21.002042] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 21.008248] Dumping ftrace buffer: [ 21.011755] (ftrace buffer empty) [ 21.015431] Modules linked in: [ 21.018699] CPU: 1 PID: 3309 Comm: syzkaller141978 Not tainted 4.9.70-gc14c7b3 #110 [ 21.026456] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 21.035777] task: ffff8801c9ea9800 task.stack: ffff8801c0d60000 [ 21.041794] RIP: 0010:[] [] sg_read+0xd0c/0x1440 [ 21.049847] RSP: 0018:ffff8801c0d67ac0 EFLAGS: 00010246 [ 21.055257] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff82662783 [ 21.062489] RDX: 0000000000000000 RSI: 000000000000001a RDI: ffff8801c9312270 [ 21.069724] RBP: ffff8801c0d67bc8 R08: 0000000000000000 R09: ffffed00393b5e95 [ 21.076956] R10: 0000000000000005 R11: ffffed00393b5e94 R12: 0000000000001000 [ 21.084188] R13: 0000000000000000 R14: ffff8801c9daf480 R15: ffff8801c9312240 [ 21.091423] FS: 0000000001b45880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 21.099611] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.105454] CR2: 0000000020f93fcb CR3: 00000001c9e38000 CR4: 00000000001406e0 [ 21.112690] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.119924] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.127159] Stack: [ 21.129270] ffff8801d4e4a200 ffff8801c0d67af0 ffff8801c9312258 ffff88010000001a [ 21.137221] 0000000000000000 ffff8801c9312268 000000000000003e 0000000000000246 [ 21.145163] ffff8801d14d0780 1ffff100381acf64 0000000020f93fcb 0000000020f93fef [ 21.153107] Call Trace: [ 21.155663] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 21.162295] [] ? fsnotify+0xf30/0xf30 [ 21.167712] [] ? avc_policy_seqno+0x9/0x20 [ 21.173569] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 21.180544] [] ? security_file_permission+0x89/0x1e0 [ 21.187264] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 21.193893] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 21.200525] [] do_readv_writev+0x520/0x750 [ 21.206371] [] ? vfs_write+0x530/0x530 [ 21.211875] [] ? __pmd_alloc+0x410/0x410 [ 21.217551] [] ? __do_page_fault+0x5ec/0xd40 [ 21.223573] [] vfs_readv+0x84/0xc0 [ 21.228725] [] do_readv+0xe6/0x250 [ 21.233876] [] ? vfs_readv+0xc0/0xc0 [ 21.239203] [] ? entry_SYSCALL_64_fastpath+0x5/0xc6 [ 21.245836] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 21.252649] [] SyS_readv+0x27/0x30 [ 21.257804] [] entry_SYSCALL_64_fastpath+0x23/0xc6 [ 21.264347] 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 [ 21.290723] RIP [] sg_read+0xd0c/0x1440 [ 21.296435] RSP [ 21.300095] ---[ end trace 27adbab6e6230801 ]--- [ 21.304833] Kernel panic - not syncing: Fatal exception [ 21.310590] Dumping ftrace buffer: [ 21.314097] (ftrace buffer empty) [ 21.317770] Kernel Offset: disabled [ 21.321360] Rebooting in 86400 seconds..