[....] Starting enhanced syslogd: rsyslogd[ 11.319203] audit: type=1400 audit(1513703580.082:4): avc: denied { syslog } for pid=3156 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 'ci-android-49-kasan-gce-6,10.128.0.46' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 35.708588] sg_write: data in/out 1505792696/163 bytes for SCSI command 0xdb-- guessing data in; [ 35.708588] program syzkaller016909 not setting count and/or reply_len properly [ 35.711404] kasan: CONFIG_KASAN_INLINE enabled [ 35.712013] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 35.712997] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 35.713816] Dumping ftrace buffer: [ 35.714292] (ftrace buffer empty) [ 35.714797] Modules linked in: [ 35.715262] CPU: 0 PID: 3322 Comm: syzkaller016909 Not tainted 4.9.70-gc14c7b3 #110 [ 35.716295] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.717514] task: ffff8801c9ee1800 task.stack: ffff8801ca3c0000 [ 35.718326] RIP: 0010:[] [] sg_read+0xd0c/0x1440 [ 35.719445] RSP: 0018:ffff8801ca3c7ac0 EFLAGS: 00010246 [ 35.720162] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff82662783 [ 35.721126] RDX: 0000000000000000 RSI: 0000000000000081 RDI: ffff8801c982c370 [ 35.722078] RBP: ffff8801ca3c7bc8 R08: 0000000000000000 R09: ffffed00393b6d0d [ 35.723027] R10: 0000000000000005 R11: ffffed00393b6d0c R12: 0000000000001000 [ 35.723992] R13: 0000000000000000 R14: ffff8801c9db6840 R15: ffff8801c982c340 [ 35.724959] FS: 0000000001254880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 35.726031] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.726805] CR2: 00000000204bb000 CR3: 00000001c9b3e000 CR4: 00000000001406f0 [ 35.727758] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.728714] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.735954] Stack: [ 35.738068] ffff8801d4eae6c0 ffff8801ca3c7af0 ffff8801c982c358 ffff880100000081 [ 35.746012] 0000000000000000 ffff8801c982c368 00000000000000a5 0000000000000246 [ 35.753950] ffff8801d1490c80 1ffff10039478f64 00000000203d4000 00000000203d4024 [ 35.761889] Call Trace: [ 35.764440] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 35.771070] [] ? fsnotify+0xf30/0xf30 [ 35.776487] [] ? avc_policy_seqno+0x9/0x20 [ 35.782339] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 35.789318] [] ? security_file_permission+0x89/0x1e0 [ 35.796034] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 35.802664] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 35.809294] [] do_readv_writev+0x520/0x750 [ 35.815141] [] ? vfs_write+0x530/0x530 [ 35.820652] [] ? __pmd_alloc+0x410/0x410 [ 35.826329] [] ? __do_page_fault+0x5ec/0xd40 [ 35.832349] [] vfs_readv+0x84/0xc0 [ 35.837508] [] do_readv+0xe6/0x250 [ 35.842661] [] ? vfs_readv+0xc0/0xc0 [ 35.847988] [] ? entry_SYSCALL_64_fastpath+0x5/0xc6 [ 35.854620] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 35.861424] [] SyS_readv+0x27/0x30 [ 35.866586] [] entry_SYSCALL_64_fastpath+0x23/0xc6 [ 35.873125] 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 [ 35.899436] RIP [] sg_read+0xd0c/0x1440 [ 35.905145] RSP [ 35.908934] ---[ end trace 4a0082d067a0d6be ]--- [ 35.913660] Kernel panic - not syncing: Fatal exception [ 35.919026] Dumping ftrace buffer: [ 35.922531] (ftrace buffer empty) [ 35.926205] Kernel Offset: disabled [ 35.929801] Rebooting in 86400 seconds..