[....] Starting enhanced syslogd: rsyslogd[ 10.752933] audit: type=1400 audit(1514359118.675:4): avc: denied { syslog } for pid=3174 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[1G[[32m ok [39;49m8[?25h[?0c. Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added 'ci-android-49-kasan-gce-386-1,10.128.0.17' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 18.993192] kasan: CONFIG_KASAN_INLINE enabled [ 18.993934] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 18.994945] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 18.995786] Dumping ftrace buffer: [ 18.996258] (ftrace buffer empty) [ 18.996750] Modules linked in: [ 18.997228] CPU: 1 PID: 3323 Comm: syzkaller775535 Not tainted 4.9.71-g2506378 #9 [ 18.998235] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 18.999497] task: ffff8801cc3bb000 task.stack: ffff8801c8ae0000 [ 19.000299] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 19.001463] RSP: 0018:ffff8801c8ae7990 EFLAGS: 00010a07 [ 19.002183] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664deb [ 19.003166] RDX: 1bd5a9d5a0000003 RSI: 0000000000000000 RDI: dead4ead0000001c [ 19.004175] RBP: ffff8801c8ae79a0 R08: ffffed003912ee04 R09: ffff8801c8977000 [ 19.005160] R10: 0000000000000005 R11: ffffed003912ee04 R12: 0000000000000004 [ 19.006131] R13: 0000000000000020 R14: ffff8801c90d4200 R15: dffffc0000000000 [ 19.007099] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f7779b40 [ 19.008172] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 19.008994] CR2: 0000000000001000 CR3: 00000001cd398000 CR4: 00000000001406e0 [ 19.009945] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 19.010895] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 19.011842] Stack: [ 19.012139] 0000000000000000 ffff8801c90d4358 ffff8801c8ae7a00 ffffffff82664e11 [ 19.013299] ffff8801c90d4370 ffffed003921a86b ffffed003921a86e ffff8801c90d4368 [ 19.021259] dead4ead00000000 ffff8801c90d4340 0000000000000000 0000000000000000 [ 19.029203] Call Trace: [ 19.031757] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 19.038238] [] sg_finish_rem_req+0x2b5/0x340 [ 19.044260] [] sg_read+0xa1c/0x1440 [ 19.049500] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 19.056132] [] ? fsnotify+0xf30/0xf30 [ 19.061553] [] ? avc_policy_seqno+0x9/0x20 [ 19.067405] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 19.074387] [] ? security_file_permission+0x89/0x1e0 [ 19.081112] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 19.087771] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 19.094414] [] compat_do_readv_writev+0x522/0x760 [ 19.100873] [] ? do_pwritev+0x1a0/0x1a0 [ 19.106467] [] ? exit_robust_list+0x230/0x230 [ 19.112584] [] ? check_preemption_disabled+0x3b/0x200 [ 19.119390] [] ? __fget+0x201/0x3a0 [ 19.124631] [] ? __fget+0x228/0x3a0 [ 19.129869] [] ? __fget+0x47/0x3a0 [ 19.135026] [] compat_readv+0xe3/0x150 [ 19.140528] [] do_compat_readv+0xf4/0x1d0 [ 19.146290] [] ? compat_readv+0x150/0x150 [ 19.152054] [] ? compat_SyS_sched_setaffinity+0xb7/0x110 [ 19.159117] [] ? compat_get_bitmap+0x1e0/0x1e0 [ 19.165317] [] compat_SyS_readv+0x26/0x30 [ 19.171080] [] ? SyS_pwritev2+0x80/0x80 [ 19.176669] [] do_fast_syscall_32+0x2f7/0x890 [ 19.182778] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 19.189418] [] entry_SYSENTER_compat+0x51/0x60 [ 19.195610] 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 [ 19.221880] RIP [] __free_pages+0x21/0x80 [ 19.227762] RSP [ 19.231702] ---[ end trace b3b00c33a7a9cc7b ]--- [ 19.236446] Kernel panic - not syncing: Fatal exception [ 19.242262] Dumping ftrace buffer: [ 19.245767] (ftrace buffer empty) [ 19.249450] Kernel Offset: disabled [ 19.253047] Rebooting in 86400 seconds..