[....] Starting enhanced syslogd: rsyslogd[ 13.721945] audit: type=1400 audit(1514280324.215:4): avc: denied { syslog } for pid=3171 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-4,10.128.0.19' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 27.458066] IPVS: Creating netns size=2536 id=1 [ 27.495082] IPVS: Creating netns size=2536 id=2 [ 27.497405] kasan: CONFIG_KASAN_INLINE enabled [ 27.497407] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 27.497416] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 27.497421] Dumping ftrace buffer: [ 27.497424] (ftrace buffer empty) [ 27.497428] Modules linked in: [ 27.497436] CPU: 1 PID: 3336 Comm: syzkaller193673 Not tainted 4.9.71-g2506378 #113 [ 27.497439] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.497443] task: ffff8801ca6d3000 task.stack: ffff8801c8ef8000 [ 27.497460] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 27.497464] RSP: 0018:ffff8801c8eff9b0 EFLAGS: 00010a07 [ 27.497468] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664deb [ 27.497471] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 27.497475] RBP: ffff8801c8eff9c0 R08: 0000000000000001 R09: 0000000000000000 [ 27.497478] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 27.497481] R13: 0000000000000020 R14: ffff8801c8770000 R15: dffffc0000000000 [ 27.497487] FS: 00000000006ef880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 27.497490] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.497494] CR2: 00000000204e9fd0 CR3: 00000001c90d3000 CR4: 00000000001406e0 [ 27.497500] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.497503] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.497505] Stack: [ 27.497514] ffff8801ca6d3000 ffff8801c8770158 ffff8801c8effa20 ffffffff82664e11 [ 27.497522] ffff8801c8770170 ffffed00390ee02b ffffed00390ee02e ffff8801c8770168 [ 27.497528] dead4ead00000000 ffff8801c8770140 0000000000000000 0000000000000000 [ 27.497530] Call Trace: [ 27.497540] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 27.497546] [] sg_finish_rem_req+0x2b5/0x340 [ 27.497552] [] sg_new_read.isra.20+0x39/0x3e0 [ 27.497558] [] ? sg_get_rq_mark+0x142/0x190 [ 27.497563] [] sg_read+0x8bd/0x1440 [ 27.497570] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 27.497579] [] ? fsnotify+0xf30/0xf30 [ 27.497588] [] ? avc_policy_seqno+0x9/0x20 [ 27.497596] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 27.497602] [] ? security_file_permission+0x89/0x1e0 [ 27.497608] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 27.497614] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 27.497621] [] do_readv_writev+0x520/0x750 [ 27.497627] [] ? vfs_write+0x530/0x530 [ 27.497637] [] ? __pmd_alloc+0x410/0x410 [ 27.497647] [] ? __do_page_fault+0x5ec/0xd40 [ 27.497653] [] vfs_readv+0x84/0xc0 [ 27.497659] [] do_readv+0xe6/0x250 [ 27.497665] [] ? vfs_readv+0xc0/0xc0 [ 27.497672] [] ? entry_SYSCALL_64_fastpath+0x5/0xc6 [ 27.497680] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 27.497687] [] SyS_readv+0x27/0x30 [ 27.497693] [] entry_SYSCALL_64_fastpath+0x23/0xc6 [ 27.497788] 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 [ 27.497795] RIP [] __free_pages+0x21/0x80 [ 27.497797] RSP [ 27.497805] ---[ end trace 2624c30b4afe684e ]--- [ 27.497809] Kernel panic - not syncing: Fatal exception [ 27.500305] Dumping ftrace buffer: [ 27.500307] (ftrace buffer empty) [ 27.500309] Kernel Offset: disabled [ 27.853193] Rebooting in 86400 seconds..