[....] Starting enhanced syslogd: rsyslogd[ 10.574658] audit: type=1400 audit(1514297437.661:4): avc: denied { syslog } for pid=3173 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-0,10.128.0.50' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 syzkaller login: [ 28.945740] IPVS: Creating netns size=2536 id=1 net.ipv6.conf.syz5.accept_dad = 0 net.ipv6.conf.syz5.router_solicitations = 0 executing program executing program [ 28.972582] IPVS: Creating netns size=2536 id=2 executing program executing program executing program executing program net.ipv6.conf.syz6.accept_dad = 0 net.ipv6.conf.syz6.router_solicitations = 0 [ 29.004725] IPVS: Creating netns size=2536 id=3 executing program executing program executing program net.ipv6.conf.syz4.accept_dad = 0 [ 29.041006] IPVS: Creating netns size=2536 id=4 executing program executing program net.ipv6.conf.syz4.router_solicitations = 0 executing program net.ipv6.conf.syz7.accept_dad = 0 executing program executing program executing program net.ipv6.conf.syz7.router_solicitations = 0 [ 29.076413] IPVS: Creating netns size=2536 id=5 executing program executing program executing program net.ipv6.conf.syz3.accept_dad = 0 executing program executing program executing program [ 29.120864] IPVS: Creating netns size=2536 id=6 executing program net.ipv6.conf.syz3.router_solicitations = 0 executing program executing program executing program [ 29.162240] IPVS: Creating netns size=2536 id=7 net.ipv6.conf.syz2.accept_dad = 0 executing program executing program executing program net.ipv6.conf.syz2.router_solicitations = 0 executing program executing program executing program executing program executing program executing program [ 29.223063] IPVS: Creating netns size=2536 id=8 executing program executing program executing program executing program executing program net.ipv6.conf.syz1.accept_dad = 0 executing program executing program executing program executing program net.ipv6.conf.syz1.router_solicitations = 0 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 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 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 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 29.713969] kasan: CONFIG_KASAN_INLINE enabled [ 29.718808] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 29.732493] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 29.738730] Dumping ftrace buffer: [ 29.742234] (ftrace buffer empty) [ 29.745910] Modules linked in: [ 29.749181] CPU: 0 PID: 3420 Comm: syzkaller224043 Not tainted 4.9.71-g2506378 #113 executing program executing program executing program executing program [ 29.756938] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.766260] task: ffff8801c8533000 task.stack: ffff8801c37b8000 [ 29.772278] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 29.780505] RSP: 0018:ffff8801c37bfa00 EFLAGS: 00010a07 [ 29.785916] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664deb [ 29.793151] RDX: 1bd5a9d5a0000003 RSI: 0000000000000000 RDI: dead4ead0000001c [ 29.800386] RBP: ffff8801c37bfa10 R08: 0000000000000000 R09: ffffed0037bfc465 executing program executing program executing program executing program executing program [ 29.807623] R10: 0000000000000005 R11: ffffed0037bfc464 R12: 0000000000000004 [ 29.814855] R13: 0000000000000020 R14: ffff8801be54a100 R15: dffffc0000000000 [ 29.822090] FS: 00007f8db3919700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 29.830278] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.836121] CR2: 0000000020783fe0 CR3: 00000001c9194000 CR4: 00000000001406f0 [ 29.843357] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.850590] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.857823] Stack: executing program executing program executing program executing program executing program [ 29.859934] 0000000000000001 ffff8801be54a258 ffff8801c37bfa70 ffffffff82664e11 [ 29.867878] ffff8801be54a270 ffffed0037ca944b ffffed0037ca944e ffff8801be54a268 [ 29.875834] dead4ead00000000 ffff8801be54a240 0000000000000000 0000000000000000 [ 29.883775] Call Trace: [ 29.886327] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 29.892816] [] sg_finish_rem_req+0x2b5/0x340 [ 29.898836] [] sg_read+0xa1c/0x1440 [ 29.904075] [] ? sg_proc_seq_show_debug+0xd10/0xd10 executing program executing program executing program [ 29.910705] [] ? fsnotify+0xf30/0xf30 [ 29.916119] [] ? avc_policy_seqno+0x9/0x20 [ 29.921966] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 29.928950] [] ? security_file_permission+0x89/0x1e0 [ 29.935667] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 29.942298] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 29.948936] [] do_readv_writev+0x520/0x750 [ 29.954785] [] ? vfs_write+0x530/0x530 executing program executing program executing program [ 29.960286] [] ? __fget+0x201/0x3a0 [ 29.965524] [] ? __fget+0x228/0x3a0 [ 29.970765] [] ? __fget+0x47/0x3a0 [ 29.975919] [] vfs_readv+0x84/0xc0 [ 29.981071] [] do_readv+0xe6/0x250 [ 29.986223] [] ? vfs_readv+0xc0/0xc0 [ 29.991550] [] ? entry_SYSCALL_64_fastpath+0x5/0xc6 [ 29.998181] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 30.004992] [] SyS_readv+0x27/0x30 executing program executing program executing program executing program executing program [ 30.010150] [] entry_SYSCALL_64_fastpath+0x23/0xc6 [ 30.016689] 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 [ 30.042938] RIP [] __free_pages+0x21/0x80 [ 30.048811] RSP [ 30.058997] ---[ end trace 543118309bd75ba2 ]--- [ 30.065104] Kernel panic - not syncing: Fatal exception [ 30.070787] Dumping ftrace buffer: [ 30.074296] (ftrace buffer empty) [ 30.077973] Kernel Offset: disabled [ 30.081566] Rebooting in 86400 seconds..