[....] Starting enhanced syslogd: rsyslogd[ 14.422171] audit: type=1400 audit(1520457345.749:4): avc: denied { syslog } for pid=3653 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 '10.128.0.38' (ECDSA) to the list of known hosts. net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 syzkaller login: [ 30.696031] IPVS: Creating netns size=2536 id=1 RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: Operation not supported Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "vcan0" RTNETLINK answers: Operation not supported Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "bond0" Cannot find device "bond0" Cannot find device "bond0" Cannot find device "bond0" Cannot find device "veth0" Cannot find device "veth0" Cannot find device "veth0" Cannot find device "veth0" Cannot find device "veth1" Cannot find device "veth1" Cannot find device "veth1" Cannot find device "veth1" executing program [ 31.397410] kasan: CONFIG_KASAN_INLINE enabled [ 31.402042] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 31.409744] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 31.415949] Dumping ftrace buffer: [ 31.419471] (ftrace buffer empty) [ 31.423151] Modules linked in: [ 31.426436] CPU: 0 PID: 4081 Comm: syzkaller844538 Not tainted 4.9.86-gd3a2afb #51 [ 31.434123] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.443472] task: ffff8801d50ab000 task.stack: ffff8801d46d0000 [ 31.449512] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 31.457754] RSP: 0018:ffff8801d46d7ab0 EFLAGS: 00010a07 [ 31.463175] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82668edb [ 31.470416] RDX: 1bd5a9d5a0000003 RSI: 0000000000000000 RDI: dead4ead0000001c [ 31.477659] RBP: ffff8801d46d7ac0 R08: ffffed003af19790 R09: 0000000000000000 [ 31.484903] R10: fffbe15000000000 R11: ffffed003af19790 R12: 0000000000000004 [ 31.492163] R13: 0000000000000020 R14: ffff8801d7f94200 R15: dffffc0000000000 [ 31.499408] FS: 00007f1ba3da1700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 31.507606] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 31.513471] CR2: 0000000020005000 CR3: 00000001da2c6000 CR4: 0000000000160670 [ 31.520715] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 31.527965] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 31.535218] Stack: [ 31.537355] 0000000000000000 ffff8801d7f94358 ffff8801d46d7b20 ffffffff82668f01 [ 31.545336] ffff8801d7f94370 ffffed003aff286b ffffed003aff286e ffff8801d7f94368 [ 31.553326] dead4ead00000000 ffff8801d7f94340 0000000000000000 0000000000000000 [ 31.561308] Call Trace: [ 31.563877] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 31.570343] [] sg_finish_rem_req+0x2b5/0x340 [ 31.576371] [] sg_read+0xa16/0x1440 [ 31.581615] [] ? sg_proc_seq_show_debug+0xd90/0xd90 [ 31.588257] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 31.595241] [] ? sg_proc_seq_show_debug+0xd90/0xd90 [ 31.601880] [] __vfs_read+0x103/0x670 [ 31.607299] [] ? default_llseek+0x290/0x290 [ 31.613241] [] ? fsnotify+0x86/0xf30 [ 31.618573] [] ? fsnotify+0xf30/0xf30 [ 31.623996] [] ? avc_policy_seqno+0x9/0x20 [ 31.629850] [] ? selinux_file_permission+0x82/0x460 [ 31.636486] [] ? security_file_permission+0x89/0x1e0 [ 31.643220] [] ? rw_verify_area+0xe5/0x2b0 [ 31.649079] [] vfs_read+0x11e/0x380 [ 31.654327] [] SyS_read+0xd9/0x1b0 [ 31.659487] [] ? vfs_copy_file_range+0x740/0x740 [ 31.665864] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 31.672678] [] ? do_syscall_64+0x48/0x490 [ 31.678459] [] ? vfs_copy_file_range+0x740/0x740 [ 31.684837] [] do_syscall_64+0x1a4/0x490 [ 31.690521] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 31.697422] 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 [ 31.724261] RIP [] __free_pages+0x21/0x80 [ 31.730149] RSP [ 31.734339] ---[ end trace 0d83279b7d1dd0fa ]--- [ 31.739129] Kernel panic - not syncing: Fatal exception [ 31.744964] Dumping ftrace buffer: [ 31.748486] (ftrace buffer empty) [ 31.752172] Kernel Offset: disabled [ 31.755782] Rebooting in 86400 seconds..