[....] Starting enhanced syslogd: rsyslogd[ 11.818422] audit: type=1400 audit(1516464243.702:4): avc: denied { syslog } for pid=3199 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 OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.15.217' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program syzkaller login: [ 28.876389] IPVS: Creating netns size=2536 id=1 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 [ 28.897826] IPVS: Creating netns size=2536 id=2 [ 28.930378] IPVS: Creating netns size=2536 id=3 [ 28.933501] kasan: CONFIG_KASAN_INLINE enabled [ 28.933503] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 28.933512] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 28.933517] Dumping ftrace buffer: [ 28.933520] (ftrace buffer empty) [ 28.933523] Modules linked in: [ 28.933528] CPU: 1 PID: 3375 Comm: syzkaller277657 Not tainted 4.9.77-ge12a9c4 #18 [ 28.933531] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.933534] task: ffff8801c8b21800 task.stack: ffff8801c7578000 [ 28.933550] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 28.933552] RSP: 0018:ffff8801c757f9b0 EFLAGS: 00010a07 [ 28.933555] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff8266751b [ 28.933557] RDX: 1bd5a9d5a0000003 RSI: 0000000000000002 RDI: dead4ead0000001c [ 28.933559] RBP: ffff8801c757f9c0 R08: 0000000048000000 R09: 0000000000001e30 [ 28.933562] R10: 0000000000002100 R11: ffff8801c8b21800 R12: 0000000000000004 [ 28.933564] R13: 0000000000000020 R14: ffff8801cd8fc200 R15: dffffc0000000000 [ 28.933567] FS: 00007f4aad5ab700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 28.933570] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.933572] CR2: 0000000020a13000 CR3: 00000001c89e0000 CR4: 0000000000160670 [ 28.933577] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.933579] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.933580] Stack: [ 28.933585] 0000000000000001 ffff8801cd8fc358 ffff8801c757fa20 ffffffff82667541 [ 28.933590] ffff8801cd8fc370 ffffed0039b1f86b ffffed0039b1f86e ffff8801cd8fc368 [ 28.933595] dead4ead00000000 ffff8801cd8fc340 0000000000000000 0000000000000000 [ 28.933596] Call Trace: [ 28.933604] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 28.933608] [] sg_finish_rem_req+0x2b5/0x340 [ 28.933612] [] sg_new_read.isra.20+0x18d/0x3e0 [ 28.933615] [] sg_read+0x8bd/0x1440 [ 28.933619] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 28.933624] [] ? fsnotify+0xf30/0xf30 [ 28.933632] [] ? avc_policy_seqno+0x9/0x20 [ 28.933639] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 28.933643] [] ? security_file_permission+0x89/0x1e0 [ 28.933647] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 28.933650] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 28.933655] [] do_readv_writev+0x520/0x750 [ 28.933658] [] ? vfs_write+0x530/0x530 [ 28.933667] [] ? check_preemption_disabled+0x3b/0x200 [ 28.933672] [] ? __fget+0x201/0x3a0 [ 28.933675] [] ? __fget+0x228/0x3a0 [ 28.933678] [] ? __fget+0x47/0x3a0 [ 28.933682] [] vfs_readv+0x84/0xc0 [ 28.933686] [] do_readv+0xe6/0x250 [ 28.933689] [] ? vfs_readv+0xc0/0xc0 [ 28.933696] [] ? entry_SYSCALL_64_fastpath+0x5/0xe8 [ 28.933704] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 28.933708] [] SyS_readv+0x27/0x30 [ 28.933712] [] entry_SYSCALL_64_fastpath+0x29/0xe8 [ 28.933768] 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 [ 28.933772] RIP [] __free_pages+0x21/0x80 [ 28.933773] RSP [ 28.933780] ---[ end trace 031083416297df9c ]--- [ 28.933783] Kernel panic - not syncing: Fatal exception [ 28.935477] Dumping ftrace buffer: [ 28.935479] (ftrace buffer empty) [ 28.935481] Kernel Offset: disabled [ 29.292368] Rebooting in 86400 seconds..