[....] Starting enhanced syslogd: rsyslogd[ 13.201793] audit: type=1400 audit(1514378904.800:4): 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 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 '10.128.0.37' (ECDSA) to the list of known hosts. syzkaller login: [ 30.515703] audit: type=1400 audit(1514378922.120:5): avc: denied { sys_admin } for pid=3329 comm="syzkaller872711" capability=21 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 [ 30.543946] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 30.603103] audit: type=1400 audit(1514378922.210:6): avc: denied { sys_chroot } for pid=3330 comm="syzkaller872711" capability=18 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=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 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 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 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 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 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 [ 31.235302] kasan: CONFIG_KASAN_INLINE enabled [ 31.239900] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 31.247253] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 31.253450] Dumping ftrace buffer: [ 31.256955] (ftrace buffer empty) [ 31.260634] Modules linked in: [ 31.263912] CPU: 0 PID: 3330 Comm: syzkaller872711 Not tainted 4.9.71-g2506378 #113 [ 31.271671] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.280992] task: ffff8801cbeb3000 task.stack: ffff8801c85b0000 [ 31.287014] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 31.295241] RSP: 0018:ffff8801c85b79b0 EFLAGS: 00010a07 [ 31.300657] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664deb [ 31.307892] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 31.315127] RBP: ffff8801c85b79c0 R08: 0000000000000001 R09: 0000000000000001 [ 31.322365] R10: 0000000000000000 R11: ffff8801cbeb3000 R12: 0000000000000004 [ 31.329603] R13: 0000000000000020 R14: ffff8801c096a100 R15: dffffc0000000000 [ 31.336844] FS: 0000000001e4f940(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 31.345035] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 31.350882] CR2: 0000000020dc8000 CR3: 00000001c98b4000 CR4: 00000000001406f0 [ 31.358120] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 31.365360] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 31.372596] Stack: [ 31.374713] ffffffff838af9b9 ffff8801c096a258 ffff8801c85b7a20 ffffffff82664e11 [ 31.382663] ffff8801c096a270 ffffed003812d44b ffffed003812d44e ffff8801c096a268 [ 31.390619] dead4ead00000000 ffff8801c096a240 0000000000000000 0000000000000000 [ 31.398571] Call Trace: [ 31.401127] [] ? retint_kernel+0x2d/0x2d [ 31.406806] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 31.413277] [] sg_finish_rem_req+0x2b5/0x340 [ 31.419304] [] sg_new_read.isra.20+0x356/0x3e0 [ 31.425499] [] ? sg_idr_max_id+0x3/0x60 [ 31.431087] [] sg_read+0x8bd/0x1440 [ 31.436329] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 31.442960] [] ? fsnotify+0xf30/0xf30 [ 31.448377] [] ? avc_policy_seqno+0x9/0x20 [ 31.454230] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 31.461217] [] ? security_file_permission+0x89/0x1e0 [ 31.467944] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 31.474583] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 31.481223] [] do_readv_writev+0x520/0x750 [ 31.487083] [] ? vfs_write+0x530/0x530 [ 31.492600] [] ? __pmd_alloc+0x410/0x410 [ 31.498284] [] ? __do_page_fault+0x5ec/0xd40 [ 31.504315] [] vfs_readv+0x84/0xc0 [ 31.509472] [] do_readv+0xe6/0x250 [ 31.514629] [] ? vfs_readv+0xc0/0xc0 [ 31.519959] [] ? entry_SYSCALL_64_fastpath+0x5/0xc6 [ 31.526591] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 31.533408] [] SyS_readv+0x27/0x30 [ 31.538562] [] entry_SYSCALL_64_fastpath+0x23/0xc6 [ 31.545102] 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 [ 31.571471] RIP [] __free_pages+0x21/0x80 [ 31.577354] RSP [ 31.581064] ---[ end trace c05f303b1f751bb5 ]--- [ 31.585822] Kernel panic - not syncing: Fatal exception [ 31.591554] Dumping ftrace buffer: [ 31.595064] (ftrace buffer empty) [ 31.598751] Kernel Offset: disabled [ 31.602345] Rebooting in 86400 seconds..