[....] Starting enhanced syslogd: rsyslogd[ 11.070901] audit: type=1400 audit(1514423880.441:4): avc: denied { syslog } for pid=3182 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 '10.128.0.31' (ECDSA) to the list of known hosts. syzkaller login: [ 19.706329] audit: type=1400 audit(1514423889.071:5): avc: denied { sys_admin } for pid=3330 comm="syzkaller670719" 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 [ 19.725351] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 19.770738] audit: type=1400 audit(1514423889.141:6): avc: denied { sys_chroot } for pid=3331 comm="syzkaller670719" 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 [ 20.105398] kasan: CONFIG_KASAN_INLINE enabled [ 20.109998] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 20.117383] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 20.125585] Dumping ftrace buffer: [ 20.129783] (ftrace buffer empty) [ 20.133459] Modules linked in: [ 20.136734] CPU: 0 PID: 3331 Comm: syzkaller670719 Not tainted 4.9.72-gcb7518e #114 [ 20.144493] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 20.153811] task: ffff8801c9201800 task.stack: ffff8801c8258000 [ 20.159830] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 20.170520] RSP: 0018:ffff8801c825f9b0 EFLAGS: 00010a07 [ 20.177060] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 20.184555] RDX: 1bd5a9d5a0000003 RSI: 0000000000000002 RDI: dead4ead0000001c [ 20.191791] RBP: ffff8801c825f9c0 R08: 0000000000000001 R09: 0000000000000000 [ 20.199023] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 20.206258] R13: 0000000000000020 R14: ffff8801c0104200 R15: dffffc0000000000 [ 20.214100] FS: 0000000001606880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 20.222375] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 20.228221] CR2: 0000000020bb7000 CR3: 00000001cbacc000 CR4: 00000000001406f0 [ 20.235716] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 20.242949] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 20.250181] Stack: [ 20.252295] ffff8801c9201800 ffff8801c0104358 ffff8801c825fa20 ffffffff82664fc1 [ 20.260232] ffff8801c0104370 ffffed003802086b ffffed003802086e ffff8801c0104368 [ 20.268173] dead4ead00000000 ffff8801c0104340 0000000000000000 0000000000000000 [ 20.276151] Call Trace: [ 20.278703] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 20.285165] [] sg_finish_rem_req+0x2b5/0x340 [ 20.291190] [] sg_new_read.isra.20+0x39/0x3e0 [ 20.297296] [] ? sg_get_rq_mark+0x142/0x190 [ 20.303228] [] sg_read+0x8bd/0x1440 [ 20.308468] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 20.315098] [] ? fsnotify+0xf30/0xf30 [ 20.320513] [] ? avc_policy_seqno+0x9/0x20 [ 20.326471] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 20.333465] [] ? security_file_permission+0x89/0x1e0 [ 20.340184] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 20.346819] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 20.353449] [] do_readv_writev+0x520/0x750 [ 20.359307] [] ? vfs_write+0x530/0x530 [ 20.364812] [] ? __pmd_alloc+0x410/0x410 [ 20.370488] [] ? __do_page_fault+0x5ec/0xd40 [ 20.376521] [] vfs_readv+0x84/0xc0 [ 20.381689] [] do_readv+0xe6/0x250 [ 20.386854] [] ? vfs_readv+0xc0/0xc0 [ 20.392186] [] ? entry_SYSCALL_64_fastpath+0x5/0xc6 [ 20.398819] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 20.406063] [] SyS_readv+0x27/0x30 [ 20.411231] [] entry_SYSCALL_64_fastpath+0x23/0xc6 [ 20.417773] 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 [ 20.444046] RIP [] __free_pages+0x21/0x80 [ 20.449922] RSP [ 20.453621] ---[ end trace 68d6f69eef0abafd ]--- [ 20.458365] Kernel panic - not syncing: Fatal exception [ 20.464100] Dumping ftrace buffer: [ 20.467607] (ftrace buffer empty) [ 20.471286] Kernel Offset: disabled [ 20.474884] Rebooting in 86400 seconds..