[....] Starting enhanced syslogd: rsyslogd[ 11.236753] audit: type=1400 audit(1515592243.866:4): avc: denied { syslog } for pid=3177 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 '10.128.0.22' (ECDSA) to the list of known hosts. syzkaller login: [ 38.325318] audit: type=1400 audit(1515592270.956:5): avc: denied { sys_admin } for pid=3343 comm="syzkaller774791" 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 [ 38.354303] 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 executing program [ 38.400256] audit: type=1400 audit(1515592271.036:6): avc: denied { sys_chroot } for pid=3344 comm="syzkaller774791" 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 39.049060] kasan: CONFIG_KASAN_INLINE enabled [ 39.053738] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 39.061130] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 39.067338] Dumping ftrace buffer: [ 39.070849] (ftrace buffer empty) [ 39.074531] Modules linked in: [ 39.077807] CPU: 0 PID: 3344 Comm: syzkaller774791 Not tainted 4.9.76-g9154940 #20 [ 39.087755] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.097252] task: ffff8801c8019800 task.stack: ffff8801c6b40000 [ 39.103277] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 39.111508] RSP: 0018:ffff8801c6b47940 EFLAGS: 00010a07 [ 39.116947] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff8266640b [ 39.124187] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 39.142548] RBP: ffff8801c6b47950 R08: 0000000000000001 R09: 0000000000000000 [ 39.149787] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 39.157038] R13: 0000000000000020 R14: ffff8801be7d8000 R15: dffffc0000000000 [ 39.164280] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000009bc0900 [ 39.172473] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 39.178334] CR2: 000000002064f000 CR3: 00000001c88c8000 CR4: 0000000000160670 [ 39.185575] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.192813] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.200046] Stack: [ 39.202164] ffff8801c8019800 ffff8801be7d8158 ffff8801c6b479b0 ffffffff82666431 [ 39.210120] ffff8801be7d8170 ffffed0037cfb02b ffffed0037cfb02e ffff8801be7d8168 [ 39.218082] dead4ead00000000 ffff8801be7d8140 0000000000000000 0000000000000000 [ 39.226045] Call Trace: [ 39.228604] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 39.235064] [] sg_finish_rem_req+0x2b5/0x340 [ 39.241086] [] sg_new_read.isra.20+0x39/0x3e0 [ 39.247196] [] ? sg_get_rq_mark+0x142/0x190 [ 39.253131] [] sg_read+0x8bd/0x1440 [ 39.258372] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 39.265004] [] ? fsnotify+0xf30/0xf30 [ 39.270419] [] ? avc_policy_seqno+0x9/0x20 [ 39.276286] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 39.283266] [] ? security_file_permission+0x89/0x1e0 [ 39.289984] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 39.296618] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 39.303253] [] compat_do_readv_writev+0x522/0x760 [ 39.309712] [] ? do_pwritev+0x1a0/0x1a0 [ 39.315305] [] ? _raw_spin_unlock+0x2c/0x50 [ 39.321245] [] ? handle_mm_fault+0x6ee/0x2530 [ 39.327357] [] ? __pmd_alloc+0x410/0x410 [ 39.333048] [] compat_readv+0xe3/0x150 [ 39.338553] [] do_compat_readv+0xf4/0x1d0 [ 39.344317] [] ? compat_readv+0x150/0x150 [ 39.350083] [] compat_SyS_readv+0x26/0x30 [ 39.355850] [] ? SyS_pwritev2+0x80/0x80 [ 39.361442] [] do_fast_syscall_32+0x2f7/0x890 [ 39.367554] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.374186] [] entry_SYSENTER_compat+0x74/0x83 [ 39.380381] 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 [ 39.409346] RIP [] __free_pages+0x21/0x80 [ 39.415228] RSP [ 39.419064] ---[ end trace 8a56260945d508ca ]--- [ 39.423824] Kernel panic - not syncing: Fatal exception [ 39.429586] Dumping ftrace buffer: [ 39.433106] (ftrace buffer empty) [ 39.436784] Kernel Offset: disabled [ 39.440378] Rebooting in 86400 seconds..