[....] Starting enhanced syslogd: rsyslogd[ 13.227491] audit: type=1400 audit(1514658026.982:4): avc: denied { syslog } for pid=3175 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[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.15.199' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 50.310281] kasan: CONFIG_KASAN_INLINE enabled [ 50.315011] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 50.322413] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 50.328631] Dumping ftrace buffer: [ 50.332141] (ftrace buffer empty) [ 50.335821] Modules linked in: [ 50.339107] CPU: 0 PID: 3348 Comm: syzkaller038850 Not tainted 4.9.73-gf3f3457 #11 [ 50.346779] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.356113] task: ffff8801cab31800 task.stack: ffff8801c9f50000 [ 50.362134] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 50.370373] RSP: 0018:ffff8801c9f57a50 EFLAGS: 00010a07 [ 50.375855] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 50.383093] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 50.390332] RBP: ffff8801c9f57a60 R08: 0000000000000001 R09: 0000000000000000 [ 50.397663] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 50.404908] R13: 0000000000000020 R14: ffff8801ca3d4200 R15: dffffc0000000000 [ 50.412145] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:000000000943a840 [ 50.420336] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 50.426190] CR2: 0000000020001000 CR3: 00000001c98bf000 CR4: 00000000001406f0 [ 50.433430] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 50.440667] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 50.447903] Stack: [ 50.450017] ffff8801cab31800 ffff8801ca3d4358 ffff8801c9f57ac0 ffffffff82664fc1 [ 50.457976] ffff8801ca3d4370 ffffed003947a86b ffffed003947a86e ffff8801ca3d4368 [ 50.465942] dead4ead00000000 ffff8801ca3d4340 0000000000000000 0000000000000000 [ 50.473894] Call Trace: [ 50.476448] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 50.482906] [] sg_finish_rem_req+0x2b5/0x340 [ 50.488942] [] sg_new_read.isra.20+0x39/0x3e0 [ 50.495064] [] ? sg_get_rq_mark+0x142/0x190 [ 50.501007] [] sg_read+0x8bd/0x1440 [ 50.506256] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 50.512902] [] ? lru_cache_add+0xd9/0x1e0 [ 50.518667] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 50.525752] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 50.532386] [] __vfs_read+0x103/0x670 [ 50.537803] [] ? default_llseek+0x290/0x290 [ 50.543741] [] ? fsnotify+0x86/0xf30 [ 50.549071] [] ? fsnotify+0xf30/0xf30 [ 50.554489] [] ? avc_policy_seqno+0x9/0x20 [ 50.560341] [] ? selinux_file_permission+0x82/0x460 [ 50.566973] [] ? security_file_permission+0x89/0x1e0 [ 50.573692] [] ? rw_verify_area+0xe5/0x2b0 [ 50.579541] [] vfs_read+0x11e/0x380 [ 50.584781] [] SyS_read+0xd9/0x1b0 [ 50.589938] [] ? vfs_copy_file_range+0x740/0x740 [ 50.596309] [] ? do_fast_syscall_32+0xcf/0x890 [ 50.602508] [] ? vfs_copy_file_range+0x740/0x740 [ 50.608888] [] do_fast_syscall_32+0x2f7/0x890 [ 50.615000] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 50.621650] [] entry_SYSENTER_compat+0x51/0x60 [ 50.627844] 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 [ 50.654205] RIP [] __free_pages+0x21/0x80 [ 50.660083] RSP [ 50.666476] ---[ end trace b24b279619b972cb ]--- [ 50.671369] Kernel panic - not syncing: Fatal exception [ 50.676744] Dumping ftrace buffer: [ 50.680252] (ftrace buffer empty) [ 50.683940] Kernel Offset: disabled [ 50.687537] Rebooting in 86400 seconds..