[....] Starting enhanced syslogd: rsyslogd[ 11.103557] audit: type=1400 audit(1514832004.069:4): avc: denied { syslog } for pid=3188 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 '10.128.0.50' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 22.799359] kasan: CONFIG_KASAN_INLINE enabled [ 22.803968] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 22.811448] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 22.817665] Dumping ftrace buffer: [ 22.821188] (ftrace buffer empty) [ 22.824868] Modules linked in: [ 22.828146] CPU: 1 PID: 3344 Comm: syzkaller458173 Not tainted 4.9.73-gf3f3457 #11 [ 22.835818] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.845143] task: ffff8801cb641800 task.stack: ffff8801c5b48000 [ 22.851165] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 22.859399] RSP: 0018:ffff8801c5b4fa50 EFLAGS: 00010a07 [ 22.864814] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 22.872061] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 22.879306] RBP: ffff8801c5b4fa60 R08: 0000000000000001 R09: 0000000000000000 [ 22.886543] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 22.893788] R13: 0000000000000020 R14: ffff8801c88ea100 R15: dffffc0000000000 [ 22.901027] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000099f1840 [ 22.909221] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 22.915068] CR2: 0000000020001000 CR3: 00000001c8d6e000 CR4: 00000000001406e0 [ 22.922308] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.929548] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.936802] Stack: [ 22.938920] ffff8801cb641800 ffff8801c88ea258 ffff8801c5b4fac0 ffffffff82664fc1 [ 22.946904] ffff8801c88ea270 ffffed003911d44b ffffed003911d44e ffff8801c88ea268 [ 22.954871] dead4ead00000000 ffff8801c88ea240 0000000000000000 0000000000000000 [ 22.962827] Call Trace: [ 22.965388] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 22.971848] [] sg_finish_rem_req+0x2b5/0x340 [ 22.977870] [] sg_new_read.isra.20+0x39/0x3e0 [ 22.984005] [] ? sg_get_rq_mark+0x142/0x190 [ 22.989965] [] sg_read+0x8bd/0x1440 [ 22.995216] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 23.001855] [] ? lru_cache_add+0xd9/0x1e0 [ 23.007631] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 23.014719] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 23.021357] [] __vfs_read+0x103/0x670 [ 23.026775] [] ? default_llseek+0x290/0x290 [ 23.032713] [] ? fsnotify+0x86/0xf30 [ 23.038043] [] ? fsnotify+0xf30/0xf30 [ 23.043463] [] ? avc_policy_seqno+0x9/0x20 [ 23.049328] [] ? selinux_file_permission+0x82/0x460 [ 23.055963] [] ? security_file_permission+0x89/0x1e0 [ 23.062683] [] ? rw_verify_area+0xe5/0x2b0 [ 23.068535] [] vfs_read+0x11e/0x380 [ 23.073787] [] SyS_read+0xd9/0x1b0 [ 23.078953] [] ? vfs_copy_file_range+0x740/0x740 [ 23.085325] [] ? do_fast_syscall_32+0xcf/0x890 [ 23.091523] [] ? vfs_copy_file_range+0x740/0x740 [ 23.097895] [] do_fast_syscall_32+0x2f7/0x890 [ 23.104005] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 23.110649] [] entry_SYSENTER_compat+0x51/0x60 [ 23.116853] 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 [ 23.143274] RIP [] __free_pages+0x21/0x80 [ 23.149164] RSP [ 23.153055] ---[ end trace 61338488bd203702 ]--- [ 23.157914] Kernel panic - not syncing: Fatal exception [ 23.163283] Dumping ftrace buffer: [ 23.166792] (ftrace buffer empty) [ 23.170469] Kernel Offset: disabled [ 23.174073] Rebooting in 86400 seconds..