[....] Starting enhanced syslogd: rsyslogd[ 13.232109] audit: type=1400 audit(1514757422.435:4): 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[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 '10.128.15.225' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 28.073325] kasan: CONFIG_KASAN_INLINE enabled [ 28.077939] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 28.085757] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 28.091969] Dumping ftrace buffer: [ 28.095476] (ftrace buffer empty) [ 28.099154] Modules linked in: [ 28.102428] CPU: 0 PID: 3328 Comm: syzkaller562825 Not tainted 4.9.73-gf3f3457 #11 [ 28.110104] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.119432] task: ffff8801ca6f0000 task.stack: ffff8801c7858000 [ 28.125451] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 28.133678] RSP: 0018:ffff8801c785fa50 EFLAGS: 00010a07 [ 28.139104] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 28.146349] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 28.153585] RBP: ffff8801c785fa60 R08: 0000000000000001 R09: 0000000000000000 [ 28.160828] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 28.168072] R13: 0000000000000020 R14: ffff8801c8af8000 R15: dffffc0000000000 [ 28.175308] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:000000000815f840 [ 28.183499] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 28.189352] CR2: 0000000020001000 CR3: 00000001c9a7d000 CR4: 00000000001406f0 [ 28.196594] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.203830] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.211066] Stack: [ 28.213180] ffff8801ca6f0000 ffff8801c8af8158 ffff8801c785fac0 ffffffff82664fc1 [ 28.221124] ffff8801c8af8170 ffffed003915f02b ffffed003915f02e ffff8801c8af8168 [ 28.229073] dead4ead00000000 ffff8801c8af8140 0000000000000000 0000000000000000 [ 28.237039] Call Trace: [ 28.239603] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 28.246061] [] sg_finish_rem_req+0x2b5/0x340 [ 28.252085] [] sg_new_read.isra.20+0x39/0x3e0 [ 28.258194] [] ? sg_get_rq_mark+0x142/0x190 [ 28.264129] [] sg_read+0x8bd/0x1440 [ 28.269370] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 28.276004] [] ? lru_cache_add+0xd9/0x1e0 [ 28.281778] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 28.288843] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 28.295484] [] __vfs_read+0x103/0x670 [ 28.301427] [] ? default_llseek+0x290/0x290 [ 28.307367] [] ? fsnotify+0x86/0xf30 [ 28.312704] [] ? fsnotify+0xf30/0xf30 [ 28.318134] [] ? avc_policy_seqno+0x9/0x20 [ 28.323993] [] ? selinux_file_permission+0x82/0x460 [ 28.330624] [] ? security_file_permission+0x89/0x1e0 [ 28.337345] [] ? rw_verify_area+0xe5/0x2b0 [ 28.343196] [] vfs_read+0x11e/0x380 [ 28.348441] [] SyS_read+0xd9/0x1b0 [ 28.353610] [] ? vfs_copy_file_range+0x740/0x740 [ 28.359992] [] ? do_fast_syscall_32+0xcf/0x890 [ 28.366195] [] ? vfs_copy_file_range+0x740/0x740 [ 28.372566] [] do_fast_syscall_32+0x2f7/0x890 [ 28.378676] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.385316] [] entry_SYSENTER_compat+0x51/0x60 [ 28.391511] 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 [ 28.417795] RIP [] __free_pages+0x21/0x80 [ 28.423669] RSP [ 28.427737] ---[ end trace cf66257f9072eaeb ]--- [ 28.432553] Kernel panic - not syncing: Fatal exception [ 28.437934] Dumping ftrace buffer: [ 28.441443] (ftrace buffer empty) [ 28.445121] Kernel Offset: disabled [ 28.448718] Rebooting in 86400 seconds..