[....] Starting enhanced syslogd: rsyslogd[ 10.131075] audit: type=1400 audit(1514764330.123:4): avc: denied { syslog } for pid=3176 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 '10.128.15.224' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 20.787323] kasan: CONFIG_KASAN_INLINE enabled [ 20.788002] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 20.788968] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 20.789798] Dumping ftrace buffer: [ 20.790271] (ftrace buffer empty) [ 20.790763] Modules linked in: [ 20.791227] CPU: 1 PID: 3331 Comm: syzkaller529403 Not tainted 4.9.73-gf3f3457 #11 [ 20.792234] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 20.793633] task: ffff8801cc348000 task.stack: ffff8801c8280000 [ 20.794444] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 20.795553] RSP: 0018:ffff8801c8287a50 EFLAGS: 00010a07 [ 20.796310] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 20.797260] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 20.798227] RBP: ffff8801c8287a60 R08: 0000000000000001 R09: 0000000000000000 [ 20.799232] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 20.800326] R13: 0000000000000020 R14: ffff8801c80a2100 R15: dffffc0000000000 [ 20.801276] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:0000000009b19840 [ 20.802444] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 20.803342] CR2: 0000000020001000 CR3: 00000001c884c000 CR4: 00000000001406e0 [ 20.804312] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 20.805264] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 20.806232] Stack: [ 20.806586] ffff8801cc348000 ffff8801c80a2258 ffff8801c8287ac0 ffffffff82664fc1 [ 20.810394] ffff8801c80a2270 ffffed003901444b ffffed003901444e ffff8801c80a2268 [ 20.818346] dead4ead00000000 ffff8801c80a2240 0000000000000000 0000000000000000 [ 20.826306] Call Trace: [ 20.828863] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 20.835320] [] sg_finish_rem_req+0x2b5/0x340 [ 20.841348] [] sg_new_read.isra.20+0x39/0x3e0 [ 20.847458] [] ? sg_get_rq_mark+0x142/0x190 [ 20.853393] [] sg_read+0x8bd/0x1440 [ 20.858635] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 20.865278] [] ? lru_cache_add+0xd9/0x1e0 [ 20.871061] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 20.878125] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 20.884754] [] __vfs_read+0x103/0x670 [ 20.890167] [] ? default_llseek+0x290/0x290 [ 20.896104] [] ? fsnotify+0x86/0xf30 [ 20.901428] [] ? fsnotify+0xf30/0xf30 [ 20.906843] [] ? avc_policy_seqno+0x9/0x20 [ 20.912693] [] ? selinux_file_permission+0x82/0x460 [ 20.919322] [] ? security_file_permission+0x89/0x1e0 [ 20.926038] [] ? rw_verify_area+0xe5/0x2b0 [ 20.931884] [] vfs_read+0x11e/0x380 [ 20.937132] [] SyS_read+0xd9/0x1b0 [ 20.942285] [] ? vfs_copy_file_range+0x740/0x740 [ 20.948653] [] ? do_fast_syscall_32+0xcf/0x890 [ 20.954848] [] ? vfs_copy_file_range+0x740/0x740 [ 20.961214] [] do_fast_syscall_32+0x2f7/0x890 [ 20.967323] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 20.973954] [] entry_SYSENTER_compat+0x51/0x60 [ 20.980146] 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 [ 21.006396] RIP [] __free_pages+0x21/0x80 [ 21.012272] RSP [ 21.016043] ---[ end trace 5d4b72a7ff7fecbb ]--- [ 21.020778] Kernel panic - not syncing: Fatal exception [ 21.026586] Dumping ftrace buffer: [ 21.030094] (ftrace buffer empty) [ 21.033769] Kernel Offset: disabled [ 21.037364] Rebooting in 86400 seconds..