[....] Starting enhanced syslogd: rsyslogd[ 12.552337] audit: type=1400 audit(1514639755.120:4): 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 '10.128.0.57' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 36.536558] kasan: CONFIG_KASAN_INLINE enabled [ 36.541288] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 36.548666] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 36.554867] Dumping ftrace buffer: [ 36.558376] (ftrace buffer empty) [ 36.562054] Modules linked in: [ 36.565342] CPU: 0 PID: 3341 Comm: syzkaller566607 Not tainted 4.9.73-gf3f3457 #11 [ 36.573012] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.582336] task: ffff8801c985b000 task.stack: ffff8801c8b70000 [ 36.588357] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 36.596589] RSP: 0018:ffff8801c8b77a50 EFLAGS: 00010a07 [ 36.602001] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 36.609237] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 36.616482] RBP: ffff8801c8b77a60 R08: 0000000000000001 R09: 0000000000000000 [ 36.623726] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 36.630961] R13: 0000000000000020 R14: ffff8801c95d4200 R15: dffffc0000000000 [ 36.638200] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000094de840 [ 36.646391] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 36.652250] CR2: 0000000020001000 CR3: 00000001cd746000 CR4: 00000000001406f0 [ 36.659496] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.666738] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.673971] Stack: [ 36.676087] ffff8801c985b000 ffff8801c95d4358 ffff8801c8b77ac0 ffffffff82664fc1 [ 36.684051] ffff8801c95d4370 ffffed00392ba86b ffffed00392ba86e ffff8801c95d4368 [ 36.691998] dead4ead00000000 ffff8801c95d4340 0000000000000000 0000000000000000 [ 36.699946] Call Trace: [ 36.702502] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 36.708959] [] sg_finish_rem_req+0x2b5/0x340 [ 36.714981] [] sg_new_read.isra.20+0x39/0x3e0 [ 36.721097] [] ? sg_get_rq_mark+0x142/0x190 [ 36.727033] [] sg_read+0x8bd/0x1440 [ 36.732275] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 36.738909] [] ? lru_cache_add+0xd9/0x1e0 [ 36.744686] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 36.751753] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 36.758387] [] __vfs_read+0x103/0x670 [ 36.763818] [] ? default_llseek+0x290/0x290 [ 36.769761] [] ? fsnotify+0x86/0xf30 [ 36.775092] [] ? fsnotify+0xf30/0xf30 [ 36.780518] [] ? avc_policy_seqno+0x9/0x20 [ 36.786389] [] ? selinux_file_permission+0x82/0x460 [ 36.793107] [] ? security_file_permission+0x89/0x1e0 [ 36.799823] [] ? rw_verify_area+0xe5/0x2b0 [ 36.805671] [] vfs_read+0x11e/0x380 [ 36.810912] [] SyS_read+0xd9/0x1b0 [ 36.816067] [] ? vfs_copy_file_range+0x740/0x740 [ 36.822437] [] ? do_fast_syscall_32+0xcf/0x890 [ 36.828642] [] ? vfs_copy_file_range+0x740/0x740 [ 36.835012] [] do_fast_syscall_32+0x2f7/0x890 [ 36.841122] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.847765] [] entry_SYSENTER_compat+0x51/0x60 [ 36.853967] 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 [ 36.880333] RIP [] __free_pages+0x21/0x80 [ 36.886211] RSP [ 36.890077] ---[ end trace c36383b8018ba474 ]--- [ 36.894894] Kernel panic - not syncing: Fatal exception [ 36.900600] Dumping ftrace buffer: [ 36.904106] (ftrace buffer empty) [ 36.907789] Kernel Offset: disabled [ 36.911392] Rebooting in 86400 seconds..