[....] Starting enhanced syslogd: rsyslogd[ 11.008914] audit: type=1400 audit(1514329372.232:4): 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] 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 'ci-android-49-kasan-gce-386-2,10.128.0.15' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 19.760636] kasan: CONFIG_KASAN_INLINE enabled [ 19.761359] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 19.762350] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 19.763197] Dumping ftrace buffer: [ 19.763670] (ftrace buffer empty) [ 19.764164] Modules linked in: [ 19.764630] CPU: 0 PID: 3324 Comm: syzkaller974103 Not tainted 4.9.71-g2506378 #9 [ 19.765636] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 19.766874] task: ffff8801caba6000 task.stack: ffff8801c8970000 [ 19.767698] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 19.768873] RSP: 0018:ffff8801c8977a50 EFLAGS: 00010a07 [ 19.769612] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664deb [ 19.770632] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 19.771586] RBP: ffff8801c8977a60 R08: 0000000000000001 R09: 0000000000000000 [ 19.772576] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 19.773556] R13: 0000000000000020 R14: ffff8801d5e20000 R15: dffffc0000000000 [ 19.774508] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000008d8e840 [ 19.775599] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 19.776375] CR2: 0000000020001000 CR3: 00000001cc9e7000 CR4: 00000000001406f0 [ 19.777333] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 19.778284] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 19.779249] Stack: [ 19.779545] ffff8801caba6000 ffff8801d5e20158 ffff8801c8977ac0 ffffffff82664e11 [ 19.780692] ffff8801d5e20170 ffffed003abc402b ffffed003abc402e ffff8801d5e20168 [ 19.788361] dead4ead00000000 ffff8801d5e20140 0000000000000000 0000000000000000 [ 19.796307] Call Trace: [ 19.798861] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 19.805317] [] sg_finish_rem_req+0x2b5/0x340 [ 19.811340] [] sg_new_read.isra.20+0x39/0x3e0 [ 19.817448] [] ? sg_get_rq_mark+0x142/0x190 [ 19.823381] [] sg_read+0x8bd/0x1440 [ 19.828623] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 19.835254] [] ? lru_cache_add+0xd9/0x1e0 [ 19.841016] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 19.848081] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 19.854714] [] __vfs_read+0x103/0x670 [ 19.860129] [] ? default_llseek+0x290/0x290 [ 19.866063] [] ? fsnotify+0x86/0xf30 [ 19.871391] [] ? fsnotify+0xf30/0xf30 [ 19.876811] [] ? avc_policy_seqno+0x9/0x20 [ 19.882668] [] ? selinux_file_permission+0x82/0x460 [ 19.889297] [] ? security_file_permission+0x89/0x1e0 [ 19.896014] [] ? rw_verify_area+0xe5/0x2b0 [ 19.901863] [] vfs_read+0x11e/0x380 [ 19.907106] [] SyS_read+0xd9/0x1b0 [ 19.912259] [] ? vfs_copy_file_range+0x740/0x740 [ 19.918631] [] ? do_fast_syscall_32+0xcf/0x890 [ 19.924832] [] ? vfs_copy_file_range+0x740/0x740 [ 19.931204] [] do_fast_syscall_32+0x2f7/0x890 [ 19.937314] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 19.943948] [] entry_SYSENTER_compat+0x51/0x60 [ 19.950140] 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 [ 19.976485] RIP [] __free_pages+0x21/0x80 [ 19.982364] RSP [ 19.986446] ---[ end trace 9855306c3fb4462c ]--- [ 19.991191] Kernel panic - not syncing: Fatal exception [ 19.996961] Dumping ftrace buffer: [ 20.000469] (ftrace buffer empty) [ 20.004146] Kernel Offset: disabled [ 20.007737] Rebooting in 86400 seconds..