[....] Starting enhanced syslogd: rsyslogd[ 10.481667] audit: type=1400 audit(1514336927.809:4): avc: denied { syslog } for pid=3179 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 'ci-android-49-kasan-gce-386-0,10.128.0.29' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 28.629135] kasan: CONFIG_KASAN_INLINE enabled [ 28.629869] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 28.630875] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 28.631696] Dumping ftrace buffer: [ 28.632170] (ftrace buffer empty) [ 28.632663] Modules linked in: [ 28.633132] CPU: 0 PID: 3336 Comm: syzkaller707217 Not tainted 4.9.71-g2506378 #9 [ 28.634128] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.635347] task: ffff8801ca8fb000 task.stack: ffff8801c0e28000 [ 28.636144] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 28.637279] RSP: 0018:ffff8801c0e2fa50 EFLAGS: 00010a07 [ 28.638009] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664deb [ 28.638978] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 28.639949] RBP: ffff8801c0e2fa60 R08: 0000000000000001 R09: 0000000000000000 [ 28.640899] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 28.641862] R13: 0000000000000020 R14: ffff8801c8502100 R15: dffffc0000000000 [ 28.642828] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000008cb2840 [ 28.643974] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 28.644780] CR2: 0000000020001000 CR3: 00000001cd415000 CR4: 00000000001406f0 [ 28.645766] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.646721] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.647690] Stack: [ 28.648004] ffff8801ca8fb000 ffff8801c8502258 ffff8801c0e2fac0 ffffffff82664e11 [ 28.649130] ffff8801c8502270 ffffed00390a044b ffffed00390a044e ffff8801c8502268 [ 28.654583] dead4ead00000000 ffff8801c8502240 0000000000000000 0000000000000000 [ 28.662530] Call Trace: [ 28.665097] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 28.671557] [] sg_finish_rem_req+0x2b5/0x340 [ 28.677580] [] sg_new_read.isra.20+0x39/0x3e0 [ 28.683690] [] ? sg_get_rq_mark+0x142/0x190 [ 28.689954] [] sg_read+0x8bd/0x1440 [ 28.695197] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 28.701828] [] ? lru_cache_add+0xd9/0x1e0 [ 28.707592] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 28.714662] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 28.721295] [] __vfs_read+0x103/0x670 [ 28.726721] [] ? default_llseek+0x290/0x290 [ 28.732662] [] ? fsnotify+0x86/0xf30 [ 28.737991] [] ? fsnotify+0xf30/0xf30 [ 28.743423] [] ? avc_policy_seqno+0x9/0x20 [ 28.749287] [] ? selinux_file_permission+0x82/0x460 [ 28.755927] [] ? security_file_permission+0x89/0x1e0 [ 28.762645] [] ? rw_verify_area+0xe5/0x2b0 [ 28.768497] [] vfs_read+0x11e/0x380 [ 28.773744] [] SyS_read+0xd9/0x1b0 [ 28.778900] [] ? vfs_copy_file_range+0x740/0x740 [ 28.785273] [] ? do_fast_syscall_32+0xcf/0x890 [ 28.791479] [] ? vfs_copy_file_range+0x740/0x740 [ 28.797853] [] do_fast_syscall_32+0x2f7/0x890 [ 28.803978] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.810612] [] entry_SYSENTER_compat+0x51/0x60 [ 28.816809] 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 [ 28.843114] RIP [] __free_pages+0x21/0x80 [ 28.848996] RSP [ 28.852834] ---[ end trace 22059a8ffa977b1b ]--- [ 28.857598] Kernel panic - not syncing: Fatal exception [ 28.863325] Dumping ftrace buffer: [ 28.866843] (ftrace buffer empty) [ 28.870522] Kernel Offset: disabled [ 28.874116] Rebooting in 86400 seconds..