[....] Starting enhanced syslogd: rsyslogd[ 10.130329] audit: type=1400 audit(1514354193.061:4): avc: denied { syslog } for pid=3169 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-386-4,10.128.0.62' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 18.440547] kasan: CONFIG_KASAN_INLINE enabled [ 18.441269] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 18.442300] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 18.443135] Dumping ftrace buffer: [ 18.443607] (ftrace buffer empty) [ 18.444099] Modules linked in: [ 18.444570] CPU: 0 PID: 3323 Comm: syzkaller652417 Not tainted 4.9.71-g2506378 #9 [ 18.445565] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 18.446783] task: ffff8801c9d01800 task.stack: ffff8801c92b8000 [ 18.447578] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 18.448682] RSP: 0018:ffff8801c92bfa50 EFLAGS: 00010a07 [ 18.449398] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664deb [ 18.450349] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 18.451303] RBP: ffff8801c92bfa60 R08: 0000000000000001 R09: 0000000000000000 [ 18.452255] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 18.453204] R13: 0000000000000020 R14: ffff8801c9978000 R15: dffffc0000000000 [ 18.454155] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:000000000a030840 [ 18.455253] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 18.456028] CR2: 00000000205cbf70 CR3: 00000001c92a0000 CR4: 00000000001406f0 [ 18.456980] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 18.457930] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 18.458894] Stack: [ 18.459190] ffff8801c9d01800 ffff8801c9978158 ffff8801c92bfac0 ffffffff82664e11 [ 18.460314] ffff8801c9978170 ffffed003932f02b ffffed003932f02e ffff8801c9978168 [ 18.465769] dead4ead00000000 ffff8801c9978140 0000000000000000 0000000000000000 [ 18.473710] Call Trace: [ 18.476263] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 18.482718] [] sg_finish_rem_req+0x2b5/0x340 [ 18.488736] [] sg_new_read.isra.20+0x39/0x3e0 [ 18.494842] [] ? sg_get_rq_mark+0x142/0x190 [ 18.500775] [] sg_read+0x8bd/0x1440 [ 18.506015] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 18.512644] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 18.519707] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 18.526345] [] __vfs_read+0x103/0x670 [ 18.531760] [] ? default_llseek+0x290/0x290 [ 18.537693] [] ? fsnotify+0x86/0xf30 [ 18.543018] [] ? fsnotify+0xf30/0xf30 [ 18.548432] [] ? avc_policy_seqno+0x9/0x20 [ 18.554279] [] ? selinux_file_permission+0x82/0x460 [ 18.560908] [] ? security_file_permission+0x89/0x1e0 [ 18.567628] [] ? rw_verify_area+0xe5/0x2b0 [ 18.573474] [] vfs_read+0x11e/0x380 [ 18.578713] [] SyS_read+0xd9/0x1b0 [ 18.583866] [] ? vfs_copy_file_range+0x740/0x740 [ 18.590234] [] ? do_fast_syscall_32+0xcf/0x890 [ 18.596429] [] ? vfs_copy_file_range+0x740/0x740 [ 18.602803] [] do_fast_syscall_32+0x2f7/0x890 [ 18.608910] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 18.615539] [] entry_SYSENTER_compat+0x51/0x60 [ 18.621747] 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 [ 18.648072] RIP [] __free_pages+0x21/0x80 [ 18.653953] RSP [ 18.657919] ---[ end trace 6148e75c12340a51 ]--- [ 18.662666] Kernel panic - not syncing: Fatal exception [ 18.668419] Dumping ftrace buffer: [ 18.671930] (ftrace buffer empty) [ 18.675612] Kernel Offset: disabled [ 18.679205] Rebooting in 86400 seconds..