[....] Starting enhanced syslogd: rsyslogd[ 10.814917] audit: type=1400 audit(1514323593.364:4): avc: denied { syslog } for pid=3191 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-386-4,10.128.0.82' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 23.253810] kasan: CONFIG_KASAN_INLINE enabled [ 23.254620] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 23.255605] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 23.256463] Dumping ftrace buffer: [ 23.256936] (ftrace buffer empty) [ 23.257431] Modules linked in: [ 23.257910] CPU: 0 PID: 3347 Comm: syzkaller788904 Not tainted 4.9.71-g2506378 #9 [ 23.258909] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.260138] task: ffff8801ca1e4800 task.stack: ffff8801c84a8000 [ 23.260933] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 23.262040] RSP: 0018:ffff8801c84afa50 EFLAGS: 00010a07 [ 23.262777] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664deb [ 23.263728] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 23.264679] RBP: ffff8801c84afa60 R08: 0000000000000001 R09: 0000000000000000 [ 23.265630] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 23.266582] R13: 0000000000000020 R14: ffff8801c9de0000 R15: dffffc0000000000 [ 23.267551] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000083c6840 [ 23.268625] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 23.269431] CR2: 0000000020001000 CR3: 00000001c9a23000 CR4: 00000000001406f0 [ 23.270384] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.271335] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.272352] Stack: [ 23.272664] ffff8801ca1e4800 ffff8801c9de0158 ffff8801c84afac0 ffffffff82664e11 [ 23.273794] ffff8801c9de0170 ffffed00393bc02b ffffed00393bc02e ffff8801c9de0168 [ 23.280787] dead4ead00000000 ffff8801c9de0140 0000000000000000 0000000000000000 [ 23.288736] Call Trace: [ 23.291293] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 23.297752] [] sg_finish_rem_req+0x2b5/0x340 [ 23.303775] [] sg_new_read.isra.20+0x39/0x3e0 [ 23.309902] [] ? sg_get_rq_mark+0x142/0x190 [ 23.315844] [] sg_read+0x8bd/0x1440 [ 23.321086] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 23.327721] [] ? lru_cache_add+0xd9/0x1e0 [ 23.333492] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 23.340557] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 23.347196] [] __vfs_read+0x103/0x670 [ 23.352613] [] ? default_llseek+0x290/0x290 [ 23.358549] [] ? fsnotify+0x86/0xf30 [ 23.363876] [] ? fsnotify+0xf30/0xf30 [ 23.369295] [] ? avc_policy_seqno+0x9/0x20 [ 23.375145] [] ? selinux_file_permission+0x82/0x460 [ 23.381774] [] ? security_file_permission+0x89/0x1e0 [ 23.388501] [] ? rw_verify_area+0xe5/0x2b0 [ 23.394348] [] vfs_read+0x11e/0x380 [ 23.399588] [] SyS_read+0xd9/0x1b0 [ 23.404740] [] ? vfs_copy_file_range+0x740/0x740 [ 23.411112] [] ? do_fast_syscall_32+0xcf/0x890 [ 23.417307] [] ? vfs_copy_file_range+0x740/0x740 [ 23.423673] [] do_fast_syscall_32+0x2f7/0x890 [ 23.429780] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 23.436411] [] entry_SYSENTER_compat+0x51/0x60 [ 23.442613] 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 [ 23.468909] RIP [] __free_pages+0x21/0x80 [ 23.474781] RSP [ 23.478692] ---[ end trace 78d8cea2b471a233 ]--- [ 23.483510] Kernel panic - not syncing: Fatal exception [ 23.489172] Dumping ftrace buffer: [ 23.492675] (ftrace buffer empty) [ 23.496350] Kernel Offset: disabled [ 23.499942] Rebooting in 86400 seconds..