[....] Starting enhanced syslogd: rsyslogd[ 10.261586] audit: type=1400 audit(1514752175.688:4): 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 '10.128.0.9' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 18.918451] kasan: CONFIG_KASAN_INLINE enabled [ 18.919186] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 18.920154] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 18.920986] Dumping ftrace buffer: [ 18.921461] (ftrace buffer empty) [ 18.921957] Modules linked in: [ 18.922423] CPU: 1 PID: 3323 Comm: syzkaller052625 Not tainted 4.9.73-gf3f3457 #11 [ 18.923453] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 18.924687] task: ffff8801c9428000 task.stack: ffff8801c80e0000 [ 18.925532] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 18.926682] RSP: 0018:ffff8801c80e7a50 EFLAGS: 00010a07 [ 18.927399] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 18.928370] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 18.929352] RBP: ffff8801c80e7a60 R08: 0000000000000001 R09: 0000000000000000 [ 18.930304] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 18.931297] R13: 0000000000000020 R14: ffff8801c19e4200 R15: dffffc0000000000 [ 18.932300] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000089ee840 [ 18.933374] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 18.934148] CR2: 0000000020001000 CR3: 00000001cd5d3000 CR4: 00000000001406e0 [ 18.935112] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 18.936062] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 18.937023] Stack: [ 18.937351] ffff8801c9428000 ffff8801c19e4358 ffff8801c80e7ac0 ffffffff82664fc1 [ 18.938494] ffff8801c19e4370 ffffed003833c86b ffffed003833c86e ffff8801c19e4368 [ 18.946333] dead4ead00000000 ffff8801c19e4340 0000000000000000 0000000000000000 [ 18.954278] Call Trace: [ 18.956833] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 18.963288] [] sg_finish_rem_req+0x2b5/0x340 [ 18.969309] [] sg_new_read.isra.20+0x39/0x3e0 [ 18.975419] [] ? sg_get_rq_mark+0x142/0x190 [ 18.981354] [] sg_read+0x8bd/0x1440 [ 18.986594] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 18.993234] [] ? lru_cache_add+0xd9/0x1e0 [ 18.998996] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 19.006059] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 19.012690] [] __vfs_read+0x103/0x670 [ 19.018120] [] ? default_llseek+0x290/0x290 [ 19.024064] [] ? fsnotify+0x86/0xf30 [ 19.029397] [] ? fsnotify+0xf30/0xf30 [ 19.034815] [] ? avc_policy_seqno+0x9/0x20 [ 19.040668] [] ? selinux_file_permission+0x82/0x460 [ 19.047302] [] ? security_file_permission+0x89/0x1e0 [ 19.054021] [] ? rw_verify_area+0xe5/0x2b0 [ 19.059869] [] vfs_read+0x11e/0x380 [ 19.065113] [] SyS_read+0xd9/0x1b0 [ 19.070266] [] ? vfs_copy_file_range+0x740/0x740 [ 19.076634] [] ? do_fast_syscall_32+0xcf/0x890 [ 19.082829] [] ? vfs_copy_file_range+0x740/0x740 [ 19.089198] [] do_fast_syscall_32+0x2f7/0x890 [ 19.095307] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 19.101939] [] entry_SYSENTER_compat+0x51/0x60 [ 19.108131] 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 [ 19.134461] RIP [] __free_pages+0x21/0x80 [ 19.140338] RSP [ 19.144639] ---[ end trace be74b1ec99f21b2b ]--- [ 19.149493] Kernel panic - not syncing: Fatal exception [ 19.155253] Dumping ftrace buffer: [ 19.158759] (ftrace buffer empty) [ 19.162433] Kernel Offset: disabled [ 19.166023] Rebooting in 86400 seconds..