[....] Starting enhanced syslogd: rsyslogd[ 12.927821] audit: type=1400 audit(1514704149.621:4): avc: denied { syslog } for pid=3168 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 '10.128.0.59' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 25.166239] kasan: CONFIG_KASAN_INLINE enabled [ 25.170881] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 25.178211] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 25.184418] Dumping ftrace buffer: [ 25.187921] (ftrace buffer empty) [ 25.191597] Modules linked in: [ 25.194870] CPU: 0 PID: 3325 Comm: syzkaller815339 Not tainted 4.9.73-gf3f3457 #11 [ 25.202539] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.211869] task: ffff8801cd5ae000 task.stack: ffff8801c8ed0000 [ 25.217905] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 25.226143] RSP: 0018:ffff8801c8ed7a50 EFLAGS: 00010a07 [ 25.231556] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 25.238799] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 25.246047] RBP: ffff8801c8ed7a60 R08: 0000000000000001 R09: 0000000000000000 [ 25.253284] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 25.260522] R13: 0000000000000020 R14: ffff8801c9fcc200 R15: dffffc0000000000 [ 25.267760] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000008bf9840 [ 25.275957] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 25.281806] CR2: 0000000020001000 CR3: 00000001cd473000 CR4: 00000000001406f0 [ 25.289047] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.296285] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.303521] Stack: [ 25.305637] ffff8801cd5ae000 ffff8801c9fcc358 ffff8801c8ed7ac0 ffffffff82664fc1 [ 25.313588] ffff8801c9fcc370 ffffed00393f986b ffffed00393f986e ffff8801c9fcc368 [ 25.321548] dead4ead00000000 ffff8801c9fcc340 0000000000000000 0000000000000000 [ 25.329494] Call Trace: [ 25.332053] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 25.338510] [] sg_finish_rem_req+0x2b5/0x340 [ 25.344534] [] sg_new_read.isra.20+0x39/0x3e0 [ 25.350643] [] ? sg_get_rq_mark+0x142/0x190 [ 25.356585] [] sg_read+0x8bd/0x1440 [ 25.361837] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 25.368469] [] ? lru_cache_add+0xd9/0x1e0 [ 25.374235] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 25.381302] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 25.387936] [] __vfs_read+0x103/0x670 [ 25.393348] [] ? default_llseek+0x290/0x290 [ 25.399285] [] ? fsnotify+0x86/0xf30 [ 25.404613] [] ? fsnotify+0xf30/0xf30 [ 25.410056] [] ? avc_policy_seqno+0x9/0x20 [ 25.415915] [] ? selinux_file_permission+0x82/0x460 [ 25.422554] [] ? security_file_permission+0x89/0x1e0 [ 25.429273] [] ? rw_verify_area+0xe5/0x2b0 [ 25.435132] [] vfs_read+0x11e/0x380 [ 25.440375] [] SyS_read+0xd9/0x1b0 [ 25.445529] [] ? vfs_copy_file_range+0x740/0x740 [ 25.451915] [] ? do_fast_syscall_32+0xcf/0x890 [ 25.458112] [] ? vfs_copy_file_range+0x740/0x740 [ 25.464491] [] do_fast_syscall_32+0x2f7/0x890 [ 25.470603] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.477246] [] entry_SYSENTER_compat+0x51/0x60 [ 25.483440] 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 [ 25.509885] RIP [] __free_pages+0x21/0x80 [ 25.515771] RSP [ 25.519759] ---[ end trace bb8323072f626ee9 ]--- [ 25.524704] Kernel panic - not syncing: Fatal exception [ 25.530455] Dumping ftrace buffer: [ 25.533964] (ftrace buffer empty) [ 25.537642] Kernel Offset: disabled [ 25.541243] Rebooting in 86400 seconds..