[....] Starting enhanced syslogd: rsyslogd[ 10.369158] audit: type=1400 audit(1514704815.194:4): avc: denied { syslog } for pid=3167 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 '10.128.15.200' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 18.683747] kasan: CONFIG_KASAN_INLINE enabled [ 18.684482] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 18.685461] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 18.686295] Dumping ftrace buffer: [ 18.686768] (ftrace buffer empty) [ 18.687261] Modules linked in: [ 18.687727] CPU: 1 PID: 3321 Comm: syzkaller922737 Not tainted 4.9.73-gf3f3457 #11 [ 18.688734] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 18.689952] task: ffff8801cbfb8000 task.stack: ffff8801c9330000 [ 18.690748] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 18.691854] RSP: 0018:ffff8801c9337a50 EFLAGS: 00010a07 [ 18.692573] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 18.693523] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 18.694473] RBP: ffff8801c9337a60 R08: 0000000000000001 R09: 0000000000000000 [ 18.695450] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 18.696400] R13: 0000000000000020 R14: ffff8801c8a78000 R15: dffffc0000000000 [ 18.697351] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:0000000009036840 [ 18.698440] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 18.699212] CR2: 0000000020001000 CR3: 00000001ccd5a000 CR4: 00000000001406e0 [ 18.700164] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 18.701116] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 18.702082] Stack: [ 18.702378] ffff8801cbfb8000 ffff8801c8a78158 ffff8801c9337ac0 ffffffff82664fc1 [ 18.703506] ffff8801c8a78170 ffffed003914f02b ffffed003914f02e ffff8801c8a78168 [ 18.709197] dead4ead00000000 ffff8801c8a78140 0000000000000000 0000000000000000 [ 18.717138] Call Trace: [ 18.719689] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 18.726146] [] sg_finish_rem_req+0x2b5/0x340 [ 18.732170] [] sg_new_read.isra.20+0x39/0x3e0 [ 18.738279] [] ? sg_get_rq_mark+0x142/0x190 [ 18.744214] [] sg_read+0x8bd/0x1440 [ 18.749457] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 18.756089] [] ? lru_cache_add+0xd9/0x1e0 [ 18.761853] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 18.768914] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 18.775546] [] __vfs_read+0x103/0x670 [ 18.780967] [] ? default_llseek+0x290/0x290 [ 18.786902] [] ? fsnotify+0x86/0xf30 [ 18.792228] [] ? fsnotify+0xf30/0xf30 [ 18.797643] [] ? avc_policy_seqno+0x9/0x20 [ 18.803500] [] ? selinux_file_permission+0x82/0x460 [ 18.810132] [] ? security_file_permission+0x89/0x1e0 [ 18.816847] [] ? rw_verify_area+0xe5/0x2b0 [ 18.822695] [] vfs_read+0x11e/0x380 [ 18.827934] [] SyS_read+0xd9/0x1b0 [ 18.833088] [] ? vfs_copy_file_range+0x740/0x740 [ 18.839457] [] ? do_fast_syscall_32+0xcf/0x890 [ 18.845652] [] ? vfs_copy_file_range+0x740/0x740 [ 18.852019] [] do_fast_syscall_32+0x2f7/0x890 [ 18.858183] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 18.864815] [] entry_SYSENTER_compat+0x51/0x60 [ 18.871007] 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 [ 18.897290] RIP [] __free_pages+0x21/0x80 [ 18.903164] RSP [ 18.907052] ---[ end trace a9be0443234874ec ]--- [ 18.911875] Kernel panic - not syncing: Fatal exception [ 18.917579] Dumping ftrace buffer: [ 18.921086] (ftrace buffer empty) [ 18.924764] Kernel Offset: disabled [ 18.928355] Rebooting in 86400 seconds..