[....] Starting enhanced syslogd: rsyslogd[ 14.089509] audit: type=1400 audit(1520397104.546:4): avc: denied { syslog } for pid=3572 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 '10.128.0.19' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 27.023682] kasan: CONFIG_KASAN_INLINE enabled [ 27.028292] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 27.035624] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 27.041823] Dumping ftrace buffer: [ 27.045335] (ftrace buffer empty) [ 27.049012] Modules linked in: [ 27.052291] CPU: 0 PID: 3728 Comm: syzkaller372021 Not tainted 4.9.86-gb324a70 #50 [ 27.059961] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.069286] task: ffff8801c5b94800 task.stack: ffff8801d8908000 [ 27.075308] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 27.083554] RSP: 0018:ffff8801d890fa60 EFLAGS: 00010a07 [ 27.088969] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82668edb [ 27.096207] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 27.103446] RBP: ffff8801d890fa70 R08: 0000000000000001 R09: 0000000000000001 [ 27.110684] R10: 0000000000000000 R11: ffff8801c5b94800 R12: 0000000000000004 [ 27.117933] R13: 0000000000000020 R14: ffff8801d97a2100 R15: dffffc0000000000 [ 27.125172] FS: 0000000001f22880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 27.133364] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.139211] CR2: 0000000020000340 CR3: 00000001c4962000 CR4: 0000000000160670 [ 27.146453] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.153690] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.160928] Stack: [ 27.163046] 0000000000000001 ffff8801d97a2258 ffff8801d890fad0 ffffffff82668f01 [ 27.171009] ffff8801d97a2270 ffffed003b2f444b ffffed003b2f444e ffff8801d97a2268 [ 27.178975] dead4ead00000000 ffff8801d97a2240 0000000000000000 0000000000000000 [ 27.186936] Call Trace: [ 27.189494] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 27.195956] [] sg_finish_rem_req+0x2b5/0x340 [ 27.201981] [] sg_new_read.isra.20+0x356/0x3e0 [ 27.208183] [] ? sg_get_rq_mark+0x103/0x190 [ 27.214125] [] sg_read+0x8b7/0x1440 [ 27.219372] [] ? sg_proc_seq_show_debug+0xd90/0xd90 [ 27.226006] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 27.233073] [] ? sg_proc_seq_show_debug+0xd90/0xd90 [ 27.239705] [] __vfs_read+0x103/0x670 [ 27.245123] [] ? default_llseek+0x290/0x290 [ 27.251062] [] ? fsnotify+0x86/0xf30 [ 27.256394] [] ? fsnotify+0xf30/0xf30 [ 27.261813] [] ? avc_policy_seqno+0x9/0x20 [ 27.267664] [] ? selinux_file_permission+0x82/0x460 [ 27.274297] [] ? security_file_permission+0x89/0x1e0 [ 27.281018] [] ? rw_verify_area+0xe5/0x2b0 [ 27.286867] [] vfs_read+0x11e/0x380 [ 27.292110] [] SyS_read+0xd9/0x1b0 [ 27.297266] [] ? vfs_copy_file_range+0x740/0x740 [ 27.303639] [] ? do_syscall_64+0x48/0x490 [ 27.309403] [] ? vfs_copy_file_range+0x740/0x740 [ 27.315774] [] do_syscall_64+0x1a4/0x490 [ 27.321453] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 27.328344] 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 [ 27.354955] RIP [] __free_pages+0x21/0x80 [ 27.360845] RSP [ 27.364850] ---[ end trace f543e367811fdb70 ]--- [ 27.369656] Kernel panic - not syncing: Fatal exception [ 27.375306] Dumping ftrace buffer: [ 27.378820] (ftrace buffer empty) [ 27.382500] Kernel Offset: disabled [ 27.386095] Rebooting in 86400 seconds..