[....] Starting enhanced syslogd: rsyslogd[ 10.626948] audit: type=1400 audit(1514679868.713:4): avc: denied { syslog } for pid=3170 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 '10.128.15.198' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 35.598154] kasan: CONFIG_KASAN_INLINE enabled [ 35.598909] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 35.599879] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 35.600701] Dumping ftrace buffer: [ 35.601178] (ftrace buffer empty) [ 35.601674] Modules linked in: [ 35.602140] CPU: 0 PID: 3339 Comm: syzkaller486052 Not tainted 4.9.73-gf3f3457 #11 [ 35.603148] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.604369] task: ffff8801c8d41800 task.stack: ffff8801c8020000 [ 35.605166] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 35.606273] RSP: 0018:ffff8801c8027a50 EFLAGS: 00010a07 [ 35.607025] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 35.607989] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 35.608963] RBP: ffff8801c8027a60 R08: 0000000000000001 R09: 0000000000000000 [ 35.609929] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 35.610881] R13: 0000000000000020 R14: ffff8801caa9a100 R15: dffffc0000000000 [ 35.611850] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000008f99840 [ 35.612923] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 35.613698] CR2: 0000000020001000 CR3: 00000001cc8c4000 CR4: 00000000001406f0 [ 35.614689] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.615640] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.616591] Stack: [ 35.616886] ffff8801c8d41800 ffff8801caa9a258 ffff8801c8027ac0 ffffffff82664fc1 [ 35.618015] ffff8801caa9a270 ffffed003955344b ffffed003955344e ffff8801caa9a268 [ 35.624327] dead4ead00000000 ffff8801caa9a240 0000000000000000 0000000000000000 [ 35.632273] Call Trace: [ 35.634827] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 35.641286] [] sg_finish_rem_req+0x2b5/0x340 [ 35.647309] [] sg_new_read.isra.20+0x39/0x3e0 [ 35.653432] [] ? sg_get_rq_mark+0x142/0x190 [ 35.659369] [] sg_read+0x8bd/0x1440 [ 35.664611] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 35.671242] [] ? lru_cache_add+0xd9/0x1e0 [ 35.677010] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 35.684080] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 35.690714] [] __vfs_read+0x103/0x670 [ 35.696148] [] ? default_llseek+0x290/0x290 [ 35.702087] [] ? fsnotify+0x86/0xf30 [ 35.707420] [] ? fsnotify+0xf30/0xf30 [ 35.712837] [] ? avc_policy_seqno+0x9/0x20 [ 35.718690] [] ? selinux_file_permission+0x82/0x460 [ 35.725322] [] ? security_file_permission+0x89/0x1e0 [ 35.732052] [] ? rw_verify_area+0xe5/0x2b0 [ 35.737901] [] vfs_read+0x11e/0x380 [ 35.743143] [] SyS_read+0xd9/0x1b0 [ 35.748302] [] ? vfs_copy_file_range+0x740/0x740 [ 35.754675] [] ? do_fast_syscall_32+0xcf/0x890 [ 35.760874] [] ? vfs_copy_file_range+0x740/0x740 [ 35.767245] [] do_fast_syscall_32+0x2f7/0x890 [ 35.773357] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.779991] [] entry_SYSENTER_compat+0x51/0x60 [ 35.786191] 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 [ 35.812565] RIP [] __free_pages+0x21/0x80 [ 35.818450] RSP [ 35.822552] ---[ end trace 825b4a136d2685d4 ]--- [ 35.827288] Kernel panic - not syncing: Fatal exception [ 35.832994] Dumping ftrace buffer: [ 35.836503] (ftrace buffer empty) [ 35.840179] Kernel Offset: disabled [ 35.843770] Rebooting in 86400 seconds..