[....] Starting enhanced syslogd: rsyslogd[ 11.976698] audit: type=1400 audit(1514492013.222:4): 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 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 '10.128.15.209' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 22.383385] sg_write: data in/out 9964/54 bytes for SCSI command 0x10-- guessing data in; [ 22.383385] program syzkaller087962 not setting count and/or reply_len properly [ 22.399399] kasan: CONFIG_KASAN_INLINE enabled [ 22.403951] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 22.411348] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 22.417549] Dumping ftrace buffer: [ 22.421055] (ftrace buffer empty) [ 22.424735] Modules linked in: [ 22.428007] CPU: 0 PID: 3323 Comm: syzkaller087962 Not tainted 4.9.72-gcb7518e #10 [ 22.435674] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.445005] task: ffff8801c9d7e000 task.stack: ffff8801c86a8000 [ 22.451025] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 22.459251] RSP: 0018:ffff8801c86afa50 EFLAGS: 00010a07 [ 22.464665] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 22.472183] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 22.479421] RBP: ffff8801c86afa60 R08: 0000000000000001 R09: 0000000000000000 [ 22.486697] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 22.493934] R13: 0000000000000020 R14: ffff8801c8590000 R15: dffffc0000000000 [ 22.501180] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:000000000983d840 [ 22.509381] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 22.515233] CR2: 0000000020001000 CR3: 00000001c86ca000 CR4: 00000000001406f0 [ 22.522475] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.529719] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.536956] Stack: [ 22.539078] ffff8801c9d7e000 ffff8801c8590158 ffff8801c86afac0 ffffffff82664fc1 [ 22.547025] ffff8801c8590170 ffffed00390b202b ffffed00390b202e ffff8801c8590168 [ 22.554972] dead4ead00000000 ffff8801c8590140 0000000000000000 0000000000000000 [ 22.562945] Call Trace: [ 22.565506] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 22.571981] [] sg_finish_rem_req+0x2b5/0x340 [ 22.571985] [] sg_new_read.isra.20+0x39/0x3e0 [ 22.571988] [] ? sg_get_rq_mark+0x142/0x190 [ 22.571991] [] sg_read+0x8bd/0x1440 [ 22.571995] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 22.572002] [] ? lru_cache_add+0xd9/0x1e0 [ 22.572008] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 22.572016] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 22.572021] [] __vfs_read+0x103/0x670 [ 22.572025] [] ? default_llseek+0x290/0x290 [ 22.572031] [] ? fsnotify+0x86/0xf30 [ 22.572034] [] ? fsnotify+0xf30/0xf30 [ 22.572040] [] ? avc_policy_seqno+0x9/0x20 [ 22.572045] [] ? selinux_file_permission+0x82/0x460 [ 22.572049] [] ? security_file_permission+0x89/0x1e0 [ 22.572053] [] ? rw_verify_area+0xe5/0x2b0 [ 22.572057] [] vfs_read+0x11e/0x380 [ 22.572060] [] SyS_read+0xd9/0x1b0 [ 22.572064] [] ? vfs_copy_file_range+0x740/0x740 [ 22.572070] [] ? do_fast_syscall_32+0xcf/0x890 [ 22.572077] [] ? vfs_copy_file_range+0x740/0x740 [ 22.572081] [] do_fast_syscall_32+0x2f7/0x890 [ 22.572084] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 22.572090] [] entry_SYSENTER_compat+0x51/0x60 [ 22.572144] 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 [ 22.572149] RIP [] __free_pages+0x21/0x80 [ 22.572150] RSP [ 22.574480] ---[ end trace c7d8ce13f894c200 ]--- [ 22.574484] Kernel panic - not syncing: Fatal exception [ 22.578085] Dumping ftrace buffer: [ 22.578087] (ftrace buffer empty) [ 22.578089] Kernel Offset: disabled [ 22.765891] Rebooting in 86400 seconds..