[....] Starting enhanced syslogd: rsyslogd[ 9.605027] audit: type=1400 audit(1514714613.170:4): avc: denied { syslog } for pid=3164 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[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.15.215' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 36.729249] sg_write: data in/out 29964/54 bytes for SCSI command 0x10-- guessing data in; [ 36.729249] program syzkaller272628 not setting count and/or reply_len properly [ 36.731566] kasan: CONFIG_KASAN_INLINE enabled [ 36.732175] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 36.733163] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 36.733980] Dumping ftrace buffer: [ 36.734454] (ftrace buffer empty) [ 36.734947] Modules linked in: [ 36.735415] CPU: 0 PID: 3337 Comm: syzkaller272628 Not tainted 4.9.73-gf3f3457 #11 [ 36.736422] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.737650] task: ffff8801cbc73000 task.stack: ffff8801c8488000 [ 36.738455] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 36.739558] RSP: 0018:ffff8801c848fa50 EFLAGS: 00010a07 [ 36.740287] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 36.741261] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 36.742274] RBP: ffff8801c848fa60 R08: 0000000000000001 R09: 0000000000000000 [ 36.743236] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 36.744186] R13: 0000000000000020 R14: ffff8801c328a100 R15: dffffc0000000000 [ 36.745139] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000008170840 [ 36.746222] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 36.746995] CR2: 0000000020001000 CR3: 00000001ccacc000 CR4: 00000000001406f0 [ 36.747945] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.748895] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.753382] Stack: [ 36.755498] ffff8801cbc73000 ffff8801c328a258 ffff8801c848fac0 ffffffff82664fc1 [ 36.763441] ffff8801c328a270 ffffed003865144b ffffed003865144e ffff8801c328a268 [ 36.771387] dead4ead00000000 ffff8801c328a240 0000000000000000 0000000000000000 [ 36.779326] Call Trace: [ 36.781879] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 36.788337] [] sg_finish_rem_req+0x2b5/0x340 [ 36.794361] [] sg_new_read.isra.20+0x39/0x3e0 [ 36.800470] [] ? sg_get_rq_mark+0x142/0x190 [ 36.806408] [] sg_read+0x8bd/0x1440 [ 36.811649] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 36.818281] [] ? lru_cache_add+0xd9/0x1e0 [ 36.824044] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 36.831106] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 36.837735] [] __vfs_read+0x103/0x670 [ 36.843149] [] ? default_llseek+0x290/0x290 [ 36.849084] [] ? fsnotify+0x86/0xf30 [ 36.854410] [] ? fsnotify+0xf30/0xf30 [ 36.859827] [] ? avc_policy_seqno+0x9/0x20 [ 36.865675] [] ? selinux_file_permission+0x82/0x460 [ 36.872304] [] ? security_file_permission+0x89/0x1e0 [ 36.879023] [] ? rw_verify_area+0xe5/0x2b0 [ 36.884872] [] vfs_read+0x11e/0x380 [ 36.890113] [] SyS_read+0xd9/0x1b0 [ 36.895268] [] ? vfs_copy_file_range+0x740/0x740 [ 36.901664] [] ? do_fast_syscall_32+0xcf/0x890 [ 36.907859] [] ? vfs_copy_file_range+0x740/0x740 [ 36.914233] [] do_fast_syscall_32+0x2f7/0x890 [ 36.920341] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.926982] [] entry_SYSENTER_compat+0x51/0x60 [ 36.933178] 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 [ 36.959557] RIP [] __free_pages+0x21/0x80 [ 36.965436] RSP [ 36.969345] ---[ end trace 057e2e57f0e10a8d ]--- [ 36.974072] Kernel panic - not syncing: Fatal exception [ 36.979785] Dumping ftrace buffer: [ 36.983291] (ftrace buffer empty) [ 36.986965] Kernel Offset: disabled [ 36.990557] Rebooting in 86400 seconds..