[....] Starting enhanced syslogd: rsyslogd[ 13.065518] audit: type=1400 audit(1514749560.727:4): avc: denied { syslog } for pid=3172 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 '10.128.15.246' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 26.749629] sg_write: data in/out 29964/54 bytes for SCSI command 0x10-- guessing data in; [ 26.749629] program syzkaller111992 not setting count and/or reply_len properly [ 26.765775] kasan: CONFIG_KASAN_INLINE enabled [ 26.770332] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 26.777845] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 26.784049] Dumping ftrace buffer: [ 26.787560] (ftrace buffer empty) [ 26.791239] Modules linked in: [ 26.794514] CPU: 1 PID: 3329 Comm: syzkaller111992 Not tainted 4.9.73-gf3f3457 #11 [ 26.802185] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.811509] task: ffff8801c9ec1800 task.stack: ffff8801c99d0000 [ 26.817533] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 26.825765] RSP: 0018:ffff8801c99d7a50 EFLAGS: 00010a07 [ 26.831180] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 26.838417] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 26.845669] RBP: ffff8801c99d7a60 R08: 0000000000000001 R09: 0000000000000000 [ 26.852927] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 26.860165] R13: 0000000000000020 R14: ffff8801c8b58000 R15: dffffc0000000000 [ 26.867407] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:000000000832f840 [ 26.875600] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 26.881449] CR2: 0000000020001000 CR3: 00000001c8bbc000 CR4: 00000000001406e0 [ 26.888689] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 26.895927] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 26.903160] Stack: [ 26.905277] ffff8801c9ec1800 ffff8801c8b58158 ffff8801c99d7ac0 ffffffff82664fc1 [ 26.913240] ffff8801c8b58170 ffffed003916b02b ffffed003916b02e ffff8801c8b58168 [ 26.921203] dead4ead00000000 ffff8801c8b58140 0000000000000000 0000000000000000 [ 26.929152] Call Trace: [ 26.931713] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 26.938184] [] sg_finish_rem_req+0x2b5/0x340 [ 26.944208] [] sg_new_read.isra.20+0x39/0x3e0 [ 26.950319] [] ? sg_get_rq_mark+0x142/0x190 [ 26.956256] [] sg_read+0x8bd/0x1440 [ 26.961497] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 26.968136] [] ? lru_cache_add+0xd9/0x1e0 [ 26.973901] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 26.980969] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 26.987604] [] __vfs_read+0x103/0x670 [ 26.993022] [] ? default_llseek+0x290/0x290 [ 26.998964] [] ? fsnotify+0x86/0xf30 [ 27.004295] [] ? fsnotify+0xf30/0xf30 [ 27.009715] [] ? avc_policy_seqno+0x9/0x20 [ 27.015577] [] ? selinux_file_permission+0x82/0x460 [ 27.022208] [] ? security_file_permission+0x89/0x1e0 [ 27.028930] [] ? rw_verify_area+0xe5/0x2b0 [ 27.034781] [] vfs_read+0x11e/0x380 [ 27.040025] [] SyS_read+0xd9/0x1b0 [ 27.045184] [] ? vfs_copy_file_range+0x740/0x740 [ 27.051571] [] ? do_fast_syscall_32+0xcf/0x890 [ 27.057773] [] ? vfs_copy_file_range+0x740/0x740 [ 27.064142] [] do_fast_syscall_32+0x2f7/0x890 [ 27.070253] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.076886] [] entry_SYSENTER_compat+0x51/0x60 [ 27.083082] 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 [ 27.109399] RIP [] __free_pages+0x21/0x80 [ 27.115290] RSP [ 27.119105] ---[ end trace 4600c247ec4faa56 ]--- [ 27.123922] Kernel panic - not syncing: Fatal exception [ 27.129714] Dumping ftrace buffer: [ 27.133222] (ftrace buffer empty) [ 27.136903] Kernel Offset: disabled [ 27.140497] Rebooting in 86400 seconds..