[....] Starting enhanced syslogd: rsyslogd[ 12.569802] audit: type=1400 audit(1514674424.228:4): 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 '10.128.15.207' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 35.572184] kasan: CONFIG_KASAN_INLINE enabled [ 35.576917] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 35.584267] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 35.590473] Dumping ftrace buffer: [ 35.593981] (ftrace buffer empty) [ 35.597661] Modules linked in: [ 35.600933] CPU: 1 PID: 3342 Comm: syzkaller805219 Not tainted 4.9.73-gf3f3457 #11 [ 35.608872] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.618205] task: ffff8801caa94800 task.stack: ffff8801c7cd8000 [ 35.624227] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 35.632484] RSP: 0018:ffff8801c7cdfa50 EFLAGS: 00010a07 [ 35.637898] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 35.645150] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 35.652394] RBP: ffff8801c7cdfa60 R08: 0000000000000001 R09: 0000000000000000 [ 35.659642] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 35.666891] R13: 0000000000000020 R14: ffff8801c7a70000 R15: dffffc0000000000 [ 35.674131] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:000000000890e840 [ 35.682322] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 35.688178] CR2: 0000000020b85ff8 CR3: 00000001cc915000 CR4: 00000000001406e0 [ 35.695419] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.702671] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.709915] Stack: [ 35.712030] ffff8801caa94800 ffff8801c7a70158 ffff8801c7cdfac0 ffffffff82664fc1 [ 35.719984] ffff8801c7a70170 ffffed0038f4e02b ffffed0038f4e02e ffff8801c7a70168 [ 35.727940] dead4ead00000000 ffff8801c7a70140 0000000000000000 0000000000000000 [ 35.735899] Call Trace: [ 35.738456] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 35.744914] [] sg_finish_rem_req+0x2b5/0x340 [ 35.750939] [] sg_new_read.isra.20+0x39/0x3e0 [ 35.757048] [] ? sg_get_rq_mark+0x142/0x190 [ 35.762986] [] sg_read+0x8bd/0x1440 [ 35.768227] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 35.775242] [] ? __do_page_fault+0x5ec/0xd40 [ 35.781269] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 35.787930] [] __vfs_read+0x103/0x670 [ 35.793355] [] ? default_llseek+0x290/0x290 [ 35.799304] [] ? fsnotify+0x86/0xf30 [ 35.804646] [] ? fsnotify+0xf30/0xf30 [ 35.810092] [] ? avc_policy_seqno+0x9/0x20 [ 35.815961] [] ? selinux_file_permission+0x82/0x460 [ 35.822592] [] ? security_file_permission+0x89/0x1e0 [ 35.829317] [] ? rw_verify_area+0xe5/0x2b0 [ 35.835167] [] vfs_read+0x11e/0x380 [ 35.840412] [] SyS_read+0xd9/0x1b0 [ 35.845568] [] ? vfs_copy_file_range+0x740/0x740 [ 35.851940] [] ? compat_SyS_ioctl+0x8c/0x2050 [ 35.858049] [] ? do_fast_syscall_32+0xcf/0x890 [ 35.864259] [] ? vfs_copy_file_range+0x740/0x740 [ 35.870639] [] do_fast_syscall_32+0x2f7/0x890 [ 35.876756] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.883387] [] entry_SYSENTER_compat+0x51/0x60 [ 35.889581] 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 [ 35.915901] RIP [] __free_pages+0x21/0x80 [ 35.921787] RSP [ 35.925601] ---[ end trace 3ba035f4c29ec49c ]--- [ 35.930507] Kernel panic - not syncing: Fatal exception [ 35.935907] Dumping ftrace buffer: [ 35.939422] (ftrace buffer empty) [ 35.943186] Kernel Offset: disabled [ 35.946791] Rebooting in 86400 seconds..