[....] Starting enhanced syslogd: rsyslogd[ 12.962717] audit: type=1400 audit(1514988084.498:4): avc: denied { syslog } for pid=3169 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 periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.15.202' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 26.435179] kasan: CONFIG_KASAN_INLINE enabled [ 26.439777] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 26.447147] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 26.453347] Dumping ftrace buffer: [ 26.456855] (ftrace buffer empty) [ 26.460531] Modules linked in: [ 26.463805] CPU: 0 PID: 3326 Comm: syzkaller742004 Not tainted 4.9.74-g9e5dd8e #12 [ 26.471484] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.480818] task: ffff8801ca743000 task.stack: ffff8801c85f8000 [ 26.486840] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 26.495063] RSP: 0018:ffff8801c85ffa50 EFLAGS: 00010a07 [ 26.500477] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff826649fb [ 26.507712] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 26.514948] RBP: ffff8801c85ffa60 R08: 0000000000000001 R09: 0000000000000000 [ 26.522183] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 26.529416] R13: 0000000000000020 R14: ffff8801c1858000 R15: dffffc0000000000 [ 26.536652] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000009b2d840 [ 26.544843] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 26.550689] CR2: 0000000020e6f000 CR3: 00000001c2a52000 CR4: 00000000001606f0 [ 26.557926] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 26.565163] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 26.572396] Stack: [ 26.574511] ffff8801ca743000 ffff8801c1858158 ffff8801c85ffac0 ffffffff82664a21 [ 26.582458] ffff8801c1858170 ffffed003830b02b ffffed003830b02e ffff8801c1858168 [ 26.590422] dead4ead00000000 ffff8801c1858140 0000000000000000 0000000000000000 [ 26.598396] Call Trace: [ 26.600950] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 26.607406] [] sg_finish_rem_req+0x2b5/0x340 [ 26.613427] [] sg_new_read.isra.20+0x39/0x3e0 [ 26.619536] [] ? sg_get_rq_mark+0x142/0x190 [ 26.625472] [] sg_read+0x8bd/0x1440 [ 26.630714] [] ? __lock_is_held+0xa1/0xf0 [ 26.636476] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 26.643106] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 26.649745] [] __vfs_read+0x103/0x670 [ 26.655169] [] ? default_llseek+0x290/0x290 [ 26.661106] [] ? fsnotify+0x86/0xf30 [ 26.666436] [] ? fsnotify+0xf30/0xf30 [ 26.671852] [] ? avc_policy_seqno+0x9/0x20 [ 26.677700] [] ? selinux_file_permission+0x82/0x460 [ 26.684330] [] ? security_file_permission+0x89/0x1e0 [ 26.691047] [] ? rw_verify_area+0xe5/0x2b0 [ 26.696895] [] vfs_read+0x11e/0x380 [ 26.702134] [] SyS_read+0xd9/0x1b0 [ 26.707288] [] ? vfs_copy_file_range+0x740/0x740 [ 26.713659] [] ? do_fast_syscall_32+0xcf/0x890 [ 26.719856] [] ? vfs_copy_file_range+0x740/0x740 [ 26.726224] [] do_fast_syscall_32+0x2f7/0x890 [ 26.732334] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.738967] [] entry_SYSENTER_compat+0x51/0x60 [ 26.745179] 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 [ 26.771438] RIP [] __free_pages+0x21/0x80 [ 26.777314] RSP [ 26.781216] ---[ end trace e69991fa550b302d ]--- [ 26.786050] Kernel panic - not syncing: Fatal exception [ 26.791756] Dumping ftrace buffer: [ 26.795263] (ftrace buffer empty) [ 26.798939] Kernel Offset: disabled [ 26.802530] Rebooting in 86400 seconds..