audit: type=1400 audit(1513076994.005:7): avc:  denied  { map } for  pid=3159 comm="syzkaller742631" path="/root/syzkaller742631840" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 3159 Comm: syzkaller742631 Not tainted 4.15.0-rc3-next-20171212+ #65
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:string+0xb4/0x200 lib/vsprintf.c:594
RSP: 0018:ffff8801c48ff8c8 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: fffffffffffffffe RCX: ffffffff8516bc2f
RDX: 000dccad8dce4e8e RSI: 1ffff1003891ff01 RDI: ffff8801c48ff8e8
RBP: ffff8801c48ff918 R08: ffffed00389e8c96 R09: ffffed00389e8c96
R10: 0000000000000002 R11: ffffed00389e8c95 R12: 006e656c6e727474
R13: 006e656c6e727473 R14: ffffffffffffffff R15: ffff8801c4f464aa
FS:  00000000010c0880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000454f50 CR3: 00000001c4ecb000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 vsnprintf+0x863/0x1900 lib/vsprintf.c:2281
 seq_vprintf+0xe3/0x1a0 fs/seq_file.c:397
 seq_printf+0xb3/0xe0 fs/seq_file.c:412
 show_timer+0x1ee/0x2b0 fs/proc/base.c:2303
 seq_read+0x385/0x13d0 fs/seq_file.c:234
 __vfs_read+0xef/0xa00 fs/read_write.c:411
 vfs_read+0x124/0x360 fs/read_write.c:447
 SYSC_read fs/read_write.c:573 [inline]
 SyS_read+0xef/0x220 fs/read_write.c:566
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x440139
RSP: 002b:00007ffe0b5ffc68 EFLAGS: 00000213 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007ffe0b5ffa10 RCX: 0000000000440139
RDX: 0000000000000000 RSI: 0000000020874000 RDI: 0000000000000003
RBP: 000000000000007f R08: 0000000000000011 R09: 65732f636f72702f
R10: 0000000000000000 R11: 0000000000000213 R12: 00007ffe0b5ffc70
R13: 00000000004a1597 R14: 00007ffe0b5ffb88 R15: 0000000000000001
Code: 01 00 00 e8 2f 64 59 fc 4d 85 f6 0f 84 10 01 00 00 e8 21 64 59 fc 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 4d 8d 65 01 48 c1 ea 03 <0f> b6 04 02 4c 89 ea 83 e2 07 38 d0 7f 08 84 c0 0f 85 ec 00 00 
RIP: string+0xb4/0x200 lib/vsprintf.c:594 RSP: ffff8801c48ff8c8
---[ end trace 8d569e97bb27d536 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..