audit: type=1400 audit(1513047726.747:7): avc:  denied  { map } for  pid=3155 comm="syzkaller917602" path="/root/syzkaller917602994" 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: 3155 Comm: syzkaller917602 Not tainted 4.15.0-rc2-mm1+ #39
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:string+0xb4/0x200 lib/vsprintf.c:595
RSP: 0018:ffff8801c44ff780 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: fffffffffffffffe RCX: ffffffff8515819f
RDX: 000dccad8dce4e8e RSI: 1ffff1003889fe01 RDI: ffff8801c44ff7a0
RBP: ffff8801c44ff7d0 R08: ffffed0038957406 R09: ffffed0038957406
R10: 0000000000000002 R11: ffffed0038957405 R12: 006e656c6e727474
R13: 006e656c6e727473 R14: ffffffffffffffff R15: ffff8801c4aba02a
FS:  000000000222f880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000205e2ff0 CR3: 00000001c5125000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 vsnprintf+0x863/0x1900 lib/vsprintf.c:2282
 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
 traverse+0x248/0xa00 fs/seq_file.c:111
 seq_read+0x96a/0x13d0 fs/seq_file.c:189
 do_loop_readv_writev fs/read_write.c:673 [inline]
 do_iter_read+0x3db/0x5b0 fs/read_write.c:897
 vfs_readv+0x121/0x1c0 fs/read_write.c:959
 do_preadv+0x11b/0x1a0 fs/read_write.c:1043
 SYSC_preadv fs/read_write.c:1093 [inline]
 SyS_preadv+0x30/0x40 fs/read_write.c:1088
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x440159
RSP: 002b:00007ffccead57b8 EFLAGS: 00000213 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 00007ffccead57c0 RCX: 0000000000440159
RDX: 0000000000000001 RSI: 00000000205e2ff0 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000011 R09: 65732f636f72702f
R10: 0001000000000000 R11: 0000000000000213 R12: 0000000000401a20
R13: 0000000000401ab0 R14: 0000000000000000 R15: 0000000000000000
Code: 01 00 00 e8 0f b4 5a fc 4d 85 f6 0f 84 10 01 00 00 e8 01 b4 5a 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:595 RSP: ffff8801c44ff780
---[ end trace c05b9ffee56089e7 ]---