d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Make sure the address is valid before mapping it.

Browse Source 
MFC after:	1 week
This commit is contained in:
Olivier Houchard 2007-02-13 15:35:57 +00:00
parent 3d9e8ab862
commit 4cc9ecf6cb
1 changed files with 13 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
sys/arm/arm/mem.c
View File

@ -92,8 +92,21 @@ memrw(struct cdev *dev, struct uio *uio, int flags)
continue;
}
if (minor(dev) == CDEV_MINOR_MEM) {
int i;
int address_valid = 0;
v = uio->uio_offset;
v &= ~PAGE_MASK;
for (i = 0; dump_avail[i] || dump_avail[i + 1];
i += 2) {
if (v >= dump_avail[i] &&
v < dump_avail[i + 1]) {
address_valid = 1;
break;
}
}
if (!address_valid)
return (EINVAL);
pmap_kenter((vm_offset_t)_tmppt, v);
o = (int)uio->uio_offset & PAGE_MASK;
c = (u_int)(PAGE_SIZE - ((int)iov->iov_base & PAGE_MASK));