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From: Namhyung Kim on 13 Aug 2010 11:00
buf can be a user-space pointer in case of is_user, 3rd arg, is 1.
But casting to ubuf lacks required address_space notations. Add it.

Signed-off-by: Namhyung Kim <namhyung(a)gmail.com>
---
lib/bitmap.c | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/bitmap.c b/lib/bitmap.c
index ffb78c9..42205d8 100644
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -422,7 +422,7 @@ int __bitmap_parse(const char *buf, unsigned int buflen,
{
int c, old_c, totaldigits, ndigits, nchunks, nbits;
u32 chunk;
- const char __user *ubuf = buf;
+ const char __user *ubuf = (const char __user __force *) buf;

bitmap_zero(maskp, nmaskbits);

@@ -507,7 +507,8 @@ int bitmap_parse_user(const char __user *ubuf,
{
if (!access_ok(VERIFY_READ, ubuf, ulen))
return -EFAULT;
- return __bitmap_parse((const char *)ubuf, ulen, 1, maskp, nmaskbits);
+ return __bitmap_parse((const char __force *)ubuf, ulen, 1,
+ maskp, nmaskbits);
}
EXPORT_SYMBOL(bitmap_parse_user);

--
1.7.0.4

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