From: Greg KH on
2.6.34-stable review patch. If anyone has any objections, please let me know.


From: Heiko Carstens <heiko.carstens(a)>

commit 7cbe17701a0379c7b05a79a6df4f24e41d2afde8 upstream.

A call to access_ok is missing a compat_ptr conversion. Introduced with
b83733639a494d5f42fa00a2506563fbd2d3015d "compat: factor out
compat_rw_copy_check_uvector from compat_do_readv_writev"

fs/compat.c: In function 'compat_rw_copy_check_uvector':
fs/compat.c:629: warning: passing argument 1 of '__access_ok' makes pointer from integer without a cast

Signed-off-by: Heiko Carstens <heiko.carstens(a)>
Reviewed-by: Jeff Moyer <jmoyer(a)>
Signed-off-by: Andrew Morton <akpm(a)>
Signed-off-by: Linus Torvalds <torvalds(a)>
Signed-off-by: Greg Kroah-Hartman <gregkh(a)>

fs/compat.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/compat.c
+++ b/fs/compat.c
@@ -626,7 +626,7 @@ ssize_t compat_rw_copy_check_uvector(int
tot_len += len;
if (tot_len < tmp) /* maths overflow on the compat_ssize_t */
goto out;
- if (!access_ok(vrfy_dir(type), buf, len)) {
+ if (!access_ok(vrfy_dir(type), compat_ptr(buf), len)) {
ret = -EFAULT;
goto out;

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo(a)
More majordomo info at
Please read the FAQ at