On Mon, Dec 28, 2009 at 11:00:58PM +0800, liu weni wrote:
>If the acl pointer is NULL or have some error, the acl is invalid.
>The Macro of FOREACH_ACL_ENTRY will make some error.
>
>---
>Signed-off-by: Liuwenyi <qingshenlwy@xxxxxxxxx>
>Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>
>Cc: linux-fsdevel@xxxxxxxxxxxxxxx
>Cc: linux-kernel@xxxxxxxxxxxxxxx
>
>---
>diff --git a/fs/posix_acl.c b/fs/posix_acl.c
>index 39df95a..45f8afa 100644
>--- a/fs/posix_acl.c
>+++ b/fs/posix_acl.c
>@@ -76,6 +76,12 @@ posix_acl_valid(const struct posix_acl *acl)
> unsigned int id = 0; /* keep gcc happy */
> int needs_mask = 0;
>
>+ if (!acl)
>+ return -EINVAL;
>+
>+ if (IS_ERR)
Did you even do a compile test?
I don't think this line will work...
>+ return PTR_ERR(acl);
>+
> FOREACH_ACL_ENTRY(pa, acl, pe) {
> if (pa->e_perm & ~(ACL_READ|ACL_WRITE|ACL_EXECUTE))
> return -EINVAL;
>--
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