On 32 bit systems num_aces * sizeof(struct cifs_ace *) could overflow leading to a smaller ppace buffer than we expected.
Signed-off-by: Dan Carpenter <[email protected]> diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c index 72ddf23..c1b2544 100644 --- a/fs/cifs/cifsacl.c +++ b/fs/cifs/cifsacl.c @@ -909,6 +909,8 @@ static void parse_dacl(struct cifs_acl *pdacl, char *end_of_acl, umode_t group_mask = S_IRWXG; umode_t other_mask = S_IRWXU | S_IRWXG | S_IRWXO; + if (num_aces > ULONG_MAX / sizeof(struct cifs_ace *)) + return; ppace = kmalloc(num_aces * sizeof(struct cifs_ace *), GFP_KERNEL); if (!ppace) { -- To unsubscribe from this list: send the line "unsubscribe linux-cifs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
