The unpack_perms_table() can return error which is negative value. Store
the return value to a signed variable. policy->size is unsigned
variable. It shouldn't be used to store the return status.
Fixes: 2d6b2dea7f3c ("apparmor: add the ability for policy to specify a permission table")
Signed-off-by: Muhammad Usama Anjum <usama.anjum@xxxxxxxxxxxxx>
---
security/apparmor/policy_unpack.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/security/apparmor/policy_unpack.c b/security/apparmor/policy_unpack.c
index 45c9dfdc8e0d..09f316943951 100644
--- a/security/apparmor/policy_unpack.c
+++ b/security/apparmor/policy_unpack.c
@@ -734,14 +734,18 @@ static int unpack_pdb(struct aa_ext *e, struct aa_policydb *policy,
{
void *pos = e->pos;
int i, flags, error = -EPROTO;
+ ssize_t size;
- policy->size = unpack_perms_table(e, &policy->perms);
- if (policy->size < 0) {
- error = policy->size;
+ size = unpack_perms_table(e, &policy->perms);
+ if (size < 0) {
+ error = size;
policy->perms = NULL;
*info = "failed to unpack - perms";
goto fail;
- } else if (policy->perms) {
+ }
+ policy->size = size;
+
+ if (policy->perms) {
/* perms table present accept is index */
flags = TO_ACCEPT1_FLAG(YYTD_DATA32);
} else {
--
2.30.2
