diff mbox series

libsepol: add check for category value before printing

Message ID 20231113232014.48621-1-luhuaxin1@huawei.com (mailing list archive)
State Superseded
Delegated to: Petr Lautrbach
Headers show
Series libsepol: add check for category value before printing | expand

Commit Message

Huaxin Lu Nov. 13, 2023, 11:20 p.m. UTC 
From: Huaxin Lu <luhuaxin1@huawei.com>

In mls_semantic_level_expand(), there is a explicitly determine
whether category is 0, which may cause an potential integer
overflow in error branch.

Signed-off-by: Huaxin Lu <luhuaxin1@huawei.com>
---
 libsepol/src/expand.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/libsepol/src/expand.c b/libsepol/src/expand.c
index ee5f9185..9ed22bfd 100644
--- a/libsepol/src/expand.c
+++ b/libsepol/src/expand.c
@@ -945,8 +945,8 @@  int mls_semantic_level_expand(mls_semantic_level_t * sl, mls_level_t * l,
 	for (cat = sl->cat; cat; cat = cat->next) {
 		if (!cat->low || cat->low > cat->high) {
 			ERR(h, "Category range is not valid %s.%s",
-			    p->p_cat_val_to_name[cat->low - 1],
-			    p->p_cat_val_to_name[cat->high - 1]);
+			    cat->low > 0 ? p->p_cat_val_to_name[cat->low - 1] : "n/a",
+			    cat->high > 0 ? p->p_cat_val_to_name[cat->high - 1] : "n/a");
 			return -1;
 		}
 		for (i = cat->low - 1; i < cat->high; i++) {