From: Jaeyoon Jung <jaeyoon.jung@lge.com>
Date: Mon, 26 Aug 2024 16:41:34 +0000 (+0900)
Subject: makedevs: Fix matching uid/gid
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ca9d193a21e6b8669c4da1a68cd5e0791bb80a4b;p=thirdparty%2Fopenembedded%2Fopenembedded-core-contrib.git

makedevs: Fix matching uid/gid

Correct the length to compare in convert2guid() to fix an issue where it
ends up with returning a wrong id that matches partially. Also fix the
length of usr_buf and grp_buf in interpret_table_entry() which are used
as arguments of convert2guid().

Signed-off-by: Jaeyoon Jung <jaeyoon.jung@lge.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
---

diff --git a/meta/recipes-devtools/makedevs/makedevs/makedevs.c b/meta/recipes-devtools/makedevs/makedevs/makedevs.c
index 2254b548918..411a6691534 100644
--- a/meta/recipes-devtools/makedevs/makedevs/makedevs.c
+++ b/meta/recipes-devtools/makedevs/makedevs/makedevs.c
@@ -202,7 +202,7 @@ static unsigned long convert2guid(char *id_buf, struct name_id *search_list)
 		// Check for bad user/group name
 		node = search_list;
 		while (node != NULL) {
-			if (!strncmp(node->name, id_buf, strlen(id_buf))) {
+			if (!strncmp(node->name, id_buf, MAX_ID_LEN)) {
 				fprintf(stderr, "WARNING: Bad user/group name %s detected\n", id_buf);
 				break;
 			}
@@ -212,7 +212,7 @@ static unsigned long convert2guid(char *id_buf, struct name_id *search_list)
 	} else {
 		node = search_list;
 		while (node != NULL) {
-			if (!strncmp(node->name, id_buf, strlen(id_buf)))
+			if (!strncmp(node->name, id_buf, MAX_ID_LEN))
 				return node->id;
 			node = node->next;
 		}
@@ -362,13 +362,13 @@ static void add_new_fifo(char *name, char *path, unsigned long uid,
 static int interpret_table_entry(char *line)
 {
 	char *name;
-	char usr_buf[MAX_ID_LEN];
-	char grp_buf[MAX_ID_LEN];
-	char path[4096], type;
+	char usr_buf[MAX_ID_LEN+1];
+	char grp_buf[MAX_ID_LEN+1];
+	char path[PATH_MAX], type;
 	unsigned long mode = 0755, uid = 0, gid = 0, major = 0, minor = 0;
 	unsigned long start = 0, increment = 1, count = 0;
 
-	if (0 > sscanf(line, "%4095s %c %lo %39s %39s %lu %lu %lu %lu %lu", path,
+	if (0 > sscanf(line, "%4095s %c %lo %40s %40s %lu %lu %lu %lu %lu", path,
 		    &type, &mode, usr_buf, grp_buf, &major, &minor, &start,
 		    &increment, &count))
 	{