Don't smash stack when $GIT_ALTERNATE_OBJECT_DIRECTORIES is too long

[git.git] / config.c

diff --git a/config.c b/config.c
index 70d105567921fe75518d8d5fe3d3df4aad0659cd..7b655fdb78350bf9a8320075bef6cf4f1e87c50c 100644 (file)
--- a/config.c
+++ b/config.c
@@ -451,6 +451,9 @@ static int matches(const char* key, const char* value)
 
 static int store_aux(const char* key, const char* value)
 {
+       const char *ep;
+       size_t section_len;
+
        switch (store.state) {
        case KEY_SEEN:
                if (matches(key, value)) {
@@ -468,12 +471,29 @@ static int store_aux(const char* key, const char* value)
                }
                break;
        case SECTION_SEEN:
-               if (strncmp(key, store.key, store.baselen+1)) {
+               /*
+                * What we are looking for is in store.key (both
+                * section and var), and its section part is baselen
+                * long.  We found key (again, both section and var).
+                * We would want to know if this key is in the same
+                * section as what we are looking for.  We already
+                * know we are in the same section as what should
+                * hold store.key.
+                */
+               ep = strrchr(key, '.');
+               section_len = ep - key;
+
+               if ((section_len != store.baselen) ||
+                   memcmp(key, store.key, section_len+1)) {
                        store.state = SECTION_END_SEEN;
                        break;
-               } else
-                       /* do not increment matches: this is no match */
-                       store.offset[store.seen] = ftell(config_file);
+               }
+
+               /*
+                * Do not increment matches: this is no match, but we
+                * just made sure we are in the desired section.
+                */
+               store.offset[store.seen] = ftell(config_file);
                /* fallthru */
        case SECTION_END_SEEN:
        case START: