Commit 851c51abdf8272e0d1bfdf3597f7da3ea6450373
2016-03-10T10:40:47
diff_tform: fix potential NULL pointer access When the user passes in a diff which has no repository associated we may call `git_config__get_int_force` with a NULL-pointer configuration. Even though `git_config__get_int_force` is designed to swallow errors, it is not intended to be called with a NULL pointer configuration. Fix the issue by only calling `git_config__get_int_force` only when configuration could be retrieved from the repository.
diff --git a/src/diff_tform.c b/src/diff_tform.c
index 8577f06..6a6a628 100644
--- a/src/diff_tform.c
+++ b/src/diff_tform.c
@@ -261,7 +261,7 @@ static int normalize_find_opts(
if (!given ||
(given->flags & GIT_DIFF_FIND_ALL) == GIT_DIFF_FIND_BY_CONFIG)
{
- if (diff->repo) {
+ if (cfg) {
char *rule =
git_config__get_string_force(cfg, "diff.renames", "true");
int boolval;
@@ -318,8 +318,10 @@ static int normalize_find_opts(
#undef USE_DEFAULT
if (!opts->rename_limit) {
- opts->rename_limit = git_config__get_int_force(
- cfg, "diff.renamelimit", DEFAULT_RENAME_LIMIT);
+ if (cfg) {
+ opts->rename_limit = git_config__get_int_force(
+ cfg, "diff.renamelimit", DEFAULT_RENAME_LIMIT);
+ }
if (opts->rename_limit <= 0)
opts->rename_limit = DEFAULT_RENAME_LIMIT;