[PATCH 5/5] prepare_repo_settings(): plug leak of config values
- From
Jeff King <peff@peff.net>
- Date
- Sep 8, 2022, 05:02 UTC
- Message-ID
- <Yxl3elDV2kpAfAvU@coredump.intra.peff.net>
- In-Reply-To
- <Yxl1BNQoy6Drf0Oe@coredump.intra.peff.net>
We call repo_config_get_string() for fetch.negotiationAlgorithm, which allocates a copy of the string, but we never free it.
We could add a call to free(), but there's an even simpler solution: we don't need the string to persist beyond a few strcasecmp() calls, so we can instead use the "_tmp" variant which gives us a const pointer to the cached value.
We need to switch the type of "strval" to "const char *" for this to work, which affects a similar call that checks core.untrackedCache. But it's in the same boat! It doesn't actually need the value to persist beyond a maybe_bool() check (though it does remember to correctly free the string afterwards). So we can simplify it at the same time.
Note that this core.untrackedCache check arguably should be using repo_config_get_maybe_bool(), but there are some subtle behavior changes. E.g., it doesn't currently allow a value-less "true". Arguably it should, but let's avoid lumping further changes in what should be a simple leak cleanup.
Signed-off-by: Jeff King <peff@peff.net> --- repo-settings.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/repo-settings.c b/repo-settings.c index 43bc881bfc..e8b58151bc 100644 --- a/repo-settings.c +++ b/repo-settings.c @@ -22,7 +22,7 @@ void prepare_repo_settings(struct repository *r) { int experimental; int value; - char *strval; + const char *strval; int manyfiles; if (!r->gitdir) @@ -77,7 +77,7 @@ void prepare_repo_settings(struct repository *r) if (!repo_config_get_int(r, "index.version", &value)) r->settings.index_version = value; - if (!repo_config_get_string(r, "core.untrackedcache", &strval)) { + if (!repo_config_get_string_tmp(r, "core.untrackedcache", &strval)) { int v = git_parse_maybe_bool(strval); /* @@ -88,10 +88,9 @@ void prepare_repo_settings(struct repository *r) if (v >= 0) r->settings.core_untracked_cache = v ? UNTRACKED_CACHE_WRITE : UNTRACKED_CACHE_REMOVE; - free(strval); } - if (!repo_config_get_string(r, "fetch.negotiationalgorithm", &strval)) { + if (!repo_config_get_string_tmp(r, "fetch.negotiationalgorithm", &strval)) { int fetch_default = r->settings.fetch_negotiation_algorithm; if (!strcasecmp(strval, "skipping")) r->settings.fetch_negotiation_algorithm = FETCH_NEGOTIATION_SKIPPING;
-- 2.37.3.1139.g47294c03c7