[PATCH 28/28] http-push: clean up local_refs at exit
- From
Jeff King <peff@peff.net>
- Date
- Sep 24, 2024, 22:12 UTC
- Message-ID
- <20240924221239.GB1143820@coredump.intra.peff.net>
- In-Reply-To
- <20240924214930.GA1143523@coredump.intra.peff.net>
We allocate a list of ref structs from get_local_heads() but never clean it up. We should do so before exiting to avoid complaints from the leak-checker. Note that we have to initialize it to NULL, because there's one code path that can jump to the cleanup label before we assign to it.
Fixing this lets us mark t5540 as leak-free.
Curiously building with SANITIZE=leak and gcc does not seem to find this problem, but switching to clang does. It seems like a fairly obvious leak, though.
I was curious that the matching remote_refs did not have the same leak. But that is because we store the list in a global variable, so it's still reachable after we exit. Arguably we could treat it the same as future-proofing, but I didn't bother (now that the script is marked leak-free, anybody moving it to a stack variable will notice).
Signed-off-by: Jeff King <peff@peff.net> --- http-push.c | 3 ++- t/t5540-http-push-webdav.sh | 1 + 2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/http-push.c b/http-push.c index b36b1f9e35..aad89f2eab 100644 --- a/http-push.c +++ b/http-push.c @@ -1719,7 +1719,7 @@ int cmd_main(int argc, const char **argv) int rc = 0; int i; int new_refs; - struct ref *ref, *local_refs; + struct ref *ref, *local_refs = NULL; CALLOC_ARRAY(repo, 1); @@ -1997,6 +1997,7 @@ int cmd_main(int argc, const char **argv) } refspec_clear(&rs); + free_refs(local_refs); return rc; } diff --git a/t/t5540-http-push-webdav.sh b/t/t5540-http-push-webdav.sh index 37db3dec0c..27389b0908 100755 --- a/t/t5540-http-push-webdav.sh +++ b/t/t5540-http-push-webdav.sh @@ -10,6 +10,7 @@ This test runs various sanity checks on http-push.' GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME +TEST_PASSES_SANITIZE_LEAK=true . ./test-lib.sh if git http-push > /dev/null 2>&1 || [ $? -eq 128 ]
-- 2.46.2.1011.gf1f9323e02