From 9bf9eed093561f50091014faa7164c0325ea9ced Mon Sep 17 00:00:00 2001 From: Jeff King Date: Mon, 19 Jan 2026 00:22:08 -0500 Subject: remote: fix leak in branch_get_push_1() with invalid "simple" config Most of the code paths in branch_get_push_1() allocate a string for the @{push} value. We then return the result, which is stored in a "struct branch", so the value is not leaked. But there's one path that does leak: when we are in the "simple" push mode, we have to check that the @{push} value matches what we'd get for @{upstream}. If it doesn't, we return an error, but forget to free the @{push} value we computed. Curiously, the existing tests don't trigger this with LSan, even though they do exercise the code path. As far as I can tell, it should be triggered via: git -c push.default=simple \ -c branch.foo.remote=origin \ -c branch.foo.merge=refs/heads/not-foo \ rev-parse foo@{push} which will complain that the upstream ("not-foo") does not match the push destination ("foo"). We do die() shortly after this, but not until after returning from branch_get_push_1(), which is where the leak happens. So it seems like a false negative in LSan. However, I can trigger it reliably by printing the @{push} value using for-each-ref. This takes a little more setup (because we need "foo" to actually exist to iterate over it with for-each-ref), but we can piggy-back on the existing repo config in t6300. Signed-off-by: Jeff King Signed-off-by: Junio C Hamano --- t/for-each-ref-tests.sh | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 't') diff --git a/t/for-each-ref-tests.sh b/t/for-each-ref-tests.sh index e3ad19298a..02fb92e99e 100644 --- a/t/for-each-ref-tests.sh +++ b/t/for-each-ref-tests.sh @@ -1744,6 +1744,15 @@ test_expect_success ':remotename and :remoteref' ' ) ' +test_expect_success '%(push) with an invalid push-simple config' ' + echo "refs/heads/main " >expect && + git -c push.default=simple \ + -c remote.pushdefault=myfork \ + for-each-ref \ + --format="%(refname) %(push)" refs/heads/main >actual && + test_cmp expect actual +' + test_expect_success "${git_for_each_ref} --ignore-case ignores case" ' ${git_for_each_ref} --format="%(refname)" refs/heads/MAIN >actual && test_must_be_empty actual && -- cgit v1.3