[PATCH 06/21] diff-lib: fix leaking diffopts in `do_diff_cache()`
From: Patrick Steinhardt <hidden>
Date: 2024-10-11 05:32:30
Subsystem:
the rest · Maintainer:
Linus Torvalds
In `do_diff_cache()` we initialize a new `rev_info` and then overwrite its `diffopt` with a user-provided set of options. This can leak memory because `repo_init_revisions()` may end up allocating memory for the `diffopt` itself depending on the configuration. And as that field is overwritten we won't ever free that. Plug the memory leak by releasing the diffopts before we overwrite them. Signed-off-by: Patrick Steinhardt <redacted> --- diff-lib.c | 1 + t/t7610-mergetool.sh | 1 + 2 files changed, 2 insertions(+)
diff --git a/diff-lib.c b/diff-lib.c
index 6b14b959629..3cf353946f5 100644
--- a/diff-lib.c
+++ b/diff-lib.c@@ -661,6 +661,7 @@ int do_diff_cache(const struct object_id *tree_oid, struct diff_options *opt) repo_init_revisions(opt->repo, &revs, NULL); copy_pathspec(&revs.prune_data, &opt->pathspec); + diff_free(&revs.diffopt); revs.diffopt = *opt; revs.diffopt.no_free = 1;
diff --git a/t/t7610-mergetool.sh b/t/t7610-mergetool.sh
index 22b3a85b3e9..5c5e79e9905 100755
--- a/t/t7610-mergetool.sh
+++ b/t/t7610-mergetool.sh@@ -10,6 +10,7 @@ Testing basic merge tool invocation' GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME +TEST_PASSES_SANITIZE_LEAK=true . ./test-lib.sh # All the mergetool test work by checking out a temporary branch based
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2.47.0.dirty