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* [PATCH] diff-lib: plug minor memory leaks in do_diff_cache()
@ 2020-11-14 18:37 René Scharfe
  2020-11-17  0:35 ` Jeff King
  0 siblings, 1 reply; 2+ messages in thread
From: René Scharfe @ 2020-11-14 18:37 UTC (permalink / raw)
  To: Git Mailing List; +Cc: Junio C Hamano

do_diff_cache() builds a struct rev_info to hand to diff_cache() from
scratch by initializing it using repo_init_revisions() and then
replacing its diffopt and prune_data members.

The diffopt member is initialized to a heap-allocated list of options,
though.  Release it using diff_setup_done() before overwriting it.

The initial value of the prune_data member doesn't need to be released,
but the copy created using copy_pathspec() does.  Clear it after use.

Signed-off-by: René Scharfe <>
 diff-lib.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/diff-lib.c b/diff-lib.c
index 082e249fc3..b73cc1859a 100644
--- a/diff-lib.c
+++ b/diff-lib.c
@@ -606,10 +606,12 @@ 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_setup_done(&revs.diffopt);
 	revs.diffopt = *opt;

 	if (diff_cache(&revs, tree_oid, NULL, 1))
+	clear_pathspec(&revs.prune_data);
 	return 0;


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2020-11-14 18:37 [PATCH] diff-lib: plug minor memory leaks in do_diff_cache() René Scharfe
2020-11-17  0:35 ` Jeff King

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