From 311bfe18ce8563d0b1b571e9dc9eb35b97de3790 Mon Sep 17 00:00:00 2001 From: Jeff King Date: Mon, 10 Jul 2023 17:12:10 -0400 Subject: ref-filter: clear reachable list pointers after freeing In `reach_filter()`, we pop all commits from the reachable lists, leaving them empty. But because we're operating on a list pointer that was passed by value, the original `filter.reachable_from` and `filter.unreachable_from` pointers are left dangling. As is the case with the previous commit, nobody touches either of these fields after calling `reach_filter()`, so leaving them dangling is OK. But this future proofs against dangerous situations. Signed-off-by: Jeff King Signed-off-by: Taylor Blau Signed-off-by: Junio C Hamano --- ref-filter.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) (limited to 'ref-filter.c') diff --git a/ref-filter.c b/ref-filter.c index 4991cd4f7a..048d277cbf 100644 --- a/ref-filter.c +++ b/ref-filter.c @@ -2418,13 +2418,13 @@ void ref_array_clear(struct ref_array *array) #define EXCLUDE_REACHED 0 #define INCLUDE_REACHED 1 static void reach_filter(struct ref_array *array, - struct commit_list *check_reachable, + struct commit_list **check_reachable, int include_reached) { int i, old_nr; struct commit **to_clear; - if (!check_reachable) + if (!*check_reachable) return; CALLOC_ARRAY(to_clear, array->nr); @@ -2434,7 +2434,7 @@ static void reach_filter(struct ref_array *array, } tips_reachable_from_bases(the_repository, - check_reachable, + *check_reachable, to_clear, array->nr, UNINTERESTING); @@ -2455,8 +2455,8 @@ static void reach_filter(struct ref_array *array, clear_commit_marks_many(old_nr, to_clear, ALL_REV_FLAGS); - while (check_reachable) { - struct commit *merge_commit = pop_commit(&check_reachable); + while (*check_reachable) { + struct commit *merge_commit = pop_commit(check_reachable); clear_commit_marks(merge_commit, ALL_REV_FLAGS); } @@ -2553,8 +2553,8 @@ int filter_refs(struct ref_array *array, struct ref_filter *filter, unsigned int clear_contains_cache(&ref_cbdata.no_contains_cache); /* Filters that need revision walking */ - reach_filter(array, filter->reachable_from, INCLUDE_REACHED); - reach_filter(array, filter->unreachable_from, EXCLUDE_REACHED); + reach_filter(array, &filter->reachable_from, INCLUDE_REACHED); + reach_filter(array, &filter->unreachable_from, EXCLUDE_REACHED); save_commit_buffer = save_commit_buffer_orig; return ret; -- cgit v1.2.3