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checkout: fix leak of non-existent branch names

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We unconditionally write a branch name into a newly allocated buffer in
new_branch_info->path, via setup_branch_path(). We then check to see if
the branch exists; if not, we set that field to NULL, leaking the
memory. We should take care to free() it when doing so.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2020-08-14 12:14:53 -04:00 committed by Junio C Hamano
parent 9101c8ea2d
commit c514c62a4f
1 changed files with 3 additions and 1 deletions
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4
builtin/checkout.c
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@ -1126,8 +1126,10 @@ static void setup_new_branch_info_and_source_tree(
if (!check_refname_format(new_branch_info->path, 0) &&
!read_ref(new_branch_info->path, &branch_rev))
oidcpy(rev, &branch_rev);
else
else {
free((char *)new_branch_info->path);
new_branch_info->path = NULL; /* not an existing branch */
}
new_branch_info->commit = lookup_commit_reference_gently(the_repository, rev, 1);
if (!new_branch_info->commit) {