[PATCH] sparse-index: fix uninitialized jump

From: "Derrick Stolee via GitGitGadget" <gitgitgadget@gmail.com>
To: git@vger.kernel.org
Cc: gitster@pobox.com, Derrick Stolee <derrickstolee@github.com>,
	Derrick Stolee <dstolee@microsoft.com>
Subject: [PATCH] sparse-index: fix uninitialized jump
Date: Mon, 17 May 2021 12:22:17 +0000	[thread overview]
Message-ID: <pull.953.git.1621254137590.gitgitgadget@gmail.com> (raw)

From: Derrick Stolee <dstolee@microsoft.com>

While testing the sparse-index, I verified a test with --valgrind and it
complained about an uninitialized value being used in a jump in the
path_matches_pattern_list() method. The line was this one:

	if (*dtype == DT_UNKNOWN)

In the call stack, the culprit was the initialization of the dtype
variable in convert_to_sparse_rec().

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
---
    Sparse-index: fix uninitialized variable
    
    I noticed this by accident while using --valgrind for a different
    reason. Seems like an easy fix.
    
    Thanks, -Stolee

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-953%2Fderrickstolee%2Fsparse-index%2Funinitialized-v1
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-953/derrickstolee/sparse-index/uninitialized-v1
Pull-Request: https://github.com/gitgitgadget/git/pull/953

 sparse-index.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sparse-index.c b/sparse-index.c
index b0d5dc5f081b..affc4048f279 100644
--- a/sparse-index.c
+++ b/sparse-index.c
@@ -34,7 +34,7 @@ static int convert_to_sparse_rec(struct index_state *istate,
 	int i, can_convert = 1;
 	int start_converted = num_converted;
 	enum pattern_match_result match;
-	int dtype;
+	int dtype = DT_UNKNOWN;
 	struct strbuf child_path = STRBUF_INIT;
 	struct pattern_list *pl = istate->sparse_checkout_patterns;
 

base-commit: bf949ade81106fbda068c1fdb2c6fd1cb1babe7e
-- 
gitgitgadget
