[PATCH] sparse-index: fix uninitialized jump

From: Derrick Stolee via GitGitGadget <gitgitgadget@gmail.com>
Date: May 17, 2021, 12:22 UTC
Message-ID: <pull.953.git.1621254137590.gitgitgadget@gmail.com>

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

-- 
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