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[PATCH] revision: fix missing null for freed memory

From
Emily M Klassen <forivall@gmail.com>
Date
Feb 8, 2025, 06:17 UTC
Message-ID
<20250208061702.88469-1-forivall@gmail.com>

"git log --graph --no-graph" missed cleaning up the output_prefix and output_prefix_data pointers. This resulted in a segfault when using "--patch", "--name-status" or "--name-only", as the output_prefix_data continued to be in use after free()

Signed-off-by: Emily M Klassen <forivall@gmail.com>
---
I previously reported this a few hours ago, and ended up digging in and figuring
it out. I'll make sure to bottom reply in the follow ups to this patch.
 revision.c | 2 ++
 1 file changed, 2 insertions(+)
diff --git a/revision.c b/revision.c
index 474fa1e767..84cb028e11 100644
--- a/revision.c
+++ b/revision.c
@@ -2615,6 +2615,8 @@ static int handle_revision_opt(struct rev_info *revs, int argc, const char **arg
 		graph_clear(revs->graph);
 		revs->graph = graph_init(revs);
 	} else if (!strcmp(arg, "--no-graph")) {
+		revs->diffopt.output_prefix = NULL;
+		revs->diffopt.output_prefix_data = NULL;
 		graph_clear(revs->graph);
 		revs->graph = NULL;
 	} else if (!strcmp(arg, "--encode-email-headers")) {
-- 
2.48.1
Next: Junio C Hamano
Message 1 of 12 in “revision: fix missing null for freed memory”
  1. revision: fix missing null for freed memoryEmily M Klassen, Feb 8, 2025
  2. Junio C HamanoFeb 8, 2025
  3. Junio C HamanoFeb 10, 2025
  4. Emily KlassenFeb 10, 2025
  5. Junio C HamanoFeb 13, 2025
  6. Patrick SteinhardtFeb 11, 2025
  7. D. Ben KnobleFeb 11, 2025
  8. D. Ben KnobleFeb 11, 2025
  9. Jeff KingFeb 11, 2025
  10. Junio C HamanoFeb 11, 2025
  11. Patrick SteinhardtFeb 12, 2025
  12. Ben KnobleFeb 13, 2025

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