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[PATCH 4/8] commit-graph: read `GDAT` chunk with `pair_chunk_expect()`

From
Taylor Blau <me@ttaylorr.com>
Date
Oct 13, 2023, 19:25 UTC
Message-ID
<898b5bdb033518f2022d41b3cb5f03f71cc90070.1697225110.git.me@ttaylorr.com>
In-Reply-To
<cover.1697225110.git.me@ttaylorr.com>

Perform an identical conversion as in previous commits to read the GDAT chunk.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
---
 commit-graph.c | 17 +++++------------
 1 file changed, 5 insertions(+), 12 deletions(-)
diff --git a/commit-graph.c b/commit-graph.c
index 97d4824673..0fab99f5dd 100644
--- a/commit-graph.c
+++ b/commit-graph.c
@@ -330,16 +330,6 @@ static int graph_read_oid_lookup(const unsigned char *chunk_start,
 	return 0;
 }
 
-static int graph_read_generation_data(const unsigned char *chunk_start,
-				      size_t chunk_size, void *data)
-{
-	struct commit_graph *g = data;
-	if (chunk_size != g->num_commits * sizeof(uint32_t))
-		return error("commit-graph generations chunk is wrong size");
-	g->chunk_generation_data = chunk_start;
-	return 0;
-}
-
 static int graph_read_bloom_index(const unsigned char *chunk_start,
 				  size_t chunk_size, void *data)
 {
@@ -457,8 +447,11 @@ struct commit_graph *parse_commit_graph(struct repo_settings *s,
 		   &graph->chunk_base_graphs_size);
 
 	if (s->commit_graph_generation_version >= 2) {
-		read_chunk(cf, GRAPH_CHUNKID_GENERATION_DATA,
-			   graph_read_generation_data, graph);
+		if (pair_chunk_expect(cf, GRAPH_CHUNKID_GENERATION_DATA,
+				      &graph->chunk_generation_data,
+				      st_mult(graph->num_commits,
+					      sizeof(uint32_t))))
+			error(_("commit-graph generations chunk is wrong size"));
 		pair_chunk(cf, GRAPH_CHUNKID_GENERATION_DATA_OVERFLOW,
 			   &graph->chunk_generation_data_overflow,
 			   &graph->chunk_generation_data_overflow_size);
-- 
2.42.0.352.gd9c5062ff7.dirty
Previous: Taylor BlauNext: Taylor Blau
Message 54 of 67 in “bounds-checks for chunk-based files”
  1. 0/20 bounds-checks for chunk-based filesJeff King, Oct 9, 2023
  2. 01/20 chunk-format: note that pair_chunk() is unsafeJeff King, Oct 9, 2023
  3. Taylor BlauOct 10, 2023
  4. Jeff KingOct 11, 2023
  5. 02/20 t: add library for munging chunk-format filesJeff King, Oct 9, 2023
  6. Taylor BlauOct 10, 2023
  7. 03/20 midx: stop ignoring malformed oid fanout chunkJeff King, Oct 9, 2023
  8. Taylor BlauOct 10, 2023
  9. Jeff KingOct 11, 2023
  10. 04/20 commit-graph: check size of oid fanout chunkJeff King, Oct 9, 2023
  11. Taylor BlauOct 11, 2023
  12. Taylor BlauOct 11, 2023
  13. Jeff KingOct 11, 2023
  14. 05/20 midx: check size of oid lookup chunkJeff King, Oct 9, 2023
  15. 06/20 commit-graph: check consistency of fanout tableJeff King, Oct 9, 2023
  16. Taylor BlauOct 11, 2023
  17. 07/20 midx: check size of pack names chunkJeff King, Oct 9, 2023
  18. Taylor BlauOct 11, 2023
  19. Jeff KingOct 11, 2023
  20. 08/20 midx: enforce chunk alignment on readingJeff King, Oct 9, 2023
  21. Taylor BlauOct 11, 2023
  22. Taylor BlauOct 11, 2023
  23. Jeff KingOct 11, 2023
  24. 09/20 midx: check size of object offset chunkJeff King, Oct 9, 2023
  25. Taylor BlauOct 11, 2023
  26. 10/20 midx: bounds-check large offset chunkJeff King, Oct 9, 2023
  27. Taylor BlauOct 11, 2023
  28. Jeff KingOct 11, 2023
  29. 11/20 midx: check size of revindex chunkJeff King, Oct 9, 2023
  30. Taylor BlauOct 11, 2023
  31. 12/20 commit-graph: check size of commit data chunkJeff King, Oct 9, 2023
  32. Taylor BlauOct 11, 2023
  33. Jeff KingOct 11, 2023
  34. 13/20 commit-graph: detect out-of-bounds extra-edges pointersJeff King, Oct 9, 2023
  35. Taylor BlauOct 11, 2023
  36. 14/20 commit-graph: bounds-check base graphs chunkJeff King, Oct 9, 2023
  37. Taylor BlauOct 11, 2023
  38. 15/20 commit-graph: check size of generations chunkJeff King, Oct 9, 2023
  39. 16/20 commit-graph: bounds-check generation overflow chunkJeff King, Oct 9, 2023
  40. 17/20 commit-graph: check bounds when accessing BDAT chunkJeff King, Oct 9, 2023
  41. Taylor BlauOct 11, 2023
  42. Jeff KingOct 11, 2023
  43. 18/20 commit-graph: check bounds when accessing BIDX chunkJeff King, Oct 9, 2023
  44. Taylor BlauOct 11, 2023
  45. 19/20 commit-graph: detect out-of-order BIDX offsetsJeff King, Oct 9, 2023
  46. Taylor BlauOct 11, 2023
  47. 20/20 chunk-format: drop pair_chunk_unsafe()Jeff King, Oct 9, 2023
  48. Taylor BlauOct 11, 2023
  49. Jeff KingOct 11, 2023
  50. 0/8 chunk-format: introduce `pair_chunk_expect()` convenience APITaylor Blau, Oct 13, 2023
  51. 1/8 chunk-format: introduce `pair_chunk_expect()` helperTaylor Blau, Oct 13, 2023
  52. 2/8 commit-graph: read `OIDF` chunk with `pair_chunk_expect()`Taylor Blau, Oct 13, 2023
  53. 3/8 commit-graph: read `CDAT` chunk with `pair_chunk_expect()`Taylor Blau, Oct 13, 2023
  54. 4/8 commit-graph: read `GDAT` chunk with `pair_chunk_expect()`Taylor Blau, Oct 13, 2023
  55. 5/8 commit-graph: read `BIDX` chunk with `pair_chunk_expect()`Taylor Blau, Oct 13, 2023
  56. Taylor BlauOct 13, 2023
  57. Junio C HamanoOct 14, 2023
  58. Jeff KingOct 20, 2023
  59. 6/8 midx: read `OIDF` chunk with `pair_chunk_expect()`Taylor Blau, Oct 13, 2023
  60. Junio C HamanoOct 13, 2023
  61. 7/8 midx: read `OIDL` chunk with `pair_chunk_expect()`Taylor Blau, Oct 13, 2023
  62. 8/8 midx: read `OOFF` chunk with `pair_chunk_expect()`Taylor Blau, Oct 13, 2023
  63. Jeff KingOct 20, 2023
  64. 21/20 t5319: make corrupted large-offset test more robustJeff King, Oct 14, 2023
  65. Junio C HamanoOct 14, 2023
  66. Jeff KingOct 15, 2023
  67. Junio C HamanoOct 15, 2023

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