From: Taylor Blau <me@ttaylorr.com>
To: git@vger.kernel.org
Cc: Derrick Stolee <derrickstolee@github.com>,
Jeff King <peff@peff.net>,
Johannes Schindelin <Johannes.Schindelin@gmx.de>,
Junio C Hamano <gitster@pobox.com>,
Victoria Dye <vdye@github.com>
Subject: [PATCH 13/20] commit-graph.c: prevent overflow in `load_oid_from_graph()`
Date: Wed, 12 Jul 2023 19:38:00 -0400 [thread overview]
Message-ID: <0b7aabc23b10c1c3e260848dd8ac500ee7e62d8c.1689205042.git.me@ttaylorr.com> (raw)
In-Reply-To: <cover.1689205042.git.me@ttaylorr.com>
In a similar spirit as previous commits, ensure that we don't overflow
when trying to compute an offset into the `chunk_oid_lookup` table when
the `lex_index` of the item we're trying to look up exceeds
`2^32-1/g->hash_len`.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
---
commit-graph.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/commit-graph.c b/commit-graph.c
index 99af73e40a..1b70bdb07e 100644
--- a/commit-graph.c
+++ b/commit-graph.c
@@ -753,7 +753,7 @@ static void load_oid_from_graph(struct commit_graph *g,
lex_index = pos - g->num_commits_in_base;
- oidread(oid, g->chunk_oid_lookup + g->hash_len * lex_index);
+ oidread(oid, g->chunk_oid_lookup + st_mult(g->hash_len, lex_index));
}
static struct commit_list **insert_parent_or_die(struct repository *r,
--
2.41.0.347.g7b976b8871f
next prev parent reply other threads:[~2023-07-12 23:38 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-12 23:37 [PATCH 00/20] guard object lookups against 32-bit overflow Taylor Blau
2023-07-12 23:37 ` [PATCH 01/20] packfile.c: prevent overflow in `nth_packed_object_id()` Taylor Blau
2023-07-12 23:37 ` [PATCH 02/20] packfile.c: prevent overflow in `load_idx()` Taylor Blau
2023-07-13 8:21 ` Phillip Wood
2023-07-13 14:24 ` Taylor Blau
2023-07-14 0:54 ` Taylor Blau
2023-07-14 9:56 ` Phillip Wood
2023-07-14 16:29 ` Junio C Hamano
2023-07-14 9:55 ` Phillip Wood
2023-07-13 16:14 ` Junio C Hamano
2023-07-12 23:37 ` [PATCH 03/20] packfile.c: use checked arithmetic in `nth_packed_object_offset()` Taylor Blau
2023-07-12 23:37 ` [PATCH 04/20] midx.c: use `size_t`'s for fanout nr and alloc Taylor Blau
2023-07-12 23:37 ` [PATCH 05/20] midx.c: prevent overflow in `nth_midxed_object_oid()` Taylor Blau
2023-07-12 23:37 ` [PATCH 06/20] midx.c: prevent overflow in `nth_midxed_offset()` Taylor Blau
2023-07-12 23:37 ` [PATCH 07/20] midx.c: store `nr`, `alloc` variables as `size_t`'s Taylor Blau
2023-07-12 23:37 ` [PATCH 08/20] midx.c: prevent overflow in `write_midx_internal()` Taylor Blau
2023-07-12 23:37 ` [PATCH 09/20] midx.c: prevent overflow in `fill_included_packs_batch()` Taylor Blau
2023-07-12 23:37 ` [PATCH 10/20] pack-bitmap.c: ensure that eindex lookups don't overflow Taylor Blau
2023-07-12 23:37 ` [PATCH 11/20] commit-graph.c: prevent overflow in `write_commit_graph_file()` Taylor Blau
2023-07-12 23:37 ` [PATCH 12/20] commit-graph.c: prevent overflow in add_graph_to_chain() Taylor Blau
2023-07-12 23:38 ` Taylor Blau [this message]
2023-07-12 23:38 ` [PATCH 14/20] commit-graph.c: prevent overflow in `fill_commit_graph_info()` Taylor Blau
2023-07-12 23:38 ` [PATCH 15/20] commit-graph.c: prevent overflow in `fill_commit_in_graph()` Taylor Blau
2023-07-12 23:38 ` [PATCH 16/20] commit-graph.c: prevent overflow in `load_tree_for_commit()` Taylor Blau
2023-07-12 23:38 ` [PATCH 17/20] commit-graph.c: prevent overflow in `split_graph_merge_strategy()` Taylor Blau
2023-07-12 23:38 ` [PATCH 18/20] commit-graph.c: prevent overflow in `merge_commit_graph()` Taylor Blau
2023-07-12 23:38 ` [PATCH 19/20] commit-graph.c: prevent overflow in `write_commit_graph()` Taylor Blau
2023-07-12 23:38 ` [PATCH 20/20] commit-graph.c: prevent overflow in `verify_commit_graph()` Taylor Blau
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