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commit-graph.c: prevent overflow in `load_oid_from_graph()` 

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>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
maint
Taylor Blau 2023-07-12 19:38:00 -04:00 committed by Junio C Hamano
parent 209250ef38
commit 0bd8f30a0e
1 changed files with 1 additions and 1 deletions
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commit-graph.c
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@ -754,7 +754,7 @@ 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,