diff options
| -rw-r--r-- | commit-graph.c | 13 | ||||
| -rwxr-xr-x | t/t5318-commit-graph.sh | 26 |
2 files changed, 37 insertions, 2 deletions
diff --git a/commit-graph.c b/commit-graph.c index a689a55b79..9b3b01da61 100644 --- a/commit-graph.c +++ b/commit-graph.c @@ -305,6 +305,16 @@ static int verify_commit_graph_lite(struct commit_graph *g) return 0; } +static int graph_read_oid_fanout(const unsigned char *chunk_start, + size_t chunk_size, void *data) +{ + struct commit_graph *g = data; + if (chunk_size != 256 * sizeof(uint32_t)) + return error("commit-graph oid fanout chunk is wrong size"); + g->chunk_oid_fanout = (const uint32_t *)chunk_start; + return 0; +} + static int graph_read_oid_lookup(const unsigned char *chunk_start, size_t chunk_size, void *data) { @@ -394,8 +404,7 @@ struct commit_graph *parse_commit_graph(struct repo_settings *s, GRAPH_HEADER_SIZE, graph->num_chunks)) goto free_and_return; - pair_chunk_unsafe(cf, GRAPH_CHUNKID_OIDFANOUT, - (const unsigned char **)&graph->chunk_oid_fanout); + read_chunk(cf, GRAPH_CHUNKID_OIDFANOUT, graph_read_oid_fanout, graph); read_chunk(cf, GRAPH_CHUNKID_OIDLOOKUP, graph_read_oid_lookup, graph); pair_chunk_unsafe(cf, GRAPH_CHUNKID_DATA, &graph->chunk_commit_data); pair_chunk_unsafe(cf, GRAPH_CHUNKID_EXTRAEDGES, &graph->chunk_extra_edges); diff --git a/t/t5318-commit-graph.sh b/t/t5318-commit-graph.sh index ba65f17dd9..d25bea3ec5 100755 --- a/t/t5318-commit-graph.sh +++ b/t/t5318-commit-graph.sh @@ -2,6 +2,7 @@ test_description='commit graph' . ./test-lib.sh +. "$TEST_DIRECTORY"/lib-chunk.sh GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS=0 @@ -821,4 +822,29 @@ test_expect_success 'overflow during generation version upgrade' ' ) ' +corrupt_chunk () { + graph=full/.git/objects/info/commit-graph && + test_when_finished "rm -rf $graph" && + git -C full commit-graph write --reachable && + corrupt_chunk_file $graph "$@" +} + +check_corrupt_chunk () { + corrupt_chunk "$@" && + git -C full -c core.commitGraph=false log >expect.out && + git -C full -c core.commitGraph=true log >out 2>err && + test_cmp expect.out out +} + +test_expect_success 'reader notices too-small oid fanout chunk' ' + # make it big enough that the graph file is plausible, + # otherwise we hit an earlier check + check_corrupt_chunk OIDF clear $(printf "000000%02x" $(test_seq 250)) && + cat >expect.err <<-\EOF && + error: commit-graph oid fanout chunk is wrong size + error: commit-graph is missing the OID Fanout chunk + EOF + test_cmp expect.err err +' + test_done |