From: SZEDER Gábor Date: Mon, 5 Aug 2019 08:02:40 +0000 (+0200) Subject: commit-graph: error out on invalid commit oids in 'write --stdin-commits' X-Git-Url: https://git.lorimer.id.au/gitweb.git/diff_plain/7c5c9b9c57d58273d17dfc3fec3ebdb25077a9de?ds=sidebyside;hp=39d88318569188c0544c3c0f8207f2e1b1829e60 commit-graph: error out on invalid commit oids in 'write --stdin-commits' While 'git commit-graph write --stdin-commits' expects commit object ids as input, it accepts and silently skips over any invalid commit object ids, and still exits with success: # nonsense $ echo not-a-commit-oid | git commit-graph write --stdin-commits $ echo $? 0 # sometimes I forgot that refs are not good... $ echo HEAD | git commit-graph write --stdin-commits $ echo $? 0 # valid tree OID, but not a commit OID $ git rev-parse HEAD^{tree} | git commit-graph write --stdin-commits $ echo $? 0 $ ls -l .git/objects/info/commit-graph ls: cannot access '.git/objects/info/commit-graph': No such file or directory Check that all input records are indeed valid commit object ids and return with error otherwise, the same way '--stdin-packs' handles invalid input; see e103f7276f (commit-graph: return with errors during write, 2019-06-12). Note that it should only return with error when encountering an invalid commit object id coming from standard input. However, '--reachable' uses the same code path to process object ids pointed to by all refs, and that includes tag object ids as well, which should still be skipped over. Therefore add a new flag to 'enum commit_graph_write_flags' and a corresponding field to 'struct write_commit_graph_context', so we can differentiate between those two cases. Signed-off-by: SZEDER Gábor Acked-by: Derrick Stolee Signed-off-by: Junio C Hamano --- diff --git a/builtin/commit-graph.c b/builtin/commit-graph.c index 64eccde314..57863619b7 100644 --- a/builtin/commit-graph.c +++ b/builtin/commit-graph.c @@ -213,8 +213,10 @@ static int graph_write(int argc, const char **argv) if (opts.stdin_packs) pack_indexes = &lines; - if (opts.stdin_commits) + if (opts.stdin_commits) { commit_hex = &lines; + flags |= COMMIT_GRAPH_WRITE_CHECK_OIDS; + } UNLEAK(buf); } diff --git a/commit-graph.c b/commit-graph.c index 04324a4648..821900675b 100644 --- a/commit-graph.c +++ b/commit-graph.c @@ -782,7 +782,8 @@ struct write_commit_graph_context { unsigned append:1, report_progress:1, - split:1; + split:1, + check_oids:1; const struct split_commit_graph_opts *split_opts; }; @@ -1193,8 +1194,8 @@ static int fill_oids_from_packs(struct write_commit_graph_context *ctx, return 0; } -static void fill_oids_from_commit_hex(struct write_commit_graph_context *ctx, - struct string_list *commit_hex) +static int fill_oids_from_commit_hex(struct write_commit_graph_context *ctx, + struct string_list *commit_hex) { uint32_t i; struct strbuf progress_title = STRBUF_INIT; @@ -1215,20 +1216,21 @@ static void fill_oids_from_commit_hex(struct write_commit_graph_context *ctx, struct commit *result; display_progress(ctx->progress, i + 1); - if (commit_hex->items[i].string && - parse_oid_hex(commit_hex->items[i].string, &oid, &end)) - continue; - - result = lookup_commit_reference_gently(ctx->r, &oid, 1); - - if (result) { + if (!parse_oid_hex(commit_hex->items[i].string, &oid, &end) && + (result = lookup_commit_reference_gently(ctx->r, &oid, 1))) { ALLOC_GROW(ctx->oids.list, ctx->oids.nr + 1, ctx->oids.alloc); oidcpy(&ctx->oids.list[ctx->oids.nr], &(result->object.oid)); ctx->oids.nr++; + } else if (ctx->check_oids) { + error(_("invalid commit object id: %s"), + commit_hex->items[i].string); + return -1; } } stop_progress(&ctx->progress); strbuf_release(&progress_title); + + return 0; } static void fill_oids_from_all_packs(struct write_commit_graph_context *ctx) @@ -1775,6 +1777,7 @@ int write_commit_graph(const char *obj_dir, ctx->append = flags & COMMIT_GRAPH_WRITE_APPEND ? 1 : 0; ctx->report_progress = flags & COMMIT_GRAPH_WRITE_PROGRESS ? 1 : 0; ctx->split = flags & COMMIT_GRAPH_WRITE_SPLIT ? 1 : 0; + ctx->check_oids = flags & COMMIT_GRAPH_WRITE_CHECK_OIDS ? 1 : 0; ctx->split_opts = split_opts; if (ctx->split) { @@ -1829,8 +1832,10 @@ int write_commit_graph(const char *obj_dir, goto cleanup; } - if (commit_hex) - fill_oids_from_commit_hex(ctx, commit_hex); + if (commit_hex) { + if ((res = fill_oids_from_commit_hex(ctx, commit_hex))) + goto cleanup; + } if (!pack_indexes && !commit_hex) fill_oids_from_all_packs(ctx); diff --git a/commit-graph.h b/commit-graph.h index ae4db87fb5..486e64e591 100644 --- a/commit-graph.h +++ b/commit-graph.h @@ -74,7 +74,9 @@ int generation_numbers_enabled(struct repository *r); enum commit_graph_write_flags { COMMIT_GRAPH_WRITE_APPEND = (1 << 0), COMMIT_GRAPH_WRITE_PROGRESS = (1 << 1), - COMMIT_GRAPH_WRITE_SPLIT = (1 << 2) + COMMIT_GRAPH_WRITE_SPLIT = (1 << 2), + /* Make sure that each OID in the input is a valid commit OID. */ + COMMIT_GRAPH_WRITE_CHECK_OIDS = (1 << 3) }; struct split_commit_graph_opts { diff --git a/t/t5318-commit-graph.sh b/t/t5318-commit-graph.sh index 4391007f4c..ab3eccf0fa 100755 --- a/t/t5318-commit-graph.sh +++ b/t/t5318-commit-graph.sh @@ -23,7 +23,7 @@ test_expect_success 'write graph with no packs' ' test_path_is_missing info/commit-graph ' -test_expect_success 'close with correct error on bad input' ' +test_expect_success 'exit with correct error on bad input to --stdin-packs' ' cd "$TRASH_DIRECTORY/full" && echo doesnotexist >in && test_expect_code 1 git commit-graph write --stdin-packs stderr && @@ -40,6 +40,15 @@ test_expect_success 'create commits and repack' ' git repack ' +test_expect_success 'exit with correct error on bad input to --stdin-commits' ' + cd "$TRASH_DIRECTORY/full" && + echo HEAD | test_expect_code 1 git commit-graph write --stdin-commits 2>stderr && + test_i18ngrep "invalid commit object id" stderr && + # valid tree OID, but not a commit OID + git rev-parse HEAD^{tree} | test_expect_code 1 git commit-graph write --stdin-commits 2>stderr && + test_i18ngrep "invalid commit object id" stderr +' + graph_git_two_modes() { git -c core.commitGraph=true $1 >output git -c core.commitGraph=false $1 >expect