last-modified: verify revision argument is a commit-ish

Passing a tree OID to git-last-modified(1) would trigger BUG behavior.

    git last-modified HEAD^{tree}
    BUG: builtin/last-modified.c:456: paths remaining beyond boundary in last-modified

Fix this error by verifying the parsed revision is a commit-ish.

Reported-by: Gusted <gusted@codeberg.org>
Signed-off-by: Toon Claes <toon@iotcl.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Toon Claes 2026-01-16 14:08:40 +01:00 committed by Junio C Hamano
parent be38275cd8
commit 06643fb8a5
2 changed files with 18 additions and 0 deletions

View File

@ -150,6 +150,11 @@ static int populate_paths_from_revs(struct last_modified *lm)
goto out;
}
if (!repo_peel_to_type(lm->rev.repo, obj->path, 0, obj->item, OBJ_COMMIT)) {
ret = error(_("revision argument is not a commit-ish"));
goto out;
}
diff_tree_oid(lm->rev.repo->hash_algo->empty_tree,
&obj->item->oid, "", &diffopt);
diff_flush(&diffopt);

View File

@ -8,6 +8,7 @@ test_expect_success 'setup' '
test_commit 1 file &&
mkdir a &&
test_commit 2 a/file &&
git tag -mA t2 2 &&
mkdir a/b &&
test_commit 3 a/b/file
'
@ -55,6 +56,13 @@ test_expect_success 'last-modified recursive' '
EOF
'
test_expect_success 'last-modified on annotated tag' '
check_last_modified t2 <<-\EOF
2 a
1 file
EOF
'
test_expect_success 'last-modified recursive with show-trees' '
check_last_modified -r -t <<-\EOF
3 a/b
@ -235,4 +243,9 @@ test_expect_success 'last-modified complains about unknown arguments' '
grep "unknown last-modified argument: --foo" err
'
test_expect_success 'last-modified expects commit-ish' '
test_must_fail git last-modified HEAD^{tree} 2>err &&
grep "revision argument is not a commit-ish" err
'
test_done