[PATCH v4 7/8] fast-import: forbid escaped NUL in paths
- From
Thalia Archibald <thalia@archibald.dev>
- Date
- Apr 12, 2024, 08:03 UTC
- Message-ID
- <5b464f4b014760d0d9ca3413dacaa7e48f22291f.1712907684.git.thalia@archibald.dev>
- In-Reply-To
- <cover.1712907684.git.thalia@archibald.dev>
NUL cannot appear in paths. Even disregarding filesystem path limitations, the tree object format delimits with NUL, so such a path cannot be encoded by Git.
When a quoted path is unquoted, it could possibly contain NUL from "\000". Forbid it so it isn't truncated.
fast-import still has other issues with NUL, but those will be addressed later.
Signed-off-by: Thalia Archibald <thalia@archibald.dev> --- Documentation/git-fast-import.txt | 1 + builtin/fast-import.c | 2 ++ t/t9300-fast-import.sh | 1 + 3 files changed, 4 insertions(+)
diff --git a/Documentation/git-fast-import.txt b/Documentation/git-fast-import.txt index c6082c3b49..8b6dde45f1 100644 --- a/Documentation/git-fast-import.txt +++ b/Documentation/git-fast-import.txt @@ -661,6 +661,7 @@ and its value must be in canonical form. That is it must not: The root of the tree can be represented by an empty string as `<path>`. +`<path>` cannot contain NUL, either literally or escaped as `\000`. It is recommended that `<path>` always be encoded using UTF-8. `filedelete` diff --git a/builtin/fast-import.c b/builtin/fast-import.c index 7a398dc975..98096b6fa7 100644 --- a/builtin/fast-import.c +++ b/builtin/fast-import.c @@ -2269,6 +2269,8 @@ static void parse_path(struct strbuf *sb, const char *p, const char **endp, if (*p == '"') { if (unquote_c_style(sb, p, endp)) die("Invalid %s: %s", field, command_buf.buf); + if (strlen(sb->buf) != sb->len) + die("NUL in %s: %s", field, command_buf.buf); } else { if (include_spaces) *endp = p + strlen(p); diff --git a/t/t9300-fast-import.sh b/t/t9300-fast-import.sh index 5cde8f8d01..1e68426852 100755 --- a/t/t9300-fast-import.sh +++ b/t/t9300-fast-import.sh @@ -3300,6 +3300,7 @@ test_path_base_fail () { local change="$1" prefix="$2" field="$3" suffix="$4" test_path_fail "$change" 'unclosed " in '"$field" "$prefix" '"hello.c' "$suffix" "Invalid $field" test_path_fail "$change" "invalid escape in quoted $field" "$prefix" '"hello\xff"' "$suffix" "Invalid $field" + test_path_fail "$change" "escaped NUL in quoted $field" "$prefix" '"hello\000"' "$suffix" "NUL in $field" } test_path_eol_quoted_fail () { local change="$1" prefix="$2" field="$3"
-- 2.44.0