Refuse to create funny refs in clone-pack, git-fetch and receive-pack.

Using git-check-ref-format, make sure we do not create refs with
funny names when cloning from elsewhere (clone-pack), fast forwarding
local heads (git-fetch), or somebody pushes into us (receive-pack).

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/clone-pack.c b/clone-pack.c
index c102ca8..48bee96 100644 (file)
--- a/clone-pack.c
+++ b/clone-pack.c
@@ -34,6 +34,12 @@ static void write_one_ref(struct ref *ref)
        int fd;
        char *hex;
 
+       if (!strncmp(ref->name, "refs/", 5) &&
+           check_ref_format(ref->name + 5)) {
+               error("refusing to create funny ref '%s' locally", ref->name);
+               return;
+       }
+
        if (safe_create_leading_directories(path))
                die("unable to create leading directory for %s", ref->name);
        fd = open(path, O_CREAT | O_EXCL | O_WRONLY, 0666);

diff --git a/git-parse-remote.sh b/git-parse-remote.sh
index 4d8a572..32f1085 100755 (executable)
--- a/git-parse-remote.sh
+++ b/git-parse-remote.sh
@@ -94,6 +94,12 @@ canon_refs_list_for_fetch () {
                heads/* | tags/* ) local="refs/$local" ;;
                *) local="refs/heads/$local" ;;
                esac
+
+               if local_ref_name=$(expr "$local" : 'refs/\(.*\)')
+               then
+                  git-check-ref-format "$local_ref_name" ||
+                  die "* refusing to create funny ref '$local_ref_name' locally"
+               fi
                echo "${dot_prefix}${force}${remote}:${local}"
                dot_prefix=.
        done

diff --git a/receive-pack.c b/receive-pack.c
index 06857eb..8f157bc 100644 (file)
--- a/receive-pack.c
+++ b/receive-pack.c
@@ -95,6 +95,10 @@ static int update(const char *name,
        char new_hex[60], *old_hex, *lock_name;
        int newfd, namelen, written;
 
+       if (!strncmp(name, "refs/", 5) && check_ref_format(name + 5))
+               return error("refusing to create funny ref '%s' locally",
+                            name);
+
        namelen = strlen(name);
        lock_name = xmalloc(namelen + 10);
        memcpy(lock_name, name, namelen);