[PATCH] receive-pack: reject invalid refnames

[Martin Koegler <mkoegler@auto.tuwien.ac.at>]

Signed-off-by: Martin Koegler <mkoegler@auto.tuwien.ac.at>
---
 receive-pack.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/receive-pack.c b/receive-pack.c
index d0a563d..a038a40 100644
--- a/receive-pack.c
+++ b/receive-pack.c
@@ -165,7 +165,9 @@ static const char *update(struct command *cmd)
 	unsigned char *new_sha1 = cmd->new_sha1;
 	struct ref_lock *lock;
 
-	if (!prefixcmp(name, "refs/") && check_ref_format(name + 5)) {
+	/* only HEAD and refs/... are allowed */
+	if (strcmp(name, "HEAD") && 
+	    (prefixcmp(name, "refs/") || check_ref_format(name + 5))) {
 		error("refusing to create funny ref '%s' remotely", name);
 		return "funny refname";
 	}
@@ -177,7 +179,8 @@ static const char *update(struct command *cmd)
 	}
 	if (deny_non_fast_forwards && !is_null_sha1(new_sha1) &&
 	    !is_null_sha1(old_sha1) &&
-	    !prefixcmp(name, "refs/heads/")) {
+	    (!prefixcmp(name, "refs/heads/") ||
+	     !strcmp(name, "HEAD"))) {
 		struct object *old_object, *new_object;
 		struct commit *old_commit, *new_commit;
 		struct commit_list *bases, *ent;
-- 
1.4.4.4