Merge branch 'js/packet-read-line-check-null' into next

Some low level protocol codepath could crash when they get an
unexpected flush packet, which is now fixed.

* js/packet-read-line-check-null:
always check for NULL return from packet_read_line()
correct error messages for NULL packet_read_line()

diff --git a/builtin/archive.c b/builtin/archive.c
index f863465a0fa137f3446071a0ec1653adad536fdc..73971d0dd20e7233d6cb1e6c16986ede25526939 100644 (file)
--- a/builtin/archive.c
+++ b/builtin/archive.c
@@ -55,7 +55,7 @@ static int run_remote_archiver(int argc, const char **argv,
 
        buf = packet_read_line(fd[0], NULL);
        if (!buf)
-               die(_("git archive: expected ACK/NAK, got EOF"));
+               die(_("git archive: expected ACK/NAK, got a flush packet"));
        if (strcmp(buf, "ACK")) {
                if (starts_with(buf, "NACK "))
                        die(_("git archive: NACK %s"), buf + 5);

diff --git a/fetch-pack.c b/fetch-pack.c
index 8253d746e0c40492e05360fe6f27bfa85bb39fbc..d97461296d5692521cd038f9ffa0b5f5c3c3f3dd 100644 (file)
--- a/fetch-pack.c
+++ b/fetch-pack.c
@@ -261,8 +261,8 @@ static enum ack_type get_ack(int fd, struct object_id *result_oid)
        char *line = packet_read_line(fd, &len);
        const char *arg;
 
-       if (!len)
-               die(_("git fetch-pack: expected ACK/NAK, got EOF"));
+       if (!line)
+               die(_("git fetch-pack: expected ACK/NAK, got a flush packet"));
        if (!strcmp(line, "NAK"))
                return NAK;
        if (skip_prefix(line, "ACK ", &arg)) {

diff --git a/remote-curl.c b/remote-curl.c
index 6ec535243565d4b1a50e22868966b4aec33776f8..e11e619d0da8a3b0748ca1af7d58bce07aaf7431 100644 (file)
--- a/remote-curl.c
+++ b/remote-curl.c
@@ -351,6 +351,8 @@ static struct discovery *discover_refs(const char *service, int for_push)
                 * pkt-line matches our request.
                 */
                line = packet_read_line_buf(&last->buf, &last->len, NULL);
+               if (!line)
+                       die("invalid server response; expected service, got flush packet");
 
                strbuf_reset(&exp);
                strbuf_addf(&exp, "# service=%s", service);

diff --git a/send-pack.c b/send-pack.c
index 2112d3b27ad21e1d457b08a3aa71a811b5e8ee79..8d9190f5e7815c6b2f18afd266643a8c862e526e 100644 (file)
--- a/send-pack.c
+++ b/send-pack.c
@@ -137,6 +137,8 @@ static int pack_objects(int fd, struct ref *refs, struct oid_array *extra, struc
 static int receive_unpack_status(int in)
 {
        const char *line = packet_read_line(in, NULL);
+       if (!line)
+               return error(_("unexpected flush packet while reading remote unpack status"));
        if (!skip_prefix(line, "unpack ", &line))
                return error(_("unable to parse remote unpack status: %s"), line);
        if (strcmp(line, "ok"))