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

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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()
This commit is contained in:
Junio C Hamano 2018-02-27 10:33:54 -08:00
commit 2fb346c06a
4 changed files with 7 additions and 3 deletions
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2
builtin/archive.c
View File

@ -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);

4
fetch-pack.c
View File

@ -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)) {

2
remote-curl.c
View File

@ -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);

2
send-pack.c
View File

@ -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"))