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stream_blob_to_fd: detect errors reading from stream 

We call read_istream, but never check its return value for
errors. This can lead to us looping infinitely, as we just
keep trying to write "-1" bytes (and we do not notice the
error, as we simply check that write_in_full reports the
same number of bytes we fed it, which of course is also -1).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2013-03-25 16:16:50 -04:00 committed by Junio C Hamano
parent 7632cd2744
commit 45d4bdae59
1 changed files with 2 additions and 0 deletions
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2
streaming.c
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@ -514,6 +514,8 @@ int stream_blob_to_fd(int fd, unsigned const char *sha1, struct stream_filter *f
ssize_t wrote, holeto;
ssize_t readlen = read_istream(st, buf, sizeof(buf));
if (readlen < 0)
goto close_and_exit;
if (!readlen)
break;
if (can_seek && sizeof(buf) == readlen) {