[PATCH] Replaced read with xread in transport-helper.c to fix SSIZE_MAX overun in t5509

From: Randall S. Becker <rsbecker@nexbridge.com>
Date: Jan 11, 2018, 05:40 UTC
Message-ID: <010f01d38a9e$a5c4f290$f14ed7b0$@nexbridge.com>

This fix was needed on HPE NonStop NSE where SSIZE_MAX is less than BUFFERSIZE resulting in EINVAL. The call to read in transport-helper.c was the only place outside of wrapper.c.

Signed-off-by: Randall S. Becker <rsbecker@nexbridge.com>
---
 transport-helper.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/transport-helper.c b/transport-helper.c
index 3640804..68a4e30 100644
--- a/transport-helper.c
+++ b/transport-helper.c
@@ -1202,7 +1202,7 @@ static int udt_do_read(struct unidirectional_transfer *t)
                return 0;       /* No space for more. */

        transfer_debug("%s is readable", t->src_name);
-       bytes = read(t->src, t->buf + t->bufuse, BUFFERSIZE - t->bufuse);
+       bytes = xread(t->src, t->buf + t->bufuse, BUFFERSIZE - t->bufuse);
        if (bytes < 0 && errno != EWOULDBLOCK && errno != EAGAIN &&
                errno != EINTR) {
                error_errno("read(%s) failed", t->src_name);
--
2.8.5.23.g6fa7ec3