[dpdk-dev] [PATCH 5/5] telemetry: fix buffer overrun if max bytes read

[Ciara Power <ciara.power@intel.com>]

If 1024 bytes were received over the socket, this caused
buffer_recvf[bytes] to overrun the array. The size of the buffer - 1 is
now passed to the read function.

Coverity issue: 358442
Fixes: b80fe1805eee ("telemetry: introduce backward compatibility")
Cc: ciara.power@intel.com

Signed-off-by: Ciara Power <ciara.power@intel.com>
---
 lib/librte_telemetry/telemetry_legacy.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/librte_telemetry/telemetry_legacy.c b/lib/librte_telemetry/telemetry_legacy.c
index 2de9021349..a341fe4ebd 100644
--- a/lib/librte_telemetry/telemetry_legacy.c
+++ b/lib/librte_telemetry/telemetry_legacy.c
@@ -217,7 +217,7 @@ legacy_client_handler(void *sock_id)
 	int ret;
 	char buffer_recv[BUF_SIZE];
 	/* receive data is not null terminated */
-	int bytes = read(s, buffer_recv, sizeof(buffer_recv));
+	int bytes = read(s, buffer_recv, sizeof(buffer_recv) - 1);
 
 	while (bytes > 0) {
 		buffer_recv[bytes] = 0;
@@ -234,7 +234,7 @@ legacy_client_handler(void *sock_id)
 			if (ret < 0)
 				printf("\nCould not send error response\n");
 		}
-		bytes = read(s, buffer_recv, sizeof(buffer_recv));
+		bytes = read(s, buffer_recv, sizeof(buffer_recv) - 1);
 	}
 	close(s);
 	return NULL;
-- 
2.17.1