diff mbox series

[5/5] telemetry: fix buffer overrun if max bytes read

Message ID 20200512152902.70211-6-ciara.power@intel.com (mailing list archive)
State Accepted, archived
Delegated to: Thomas Monjalon
Headers
Series small fixes for telemetry rework. |

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/travis-robot success Travis build: passed
ci/Intel-compilation success Compilation OK

Commit Message

Power, Ciara May 12, 2020, 3:29 p.m. UTC 
  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(-)

Comments

Kevin Laatz May 18, 2020, 2:53 p.m. UTC | #1 
On 12/05/2020 16:29, Ciara Power wrote:
> 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(-)
>
Acked-by: Kevin Laatz <kevin.laatz@intel.com>
diff mbox series

Patch

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;