From: Martin Harvey <mharvey@solarflare.com>
Date: Mon, 10 Sep 2018 09:33:15 +0000 (+0100)
Subject: net/sfc/base: check size of memory to read sensors data to
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=252faf84f41e6d726d3ab0f9b7544723756afcca;p=dpdk.git

net/sfc/base: check size of memory to read sensors data to

Size of provided memory should be consistent with specified size.

Fixes: dfb3b1ce15f6 ("net/sfc/base: import monitors access via MCDI")
Cc: stable@dpdk.org

Signed-off-by: Martin Harvey <mharvey@solarflare.com>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
---

diff --git a/drivers/net/sfc/base/mcdi_mon.c b/drivers/net/sfc/base/mcdi_mon.c
index 93e6b1e358..68bbc575dc 100644
--- a/drivers/net/sfc/base/mcdi_mon.c
+++ b/drivers/net/sfc/base/mcdi_mon.c
@@ -194,6 +194,12 @@ efx_mcdi_read_sensors(
 	uint8_t payload[MAX(MC_CMD_READ_SENSORS_EXT_IN_LEN,
 			    MC_CMD_READ_SENSORS_EXT_OUT_LEN)];
 	uint32_t addr_lo, addr_hi;
+	efx_rc_t rc;
+
+	if (EFSYS_MEM_SIZE(esmp) < size) {
+		rc = EINVAL;
+		goto fail1;
+	}
 
 	req.emr_cmd = MC_CMD_READ_SENSORS;
 	req.emr_in_buf = payload;
@@ -211,6 +217,11 @@ efx_mcdi_read_sensors(
 	efx_mcdi_execute(enp, &req);
 
 	return (req.emr_rc);
+
+fail1:
+	EFSYS_PROBE1(fail1, efx_rc_t, rc);
+
+	return (rc);
 }
 
 static	__checkReturn	efx_rc_t