[dpdk-dev] [PATCH 16/37] net/sfc/base: check size of memory to read sensors data to

[Andrew Rybchenko]

From: Martin Harvey <mharvey at solarflare.com>

Size of provided memory should be consistent with specified size.

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

Signed-off-by: Martin Harvey <mharvey at solarflare.com>
Signed-off-by: Andrew Rybchenko <arybchenko at solarflare.com>
---
 drivers/net/sfc/base/mcdi_mon.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/net/sfc/base/mcdi_mon.c b/drivers/net/sfc/base/mcdi_mon.c
index 93e6b1e35..68bbc575d 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
-- 
2.17.1