From: Gerhard Sittig <redacted>
Date: Fri, 9 Feb 2018 18:15:51 +0000 (+0100)
Subject: maynuo-m97: fix potential NULL dereference
X-Git-Url: https://sigrok.org/gitweb/?a=commitdiff_plain;ds=sidebyside;h=fe535a89c9b8dfceeb7706c71af5aad7f6dcda26;p=libsigrok.git

maynuo-m97: fix potential NULL dereference

Check pointers' validity before dereferencing them.

This was reported by clang's scan-build.
---

diff --git a/src/hardware/maynuo-m97/api.c b/src/hardware/maynuo-m97/api.c
index ebc0ddab..0e593938 100644
--- a/src/hardware/maynuo-m97/api.c
+++ b/src/hardware/maynuo-m97/api.c
@@ -363,9 +363,13 @@ static int config_list(uint32_t key, GVariant **data,
 			*data = std_gvar_array_u32(ARRAY_AND_SIZE(devopts_cg));
 			break;
 		case SR_CONF_VOLTAGE_TARGET:
+			if (!devc || !devc->model)
+				return SR_ERR_ARG;
 			*data = std_gvar_min_max_step(0.0, devc->model->max_voltage, 0.001);
 			break;
 		case SR_CONF_CURRENT_LIMIT:
+			if (!devc || !devc->model)
+				return SR_ERR_ARG;
 			*data = std_gvar_min_max_step(0.0, devc->model->max_current, 0.0001);
 			break;
 		default: