From: Gerhard Sittig <redacted>
Date: Fri, 9 Feb 2018 18:08:11 +0000 (+0100)
Subject: korad-kaxxxxp: fix potential NULL dereference
X-Git-Url: https://sigrok.org/gitaction?a=commitdiff_plain;h=fc69eecca07782580d391a385d62321bbfcb038d;p=libsigrok.git

korad-kaxxxxp: fix potential NULL dereference

Check pointers' validity before dereferencing them.

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

diff --git a/src/hardware/korad-kaxxxxp/api.c b/src/hardware/korad-kaxxxxp/api.c
index 96aa03e6..d33373e2 100644
--- a/src/hardware/korad-kaxxxxp/api.c
+++ b/src/hardware/korad-kaxxxxp/api.c
@@ -281,9 +281,13 @@ static int config_list(uint32_t key, GVariant **data,
 	case SR_CONF_DEVICE_OPTIONS:
 		return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
 	case SR_CONF_VOLTAGE_TARGET:
+		if (!devc || !devc->model)
+			return SR_ERR_ARG;
 		*data = std_gvar_min_max_step_array(devc->model->voltage);
 		break;
 	case SR_CONF_CURRENT_LIMIT:
+		if (!devc || !devc->model)
+			return SR_ERR_ARG;
 		*data = std_gvar_min_max_step_array(devc->model->current);
 		break;
 	default: