From: Gerhard Sittig <redacted>
Date: Thu, 8 Feb 2018 22:11:59 +0000 (+0100)
Subject: dreamsourcelab-dslogic: avoid NULL pointer dereference
X-Git-Url: https://sigrok.org/gitaction?a=commitdiff_plain;h=8e2fd23acb61f8f7471e40ef7439568022485d25;p=libsigrok.git

dreamsourcelab-dslogic: avoid NULL pointer dereference

Check pointers' validity before dereferencing them.

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

diff --git a/src/hardware/dreamsourcelab-dslogic/api.c b/src/hardware/dreamsourcelab-dslogic/api.c
index 66c81037..021d7023 100644
--- a/src/hardware/dreamsourcelab-dslogic/api.c
+++ b/src/hardware/dreamsourcelab-dslogic/api.c
@@ -514,12 +514,16 @@ 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_THRESHOLD:
+		if (!devc || !devc->profile)
+			return SR_ERR_ARG;
 		if (!strcmp(devc->profile->model, "DSLogic"))
 			*data = std_gvar_thresholds(ARRAY_AND_SIZE(thresholds));
 		else
 			*data = std_gvar_min_max_step_thresholds(0.0, 5.0, 0.1);
 		break;
 	case SR_CONF_SAMPLERATE:
+		if (!devc)
+			return SR_ERR_ARG;
 		*data = std_gvar_samplerates(devc->samplerates, devc->num_samplerates);
 		break;
 	case SR_CONF_TRIGGER_MATCH: