From: Gerhard Sittig <redacted>
Date: Thu, 8 Feb 2018 21:44:16 +0000 (+0100)
Subject: chronovu-la: avoid NULL pointer dereference
X-Git-Url: https://sigrok.org/gitweb/?p=libsigrok.git;a=commitdiff_plain;h=755eb221565ae83d8e80e97615b84e2fff4580dd

chronovu-la: avoid NULL pointer dereference

Check pointers' validity before dereferencing them.

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

diff --git a/src/hardware/chronovu-la/api.c b/src/hardware/chronovu-la/api.c
index 3d19b4f0..8ca68edb 100644
--- a/src/hardware/chronovu-la/api.c
+++ b/src/hardware/chronovu-la/api.c
@@ -351,12 +351,12 @@ static int config_list(uint32_t key, GVariant **data,
 		*data = std_gvar_samplerates(ARRAY_AND_SIZE(devc->samplerates));
 		break;
 	case SR_CONF_LIMIT_SAMPLES:
-		if (!devc->prof)
+		if (!devc || !devc->prof)
 			return SR_ERR_BUG;
 		*data = std_gvar_tuple_u64(0, (devc->prof->model == CHRONOVU_LA8) ? MAX_NUM_SAMPLES : MAX_NUM_SAMPLES / 2);
 		break;
 	case SR_CONF_TRIGGER_MATCH:
-		if (!devc->prof)
+		if (!devc || !devc->prof)
 			return SR_ERR_BUG;
 		*data = std_gvar_array_i32(trigger_matches, devc->prof->num_trigger_matches);
 		break;