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-rw-r--r--src/gsm0480.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/gsm0480.c b/src/gsm0480.c
index 73be8acd..4b1471f1 100644
--- a/src/gsm0480.c
+++ b/src/gsm0480.c
@@ -386,6 +386,12 @@ static int parse_process_uss_req(const uint8_t *uss_req_data, uint16_t length,
int num_chars;
uint8_t dcs;
+
+ /* we need at least that much */
+ if (length < 8)
+ return 0;
+
+
if (uss_req_data[0] == GSM_0480_SEQUENCE_TAG) {
if (uss_req_data[2] == ASN1_OCTET_STRING_TAG) {
dcs = uss_req_data[4];