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-rw-r--r--drivers/atmodem/ussd.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/atmodem/ussd.c b/drivers/atmodem/ussd.c
index 332e07f1..f38dfd04 100644
--- a/drivers/atmodem/ussd.c
+++ b/drivers/atmodem/ussd.c
@@ -72,9 +72,9 @@ static const unsigned char *ucs2_gsm_to_packed(const char *content,
unsigned char *gsm;
long written;
unsigned char *packed;
- unsigned char buf[182 * 4]; /* 182 USSD chars * 2 (UCS2) * 2 (hex) */
+ unsigned char buf[182 * 2]; /* 182 USSD chars * 2 (UCS2) */
- if (strlen(content) > sizeof(buf))
+ if (strlen(content) > sizeof(buf) * 2) /* Hex, 2 chars / byte */
return NULL;
decoded = decode_hex_own_buf(content, -1, &len, 0, buf);