From ddce54b6a95ed5ee3011b4771fda69c2d8a6d538 Mon Sep 17 00:00:00 2001 From: Alex Ng Date: Sun, 6 Aug 2017 13:12:56 -0700 Subject: [PATCH] Drivers: hv: kvp: Use MAX_ADAPTER_ID_SIZE for translating adapter id There's a bug which passes the output buffer size as MAX_IP_ADDR_SIZE, when converting the adapter_id field to UTF16. This is much larger than the actual size (MAX_ADAPTER_ID_SIZE). Fix this by passing the proper size. Fortunately, the translation is limited by the length of the input. This explains why we haven't seen output buffer overflow conditions. Signed-off-by: Alex Ng Signed-off-by: K. Y. Srinivasan Signed-off-by: Greg Kroah-Hartman --- drivers/hv/hv_kvp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/hv/hv_kvp.c b/drivers/hv/hv_kvp.c index 9a90b915b5be..5eed1e7da15c 100644 --- a/drivers/hv/hv_kvp.c +++ b/drivers/hv/hv_kvp.c @@ -304,7 +304,7 @@ static int process_ob_ipinfo(void *in_msg, void *out_msg, int op) strlen((char *)in->body.kvp_ip_val.adapter_id), UTF16_HOST_ENDIAN, (wchar_t *)out->kvp_ip_val.adapter_id, - MAX_IP_ADDR_SIZE); + MAX_ADAPTER_ID_SIZE); if (len < 0) return len;