1 files changed, 2 insertions, 28 deletions

diff --git a/drivers/usb/gadget/function/f_ncm.c b/drivers/usb/gadget/function/f_ncm.c
index b4206b0dede5..1f638759a953 100644
--- a/drivers/usb/gadget/function/f_ncm.c
+++ b/drivers/usb/gadget/function/f_ncm.c
@@ -1189,7 +1189,6 @@ static int ncm_unwrap_ntb(struct gether *port,
 	const struct ndp_parser_opts *opts = ncm->parser_opts;
 	unsigned	crc_len = ncm->is_crc ? sizeof(uint32_t) : 0;
 	int		dgram_counter;
-	bool		ndp_after_header;
 
 	/* dwSignature */
 	if (get_unaligned_le32(tmp) != opts->nth_sign) {
@@ -1216,7 +1215,6 @@ static int ncm_unwrap_ntb(struct gether *port,
 	}
 
 	ndp_index = get_ncm(&tmp, opts->ndp_index);
-	ndp_after_header = false;
 
 	/* Run through all the NDP's in the NTB */
 	do {
@@ -1232,8 +1230,6 @@ static int ncm_unwrap_ntb(struct gether *port,
 			     ndp_index);
 			goto err;
 		}
-		if (ndp_index == opts->nth_size)
-			ndp_after_header = true;
 
 		/*
 		 * walk through NDP
@@ -1312,37 +1308,13 @@ static int ncm_unwrap_ntb(struct gether *port,
 			index2 = get_ncm(&tmp, opts->dgram_item_len);
 			dg_len2 = get_ncm(&tmp, opts->dgram_item_len);
 
-			if (index2 == 0 || dg_len2 == 0)
-				break;
-
 			/* wDatagramIndex[1] */
-			if (ndp_after_header) {
-				if (index2 < opts->nth_size + opts->ndp_size) {
-					INFO(port->func.config->cdev,
-					     "Bad index: %#X\n", index2);
-					goto err;
-				}
-			} else {
-				if (index2 < opts->nth_size + opts->dpe_size) {
-					INFO(port->func.config->cdev,
-					     "Bad index: %#X\n", index2);
-					goto err;
-				}
-			}
 			if (index2 > block_len - opts->dpe_size) {
 				INFO(port->func.config->cdev,
 				     "Bad index: %#X\n", index2);
 				goto err;
 			}
 
-			/* wDatagramLength[1] */
-			if ((dg_len2 < 14 + crc_len) ||
-					(dg_len2 > frame_max)) {
-				INFO(port->func.config->cdev,
-				     "Bad dgram length: %#X\n", dg_len);
-				goto err;
-			}
-
 			/*
 			 * Copy the data into a new skb.
 			 * This ensures the truesize is correct
@@ -1359,6 +1331,8 @@ static int ncm_unwrap_ntb(struct gether *port,
 			ndp_len -= 2 * (opts->dgram_item_len * 2);
 
 			dgram_counter++;
+			if (index2 == 0 || dg_len2 == 0)
+				break;
 		} while (ndp_len > 2 * (opts->dgram_item_len * 2));
 	} while (ndp_index);