kh@linuxfoundation.org>

diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c
index 52571916acd4..1815b1e0c607 100644
--- a/drivers/misc/fastrpc.c
+++ b/drivers/misc/fastrpc.c
@@ -367,11 +367,16 @@ static int fastrpc_map_lookup(struct fastrpc_user *fl, int fd,
 {
 	struct fastrpc_session_ctx *sess = fl->sctx;
 	struct fastrpc_map *map = NULL;
+	struct dma_buf *buf;
 	int ret = -ENOENT;
 
+	buf = dma_buf_get(fd);
+	if (IS_ERR(buf))
+		return PTR_ERR(buf);
+
 	spin_lock(&fl->lock);
 	list_for_each_entry(map, &fl->maps, node) {
-		if (map->fd != fd)
+		if (map->fd != fd || map->buf != buf)
 			continue;
 
 		if (take_ref) {FAILED: patch "[PATCH] misc: fastrpc: Fix fastrpc_map_lookup operation" failed to apply to 5.10-stable tree<gregkh@linuxfoundation.org> undefinedquic_lxu5@quicinc.com,dmitry.baryshkov@oss.qualcomm.com,ekansh.gupta@oss.qualcomm.com,gregkh@linuxfoundation.org,srini@kernel.org undefined undefined undefined undefined undefined–BƒŽ"