diff --git a/fs/smb/client/fs_context.c b/fs/smb/client/fs_context.c
index 8b70d92f4845..4c295d6ca986 100644
--- a/fs/smb/client/fs_context.c
+++ b/fs/smb/client/fs_context.c
@@ -1380,12 +1380,14 @@ static int smb3_fs_context_parse_param(struct fs_context *fc,
 			cifs_errorf(fc, "Unknown error parsing devname\n");
 			goto cifs_parse_mount_err;
 		}
+		kfree(ctx->source);
 		ctx->source = smb3_fs_context_fullpath(ctx, '/');
 		if (IS_ERR(ctx->source)) {
 			ctx->source = NULL;
 			cifs_errorf(fc, "OOM when copying UNC string\n");
 			goto cifs_parse_mount_err;
 		}
+		kfree(fc->source);
 		fc->source = kstrdup(ctx->source, GFP_KERNEL);
 		if (fc->source == NULL) {
 			cifs_errorf(fc, "OOM when copying UNC string\n");