FAILED: patch "[PATCH] fuse: verify write return" failed to apply to 4.9-stable tree

The patch below does not apply to the 4.9-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 8aab336b14c115c6bf1d4baeb9247e41ed9ce6de Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <[email protected]>
Date: Tue, 12 Nov 2019 11:49:04 +0100
Subject: [PATCH] fuse: verify write return

Make sure filesystem is not returning a bogus number of bytes written.

index db48a5cf8620..795d0f24d8b4 100644
@@ -1096,6 +1096,8 @@ static ssize_t fuse_send_write_pages(struct fuse_io_args *ia,
 	ia->write.in.flags = fuse_write_flags(iocb);
 
 	err = fuse_simple_request(fc, &ap->args);
+	if (!err && ia->write.out.size > count)
+		err = -EIO;
 
 	offset = ap->descs[0].offset;
 	count = ia->write.out.size;