FAILED: patch "[PATCH] fuse: reject internal errno" failed to apply to 4.19-stable tree

The patch below does not apply to the 4.19-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 49221cf86d18bb66fe95d3338cb33bd4b9880ca5 Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <[email protected]>
Date: Tue, 22 Jun 2021 09:15:35 +0200
Subject: [PATCH] fuse: reject internal errno

Don't allow userspace to report errors that could be kernel-internal.

Reported-by Anatoly Trosinenko <[email protected]>

Fixes 334f485df85a ("[PATCH] FUSE - device functions")

Cc <[email protected]> # v2.6.14

Signed-off-by Miklos Szeredi <[email protected]>

fs/fuse/dev.c +1 -1

index 6e63bcba2a40..b8d58aa08206 100644
@@ -1867,7 +1867,7 @@ static ssize_t fuse_dev_do_write(struct fuse_dev *fud,
        }
 
        err = -EINVAL;
-       if (oh.error <= -1000 || oh.error > 0)
+       if (oh.error <= -512 || oh.error > 0)
                goto copy_finish;
 
        spin_lock(&fpq->lock);

Hi Greg,

Please apply with --fuzz=3 (though I don't really see why this is needed, since there's just a single line of difference in the context).

Should work for backports to all previous versions.