[PATCH 5.13 125/800] fuse: reject internal errno
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2021-07-12 08:17:22
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From: Miklos Szeredi <redacted>
commit 49221cf86d18bb66fe95d3338cb33bd4b9880ca5 upstream.
Don't allow userspace to report errors that could be kernel-internal.
Reported-by: Anatoly Trosinenko <redacted>
Fixes: 334f485df85a ("[PATCH] FUSE - device functions")
Cc: <redacted> # v2.6.14
Signed-off-by: Miklos Szeredi <redacted>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/fuse/dev.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c@@ -1867,7 +1867,7 @@ static ssize_t fuse_dev_do_write(struct } err = -EINVAL; - if (oh.error <= -1000 || oh.error > 0) + if (oh.error <= -512 || oh.error > 0) goto copy_finish; spin_lock(&fpq->lock);