| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.10 098/593] fuse: reject internal errno | Date | Mon, 12 Jul 2021 08:04:18 +0200 |
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From: Miklos Szeredi <mszeredi@redhat.com>
commit 49221cf86d18bb66fe95d3338cb33bd4b9880ca5 upstream.
Don't allow userspace to report errors that could be kernel-internal.
Reported-by: Anatoly Trosinenko <anatoly.trosinenko@gmail.com> Fixes: 334f485df85a ("[PATCH] FUSE - device functions") Cc: <stable@vger.kernel.org> # v2.6.14 Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> 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 @@ -1871,7 +1871,7 @@ 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);
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