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fuse: reject internal errno

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commit 49221cf86d18bb66fe95d3338cb33bd4b9880ca5 upstream.

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

Reported-by: Anatoly Trosinenko <anatoly.trosinenko@gmail.com>
Fixes: 334f485df8 ("[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>
This commit is contained in:
Miklos Szeredi 2021-06-22 09:15:35 +02:00 committed by Greg Kroah-Hartman
parent bb7ee90ea5
commit 4eab2e2e98
1 changed files with 1 additions and 1 deletions
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2
fs/fuse/dev.c
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@ -1871,7 +1871,7 @@ 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);