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fuse: reject internal errno
commit49221cf86d
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>
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@ -1889,7 +1889,7 @@ static ssize_t fuse_dev_do_write(struct fuse_dev *fud,
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}
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err = -EINVAL;
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if (oh.error <= -1000 || oh.error > 0)
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if (oh.error <= -512 || oh.error > 0)
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goto err_finish;
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spin_lock(&fpq->lock);
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