do_splice_to(): cap the size before passing to ->splice_read()
pipe capacity won't exceed 2G anyway. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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@ -1143,6 +1143,9 @@ static long do_splice_to(struct file *in, loff_t *ppos,
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if (unlikely(ret < 0))
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return ret;
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if (unlikely(len > MAX_RW_COUNT))
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len = MAX_RW_COUNT;
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if (in->f_op->splice_read)
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splice_read = in->f_op->splice_read;
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else
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