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由 Al Viro 提交于
* we need to save the starting point for restarts * reject pathologically short buffers outright Spotted-by: NDenys Vlasenko <dvlasenk@redhat.com> Spotted-by: NOleg Nesterov <oleg@redhat.com> Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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