On Mon, May 17, 2021 at 10:57:24PM -0500, Eric W. Biederman wrote: > We open ourselves up to bugs whenever we lie to the type system. > > Skimming through the code it looks like it should be possible > to not need the in_compat_syscall and the casts to the wrong > type by changing the order of the code a little bit. What kind of bug do you expect? We must only copy from user addresses once anyway. I've never seen bugs due the use of in_compat_syscall, but plenty due to cruft code trying to avoid it.
