Re: AUDIT: copy_from_user is a deathtrap.

[Alan Cox]

> Oh, read() has to return the right value, but we should _also_ do a
> SIGSEGV, in my opinion (it would also catch all those programs that didn't
> expect it).
> 
> However, that apparently flies in the face of UNIX history and apparently
> some standard (whether it was POSIX or SuS or something else, I can't
> remember, but that discussion came up earlier..)

Unix history I think

Posix doesnt care - indeed it can be that a posix system has no memory
protection or kernel/user divide. SuS seems to simply leave passing bogus
addresses as undefined

Alan