Messages in this thread |  | | | From | (H. Peter Anvin) | | Subject | Re: copy_from_user() fix | | Date | 25 Aug 1998 06:40:14 GMT |
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Followup to: <199808250429.OAA10383@vindaloo.atnf.CSIRO.AU> By author: Richard Gooch <rgooch@atnf.csiro.au> In newsgroup: linux.dev.kernel > > Jamie Lokier writes: > > On Tue, Aug 25, 1998 at 01:45:12AM +0100, Jamie Lokier wrote: > > > Will I don't agree with the feature either, all we're talking about is > > > adding one line to the page fault handler: send_sig(SIGSEGV). Nothing > > > else needs to change, does it? > > > > I just changed my mind. > > > > I bet no applications at all currently check for EFAULT from system > > calls, unless they're really weird and are doing it to behave _as if_ > > they'd received SIGSEGV. Actually I bet they don't bother because every > > syscall would need to be wrapped. I'm theorising that this could screw > > up Wine in some unusual but valid cases. > > Well, you're wrong. I do have applications that explicitely check for > EFAULT. I *don't* want them to receive SEGV.
So, what happens if the libc/kernel interface is changed? You're screwed, because your code is broken.
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