"Michael Kerrisk (man-pages)" <mtk.manpages@xxxxxxxxx> writes: > Hi Oleg, > > On 06/22/2016 11:51 PM, Oleg Nesterov wrote: >> On 06/21, Eric W. Biederman wrote: >>> >>> Adding Oleg just because he seems to do most of the ptrace related >>> maintenance these days. >> >> so I have to admit that I never even tried to actually understand >> ptrace_may_access ;) >> >>> We certainly need something that gives a high level view so people >>> reading the man page can know what to expect. If you get down into the >>> weeds we run the danger of people beginning to think they can depend >>> upon bugs in the implementation. >> >> Personally I agree. I think "man ptrace" shouldn't not tell too much >> about kernel internals. > > See my other replies on this topic. Somehow, we need a way of > describing the behavior that user-space sees. I think it's > inevitable that that means talking about what;s going on > "under the hood". > > Regarding Eric's point that "we run the danger of people beginning > to think they can depend upon bugs in the implementation": when it > comes to breaking the ABI, the presence or absence of documentation > doesn't save us on that point (Linus has a few times made his position > wrt to documentation clear). Which are interesting in this respect as a bug in the implementation that is a security issue can and will be changed, even if userspace breaks. Breaking userspace is not desirable but when there is no other reasonable choice it will happen. Eric -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
