Messages in this thread | | | Date | Wed, 31 Oct 2007 23:55:41 +0100 | From | Nick Piggin <> | Subject | Re: 2.6.23 regression: accessing invalid mmap'ed memory from gdb causes unkillable spinning |
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On Wed, Oct 31, 2007 at 08:59:41AM -0700, Linus Torvalds wrote: > > > On Wed, 31 Oct 2007, Nick Piggin wrote: > > > > Well the patch is right, in the context of the regression I introduced > > (and so it should probably go into 2.6.23). > > Yeah, it probably is fine for -stable. > > And if mine (which actually changes behaviour, in that it makes ptrace get > an access error) causes regressions, I guess we'll have to use that > compatible-with-old-behaviour one for 2.6.24 too. > > But I just rebooted and tested - the cleaned-up patch does seem to work > fine, and I get "Cannot access memory at address <xyz>" rather than any > reported problem. > > So I think I'll commit my version asap, and see if anybody reports that > they have a situation where they use ptrace() and expect zero back from a > shared mapping past the end.. And if there are issues, we can switch back > to the old broken behaviour with your patch,
No that would be great. Fingers crossed it won't cause any problems.
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