Messages in this thread | | | Subject | Re: [PATCH] sys_getppid oopses on debug kernel (v2) | From | Dave Hansen <> | Date | Tue, 08 Aug 2006 09:09:21 -0700 |
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On Tue, 2006-08-08 at 19:50 +0400, Kirill Korotaev wrote: > sys_getppid() optimization can access a freed memory. > On kernels with DEBUG_SLAB turned ON, this results in Oops. > As Dave Hansen noted, this optimization is also unsafe > for memory hotplug.
Yeah, I just tried coding up something to do a seqlock to note when tasks are freed, but it doesn't work. Unless somebody is really going crazy with getppid() on a very large system, this should be just fine.
-- Dave
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