Messages in this thread | | | Subject | Re: [patch 0/6] lightweight robust futexes: -V3 | From | Daniel Walker <> | Date | Thu, 16 Feb 2006 08:33:04 -0800 |
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Another thing I noticed was that futex_offset on the surface looks like a malicious users dream variable .. I didn't notice security addressed at all in your initial write up . I was told it was a big topic at last years OLS .. In your write up you did say you corrupted the robust_list , but did you corrupt the offset? Is this even a concern?
Daniel
On Thu, 2006-02-16 at 10:41 +0100, Ingo Molnar wrote: > This is release -V3 of the "lightweight robust futexes" patchset. The > patchset can also be downloaded from: > > http://redhat.com/~mingo/lightweight-robust-futexes/ > > Changes since -V2: > > Ulrich Drepper ran the code through more glibc testcases, which > unearthed a couple of bugs: > > - fixed bug in the i386 and x86_64 assembly code (Ulrich Drepper) > > - fixed bug in the list walking futex-wakeups (found by Ulrich Drepper) > > - race fix: do not bail out in the list walk when the list_op_pending > pointer cannot be followed by the kernel - another userspace thread > may have already destroyed the mutex (and unmapped it), before this > thread had a chance to clear the field. > > - cleanup: renamed list_add_pending to list_op_pending. (the field is > used for list removals too) > > Ingo > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/
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