Messages in this thread | | | Date | Tue, 30 Jul 2019 10:27:31 +0100 | From | Will Deacon <> | Subject | Re: [PATCH 0/2] Don't use SIGMINSTKSZ when enforcing alternative signal stack size for compat tasks |
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On Mon, Jul 29, 2019 at 10:23:02PM +0200, Aurelien Jarno wrote: > On 2018-07-25 14:45, Will Deacon wrote: > > Hi all, > > > > The Debian folks have observed a failure in the 32-bit arm glibc testsuite > > when running under a 64-bit kernel. They tracked this down to sigaltstack(2) > > enforcing the alternative signal stack to be at least SIGMINSTKSZ bytes, > > which is higher for native arm64 tasks than compat 32-bit tasks. > > > > These patches resolve the issue by allowing an architecture to define > > COMPAT_SIGMINSTKSZ for compat tasks, which is then used by the sigaltstack > > checking code. > > > > Feedback welcome, > > > > Will > > > > --->8 > > > > Will Deacon (2): > > signal: Introduce COMPAT_SIGMINSTKSZ for use in compat_sys_sigaltstack > > arm64: compat: Provide definition for COMPAT_SIGMINSTKSZ > > Only the first patch went to the stable kernels. The second one is > missing, so the bug is still not fixed in those kernels. Would it be > possible to also get it included?
Damn, you're right. I think the autosel bot picked the first commit but not the second. In hindsight, we should've tagged them both, but oh well. I've posted the patch here for -stable, with you on cc:
https://lore.kernel.org/lkml/20190730092547.1284-1-will@kernel.org/T/#u
Will
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