lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Fri, 9 Jan 2015 16:46:08 +0000 From: Russell King - ARM Linux <linux@....linux.org.uk> To: Daniel Thompson <daniel.thompson@...aro.org> Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, patches@...aro.org, linaro-kernel@...ts.linaro.org, John Stultz <john.stultz@...aro.org>, Sumit Semwal <sumit.semwal@...aro.org> Subject: Re: [PATCH] arm: Remove early stack deallocation from restore_user_regs On Mon, Jan 05, 2015 at 03:12:38PM +0000, Daniel Thompson wrote: > Currently restore_user_regs deallocates the SVC stack early in > its execution and relies on no exception being taken between > the deallocation and the registers being restored. The introduction > of a default FIQ handler that also uses the SVC stack breaks this > assumption and can result in corrupted register state. > > This patch works around the problem by removing the early > stack deallocation and using r2 as a temporary instead. I have > not found a way to do this without introducing an extra mov > instruction to the macro. > > Signed-off-by: Daniel Thompson <daniel.thompson@...aro.org> > --- Please put it in the patch system, thanks. I think we should queue this one for stable too, as I think we need this for v3.18 (as a result of c0e7f7ee717e2b4c5791e7422424c96b5008c39e, ARM: 8150/3: fiq: Replace default FIQ handler)? -- FTTC broadband for 0.8mile line: currently at 10.5Mbps down 400kbps up according to speedtest.net. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists