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Date: Wed, 9 Oct 2013 21:02:31 +0200 From: Peter Zijlstra <peterz@...radead.org> To: Jakub Jelinek <jakub@...hat.com> Cc: Oleg Nesterov <oleg@...hat.com>, Fengguang Wu <fengguang.wu@...el.com>, Linus Torvalds <torvalds@...ux-foundation.org>, Ingo Molnar <mingo@...nel.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Richard Henderson <rth@...ddle.net> Subject: Re: [x86] BUG: unable to handle kernel paging request at 00740060 On Wed, Oct 09, 2013 at 08:16:13PM +0200, Jakub Jelinek wrote: > Confirmed as gcc bug, filed http://gcc.gnu.org/PR58670 > Seems all of 4.[6-9] miscompile it. Will have a look tomorrow > unless somebody beats me to it. But historically, the case where > asm goto labels jump to fallthru basic block had numerous problems in the > past. That bug lists the component as middle end; this suggests x86_64 would be vulnerable too, can you confirm? So far we've only observed the wrong code on i386 targets, x86_64 targets appeared correct. -- 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/
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