From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 48A5F2110E; Tue, 29 Jul 2025 13:40:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753796405; cv=none; b=Ntnvdo0j2VF2J80RrVpC6oL9G0zcrhbeQkvZMF5V+HE9epeUL9x6LqzbyeX6J+OKLeQbBH/PUopJ2Q40xuz/HXaVfKjfIBw1AHHODlZye771qD5D1Sa92mudg9Iq3yPlPvQR8VxeVDSHyhTdfnQg/LRKnWmpAjMEv9qb2CLj8nI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753796405; c=relaxed/simple; bh=f/LGPw/5dHlTrw7lOR6Cg83JH1ggAoCnyHGQ66Ie3yA=; h=Date:From:To:Cc:Subject:Message-Id:In-Reply-To:References: Mime-Version:Content-Type; b=cLb5/jcS1pcxZN0PMqXTFYNp3ZnEcizoSRrJBNCguTuWxbQQkBJgeI1CZ6WIhVByRWYNENvfoA3lNv6gaWQD4NJGSHYtnGeP/1bbd1ViUszgy3ETCW4Hlgv7uD3OXhcMeepKsRBFHz6+2A8PoD0WAHIjmLB2aT5PTPKg/lFjFtY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Dqkkjz6Y; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Dqkkjz6Y" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CE713C4CEEF; Tue, 29 Jul 2025 13:40:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1753796404; bh=f/LGPw/5dHlTrw7lOR6Cg83JH1ggAoCnyHGQ66Ie3yA=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=Dqkkjz6Yz0TPt/dDJ3zE1lSYh5f71snL7ISfGBJgmkApPm0o8t+VLbMo1n7So/vTg d5MlDEjzD0Vfh5kxZrVa4JM2EwxmzcUHYnaQH25tiSkJ+z5jrZz11eaLV2dSKGlPmf slYo15lf7/m4aFVH1Cc+Q0s95rVSmQhLPOVoKh4SJPcAsQEGmUs63jLA0rhz61NPNa wPpWpBxdw1YNCS0Jm6FJfBXLhp3pFPJUNvuYeSHXLMwSXIJB6oiGwYk0EXMMS3udaM VoFr4stxRBEJxccV6UNbt5N2vYaJodc0pdp5i+xtMTbavumi0kSfYXqwrcGHocnGrK KsCxZjxg3Vnpw== Date: Tue, 29 Jul 2025 22:40:00 +0900 From: Masami Hiramatsu (Google) To: Josh Poimboeuf Cc: "Alan J. Wylie" , linux-kernel@vger.kernel.org, regressions@lists.linux.dev, stable@vger.kernel.org, Linus Torvalds , Masami Hiramatsu Subject: Re: "stack state/frame" and "jump dest instruction" errors (was Re: Linux 6.16) Message-Id: <20250729224000.2f23f59acc79a78f47c1624f@kernel.org> In-Reply-To: References: <871pq06728.fsf@wylie.me.uk> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Mon, 28 Jul 2025 08:42:44 -0700 Josh Poimboeuf wrote: > On Mon, Jul 28, 2025 at 09:41:35AM +0100, Alan J. Wylie wrote: > > #regzbot introduced: 6.15.8..6.16 > I don't have time to look at this for at least the next few days, but I > suspect this one: > > 1a3: 8f ea 78 10 c3 0a 06 00 00 bextr $0x60a,%ebx,%eax Thanks for finding! Indeed, this is encoded by XOP which is not currently supported by x86 decodeer. > > in which case the kernel's x86 decoder (which objtool also uses) needs > to be updated. OK, let me see how XOP works. Thank you, -- Masami Hiramatsu (Google)