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 4DCEB187326; Wed, 30 Jul 2025 08:20:24 +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=1753863624; cv=none; b=UQfK/IfWocvLr7SrWjTJhiSP3qc+NkCk5MTxPWfVj2oZQrmurjwcikaM8F31lNDPufOlnb00p/tygkFHD95qUgRlOdghz/fRJByWvXuuEEEh5ad8PP9/+JDCHKcL/nw32BbWS4PlhRrcI0sE3+IxBXJzmyhPPV3oz3PaQt/B7sY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753863624; c=relaxed/simple; bh=G2xhbiG9MhxwFQfbZuB+oDrqa9cbn97T9Zn90EGVbF0=; h=Date:From:To:Cc:Subject:Message-Id:In-Reply-To:References: Mime-Version:Content-Type; b=PhYVSl1H/XgR6MVVA927vDVOsKlHdE546rjiFy/Ebo5rkgDoSXPCvdTYbflmsouBwjV79zx77fRX4tH8SliRuJI+xkib9s79n/XGfMQdZNxZmxwT0MjLkxC0VZXDbeDgVs1CATmL9ArCTq4OWGcEXtKdyBa3mY8KdaSY8QXAWvI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=gIU54rE/; 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="gIU54rE/" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2DE72C4CEF5; Wed, 30 Jul 2025 08:20:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1753863623; bh=G2xhbiG9MhxwFQfbZuB+oDrqa9cbn97T9Zn90EGVbF0=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=gIU54rE/53PmhiwB/a0q1TUMwg6FBnJm8rOIhcfkpcIf3TnXT5tJYQOq2om+0SfAb va+0nhaPM2mySuzIQuHiRS1yF9fJr0KHugT9fcDyKZJE9VBTJA3mcKm2C4vv22HEqP MSj4+h89kLmi6G5zTK2s4WChbvBA74cevzu5iY3BCf7hEJNh2Q9uxXVa+6YZdAy/1B VtMhDon9WBCd8SUPzQycZt1H+gAvrZokQx7ucmeRl+EGdVQ5BD7xi4Z0AJxjtZW4L0 EzmBm56rCDVMlOUjWy1Qd1MnpwEG+3wggI+on2PDjIFhlF6Y87UPOB/kJvP4uXUsQx /RO/Zw4u25ebg== Date: Wed, 30 Jul 2025 17:20:20 +0900 From: Masami Hiramatsu (Google) To: Masami Hiramatsu (Google) Cc: Josh Poimboeuf , "Alan J. Wylie" , linux-kernel@vger.kernel.org, regressions@lists.linux.dev, stable@vger.kernel.org, Linus Torvalds Subject: Re: "stack state/frame" and "jump dest instruction" errors (was Re: Linux 6.16) Message-Id: <20250730172020.00a4dd1ad453d94c7ef47f30@kernel.org> In-Reply-To: <20250729224000.2f23f59acc79a78f47c1624f@kernel.org> References: <871pq06728.fsf@wylie.me.uk> <20250729224000.2f23f59acc79a78f47c1624f@kernel.org> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: stable@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 Tue, 29 Jul 2025 22:40:00 +0900 Masami Hiramatsu (Google) wrote: > 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. I've sent it to; https://lore.kernel.org/all/175386161199.564247.597496379413236944.stgit@devnote2/ I confirmed it worked with the XOP encoded "bextr". Thank you, -- Masami Hiramatsu (Google)