From: Masami Hiramatsu (Google) <mhiramat@kernel.org>
To: Josh Poimboeuf <jpoimboe@kernel.org>
Cc: "Alan J. Wylie" <alan@wylie.me.uk>,
linux-kernel@vger.kernel.org, regressions@lists.linux.dev,
stable@vger.kernel.org,
Linus Torvalds <torvalds@linux-foundation.org>,
Masami Hiramatsu <mhiramat@kernel.org>
Subject: Re: "stack state/frame" and "jump dest instruction" errors (was Re: Linux 6.16)
Date: Tue, 29 Jul 2025 22:40:00 +0900 [thread overview]
Message-ID: <20250729224000.2f23f59acc79a78f47c1624f@kernel.org> (raw)
In-Reply-To: <hla34nepia6wyi2fndx5ynud4dagxd7j75xnkevtxt365ihkjj@4p746zsu6s6z>
On Mon, 28 Jul 2025 08:42:44 -0700
Josh Poimboeuf <jpoimboe@kernel.org> 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) <mhiramat@kernel.org>
next prev parent reply other threads:[~2025-07-29 13:40 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-27 21:58 Linux 6.16 Linus Torvalds
2025-07-28 8:41 ` "stack state/frame" and "jump dest instruction" errors (was Re: Linux 6.16) Alan J. Wylie
2025-07-28 15:42 ` Josh Poimboeuf
2025-07-29 5:33 ` Linus Torvalds
2025-07-29 13:40 ` Masami Hiramatsu [this message]
2025-07-30 8:20 ` Masami Hiramatsu
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