From: Thomas Gleixner <tglx@linutronix.de>
To: Breno Leitao <leitao@debian.org>, peterz@infradead.org, bp@alien8.de
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@kernel.org>,
Vincent Guittot <vincent.guittot@linaro.org>,
Dietmar Eggemann <dietmar.eggemann@arm.com>
Subject: Re: general protection fault, probably for non-canonical address in pick_next_task_fair()
Date: Thu, 29 Feb 2024 23:58:42 +0100 [thread overview]
Message-ID: <87msri7u8t.ffs@tglx> (raw)
In-Reply-To: <ZeCo7STWxq+oyN2U@gmail.com>
On Thu, Feb 29 2024 at 07:55, Breno Leitao wrote:
> I've been running some stress test using stress-ng with a kernel with some
> debug options enabled, such as KASAN and friends (See the config below).
>
> I saw it in rc4 and the decode instructions are a bit off (as it is here
> also - search for mavabs in dmesg below and you will find something as `(bad)`,
> so I though it was a machine issue. But now I see it again, and I am sharing
> for awareness.
The (bad) is after the faulting instruction, but gives an hint:
2e: 0f 84 67 ff ff ff je 0xffffffffffffff9b
34: 48 89 ef mov %rbp,%rdi
37: e8 cf 70 76 00 call 0x76710b
3c: e9 .byte 0xe9
That's an invalid opcode, which means that memory is corrupted.
Thanks,
tglx
next prev parent reply other threads:[~2024-02-29 22:58 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-29 15:55 general protection fault, probably for non-canonical address in pick_next_task_fair() Breno Leitao
2024-02-29 22:58 ` Thomas Gleixner [this message]
2024-03-01 3:43 ` Abel Wu
2024-03-01 3:47 ` Abel Wu
2024-03-01 7:14 ` Chen Yu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87msri7u8t.ffs@tglx \
--to=tglx@linutronix.de \
--cc=bp@alien8.de \
--cc=dietmar.eggemann@arm.com \
--cc=leitao@debian.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@kernel.org \
--cc=peterz@infradead.org \
--cc=vincent.guittot@linaro.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox