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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.