Re: upstream kernel crashes

On Mon, Aug 15, 2022 at 12:46:36AM -0700, Andres Freund wrote:

Hi,

On Mon, Aug 15, 2022, at 00:29, Michael S. Tsirkin wrote:

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On Mon, Aug 15, 2022 at 12:11:43AM -0700, Andres Freund wrote:

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Hi,

On 2022-08-14 20:18:44 -0700, Linus Torvalds wrote:

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On Sun, Aug 14, 2022 at 6:36 PM Andres Freund [off-list ref] wrote:

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Some of the symptoms could be related to the issue in this thread, hence
listing them here

Smells like slab corruption to me, and the problems may end up being
then largely random just depending on who ends up using the allocation
that gets trampled on.

I wouldn't be surprised if it's all the same thing - including your
network issue.

Yea. As I just wrote in
https://postgr.es/m/20220815070203.plwjx7b3cyugpdt7%40awork3.anarazel.de I
bisected it down to one commit (762faee5a267). With that commit I only see the
networking issue across a few reboots, but with ebcce4926365 some boots oops
badly and other times it' "just" network not working.


[oopses]

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If somebody knowledgeable staring at 762faee5a267 doesn't surface somebody I
can create a kernel with some more debugging stuff enabled, if somebody tells
me what'd work best here.


Greetings,

Andres Freund

Thanks a lot for the work!
Just a small clarification:

So IIUC you see several issues, right?

Yes, although they might be related, as theorized by Linus upthread.

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With 762faee5a2678559d3dc09d95f8f2c54cd0466a7 you see networking issues.

Yes.

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With ebcce492636506443e4361db6587e6acd1a624f9 you see crashes.

Changed between rebooting. Sometimes the network issue, sometimes the crashes in the email you're replying to.

OK just adding:

    Signed-off-by: Xuan Zhuo [off-list ref]
    Acked-by: Jason Wang [off-list ref]
	L: virtualization@lists.linux-foundation.org
	L: netdev@vger.kernel.org

I think we can drop the original Cc list:

Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	Jens Axboe [off-list ref],
	James Bottomley [off-list ref],
	"Martin K. Petersen" [off-list ref],
	Guenter Roeck [off-list ref], linux-kernel@vger.kernel.org,
	Greg Kroah-Hartman [off-list ref]

but I'm not sure, maybe they want to be informed.

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MST