linux-kernel - Re: [PATCH 1/1] gtp: fix use-after-free and null-ptr-deref in gtp_genl_dump

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Date: Wed, 24 Jan 2024 12:52:04 +0100
From: Eric Dumazet <edumazet@...gle.com>
To: kovalev@...linux.org
Cc: pablo@...filter.org, laforge@...monks.org, davem@...emloft.net, 
	kuba@...nel.org, pabeni@...hat.com, osmocom-net-gprs@...ts.osmocom.org, 
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org, nickel@...linux.org, 
	oficerovas@...linux.org, dutyrok@...linux.org
Subject: Re: [PATCH 1/1] gtp: fix use-after-free and null-ptr-deref in gtp_genl_dump_pdp()

On Wed, Jan 24, 2024 at 12:20 PM <kovalev@...linux.org> wrote:
>
> 24.01.2024 13:57, Eric Dumazet wrote:
> > Oh wait, this is a 5.10 kernel ?
> Yes, but the bug is reproduced on the latest stable kernels.
> > Please generate a stack trace using a recent tree, it is possible the
> > bug has been fixed already.
>
> See [PATCH 0/1] above, there's a stack for the 6.6.13 kernel at the
> bottom of the message.

Ah, ok. Not sure why you sent a cover letter for a single patch...

Setting a boolean, in a module that can disappear will not prevent the
module from disappearing.

This work around might work, or might not work, depending on timing,
preemptions, ....

Thanks.