Re: [PATCH] xfrm: account XFRMA_IF_ID and XFRMA_OFFLOAD_DEV in msgsize helpers

[Nicolas Dichtel]

Le 11/10/2026 à 10:06, Adrian Martinez Garcia a écrit :
> Hi,
> 
> The xfrm_acquire_msgsize(), xfrm_polexpire_msgsize() and xfrm_expire_msgsize()
> helpers do not account for the XFRMA_IF_ID (8 B) and XFRMA_OFFLOAD_DEV
> (12 B) attributes that their sibling builders emit. The deficit of up to
> 20 B can trigger BUG_ON(err < 0) in the callers -> latent kernel panic.
> 
> This is a sibling of CVE-2026-43107 (fix 7081d46d32 only corrected the
> aevent pair; these three pairs were left unfixed).
> 
> Fixes: 7e6526404ade
> Signed-off-by: Adrian Martinez <adrimg3196@xxxxxxxxx>
> 
> I used Claude Code to help with the audit.
Please, don't use attachments.

Here is the doc about the process:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst#n278

Regards,
Nicolas