Re: [syzbot] kernel BUG in warn_crc32c_csum_combine

[Herbert Xu]

On Sun, Oct 23, 2022 at 07:49:44PM -0700, Eric Dumazet wrote:
>
> pfkey_send_acquire() allocates and skb, and then later this skb seems
> to be too small to fit all dump info.
> 
> Maybe ->available status flips during the duration of the call ?
> 
> (So count_esp_combs() might return a value, but later dump_esp_combs()
> needs more space)

Thanks!

> Relevant patch suggests this could happen
> 
> commit ba953a9d89a00c078b85f4b190bc1dde66fe16b5
> Author: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
> Date:   Thu Aug 4 18:03:46 2022 +0800
> 
>     af_key: Do not call xfrm_probe_algs in parallel

Yes this looks like the same issue just in a different spot.

Cheers,
-- 
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt