ACK: [SRU][O/N/J/F][PATCH 0/1] CVE-2024-53164

[Magali Lemes]

On 07/01/2025 22:20, Ian Whitfield wrote:
> [Impact]
> 
> Changes to sch->q.qlen around qdisc_tree_reduce_backlog() need to happen
> _before_ a call to said function because otherwise it may fail to notify
> parent qdiscs when the child is about to become empty.
> 
> [Backport]
> 
> The patch was applied cleanly.
> 
> [Fix]
> 
> Oracular:	backport
> Noble:		backport
> Jammy:		backport
> Focal:		backport
> Bionic: 	sent to ESM ML
> Xenial:		not affected
> 
> [Test Case]
> 
> Compile and boot tested
> 
> [Where problems could occur]
> 
> This fix affects those who use CAKE or CHOKe for network scheduling. An
> issue with this fix would be visible to the user via unexpected network
> behavior or potentially a use-after-free.
> 
> Lion Ackermann (1):
>    net: sched: fix ordering of qlen adjustment
> 
>   net/sched/sch_cake.c  | 2 +-
>   net/sched/sch_choke.c | 2 +-
>   2 files changed, 2 insertions(+), 2 deletions(-)
> 

Acked-by: Magali Lemes <magali.lemes at canonical.com>