Re: [PATCH net] net: nexthop: fix percpu use-after-free in remove_nh_grp_entry

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@xxxxxxxxxx>:

On Fri,  6 Mar 2026 18:38:20 -0500 you wrote:
> When removing a nexthop from a group, remove_nh_grp_entry() publishes
> the new group via rcu_assign_pointer() then immediately frees the
> removed entry's percpu stats with free_percpu(). However, the
> synchronize_net() grace period in the caller remove_nexthop_from_groups()
> runs after the free. RCU readers that entered before the publish still
> see the old group and can dereference the freed stats via
> nh_grp_entry_stats_inc() -> get_cpu_ptr(nhge->stats), causing a
> use-after-free on percpu memory.
> 
> [...]

Here is the summary with links:
  - [net] net: nexthop: fix percpu use-after-free in remove_nh_grp_entry
    https://git.kernel.org/netdev/net/c/b2662e7593e9

You are awesome, thank you!
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