Re: [PATCH net v2 0/3] ipv4: handle nexthop group shrink races
From: patchwork-bot+netdevbpf
Date: Tue Oct 06 2026 - 19:32:16 EST
Hello:
This series was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@xxxxxxxxxx>:
On Fri, 2 Oct 2026 13:50:57 +0900 you wrote:
> fib_info_num_path() and fib_info_nhc() can observe different RCU
> generations of a replaceable nexthop group. An indexed consumer can
> therefore accept an index from a larger group and receive NULL after a
> concurrent shrink.
>
> Patch 1 is unchanged from v1. Patch 2 addresses the analogous
> fib_dump_info_fnhe() race Ido identified. Auditing the remaining
> accessor pairs found the same issue in the RCU-only hardware-flag
> notification path, fixed by patch 3. Separate patches retain the
> correct Fixes tag for each concurrency boundary.
>
> [...]
Here is the summary with links:
- [net,v2,1/3] ipv4: stop PMTU walk when nexthop group shrinks
https://git.kernel.org/netdev/net/c/6619e01855e6
- [net,v2,2/3] ipv4: stop exception dump when nexthop group shrinks
https://git.kernel.org/netdev/net/c/4f4afc07dcb2
- [net,v2,3/3] ipv4: stop route notification sizing when nexthop group shrinks
https://git.kernel.org/netdev/net/c/d3daa33c7af9
You are awesome, thank you!
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