Re: [PATCH net] ipv6: ioam: fix type confusion of dst_entry

[patchwork-bot+netdevbpf]

Hello:

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

On Thu, 18 Jun 2026 18:43:35 +0800 you wrote:
> IOAM uses a dummy dst_entry(null_dst) to mark that the destination should
> not be changed after the transformation. This dst is stored in the IOAM lwt
> state and may be passed to dst_cache_set_ip6().
> 
> However, the IPv6 dst cache path eventually calls rt6_get_cookie(), which
> treats the dst_entry as part of a struct rt6_info. Since the null_dst was
> embedded directly as a struct dst_entry in struct ioam6_lwt, this resulted
> in an invalid cast and rt6_get_cookie() reading fields from the wrong
> object.
> 
> [...]

Here is the summary with links:
  - [net] ipv6: ioam: fix type confusion of dst_entry
    https://git.kernel.org/netdev/net/c/9ed19e11d214

You are awesome, thank you!
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