Re: [PATCH v5.10-v5.15 ] ipv6: use RCU in ip6_xmit()

[Greg KH]

On Thu, Feb 05, 2026 at 07:46:44AM +0000, Keerthana K wrote:
> From: Eric Dumazet <edumazet@xxxxxxxxxx>
> 
> [ Upstream commit 9085e56501d93af9f2d7bd16f7fcfacdde47b99c ]
> 
> Use RCU in ip6_xmit() in order to use dst_dev_rcu() to prevent
> possible UAF.
> 
> Fixes: 4a6ce2b6f2ec ("net: introduce a new function dst_dev_put()")
> Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx>
> Reviewed-by: David Ahern <dsahern@xxxxxxxxxx>
> Link: https://patch.msgid.link/20250828195823.3958522-4-edumazet@xxxxxxxxxx
> Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
> Signed-off-by: Keerthana K <keerthana.kalyanasundaram@xxxxxxxxxxxx>
> Signed-off-by: Shivani Agarwal <shivani.agarwal@xxxxxxxxxxxx>
> ---
>  net/ipv6/ip6_output.c | 35 +++++++++++++++++++++--------------
>  1 file changed, 21 insertions(+), 14 deletions(-)

We need working versions for newer kernels first.  Please resend this
when you have submitted patches for the newer releases.

thanks,

greg k-h