Re: [PATCH] netlink: make sure nladdr has correct size in netlink_connect()

From: David Miller
Date: Sun Mar 25 2018 - 21:15:41 EST


From: Alexander Potapenko <glider@xxxxxxxxxx>
Date: Fri, 23 Mar 2018 13:49:02 +0100

> KMSAN reports use of uninitialized memory in the case when |alen| is
> smaller than sizeof(struct sockaddr_nl), and therefore |nladdr| isn't
> fully copied from the userspace.
>
> Signed-off-by: Alexander Potapenko <glider@xxxxxxxxxx>
> Fixes: 1da177e4c3f41524 ("Linux-2.6.12-rc2")
> ---
> v2: fixed a typo spotted by Eric Dumazet

Applied and queued up for -stable, thank you.