netdev - Re: [PATCH v2 net 0/3] udp: Fix two integer overflows when sk->sk_rcvbuf is close to INT

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Message-ID: <20250327125119.47b25ff2@kernel.org>
Date: Thu, 27 Mar 2025 12:51:19 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Kuniyuki Iwashima <kuniyu@...zon.com>
Cc: Willem de Bruijn <willemdebruijn.kernel@...il.com>, "David S. Miller"
 <davem@...emloft.net>, David Ahern <dsahern@...nel.org>, Eric Dumazet
 <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>, Simon Horman
 <horms@...nel.org>, Kuniyuki Iwashima <kuni1840@...il.com>,
 <netdev@...r.kernel.org>
Subject: Re: [PATCH v2 net 0/3] udp: Fix two integer overflows when
 sk->sk_rcvbuf is close to INT_MAX.

On Tue, 25 Mar 2025 12:58:12 -0700 Kuniyuki Iwashima wrote:
> I got a report that UDP mem usage in /proc/net/sockstat did not
> drop even after an application was terminated.
> 
> The issue could happen if sk->sk_rmem_alloc wraps around due
> to a large sk->sk_rcvbuf, which was INT_MAX in our case.
> 
> The patch 2 fixes the issue, and the patch 1 fixes yet another
> overflow I found while investigating the issue.

Selftest doesn't apply after the net-next PR :(