netdev - [PATCH RFC net 0/2] Fix race between datagram socket address change and rehash

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Message-ID: <20241114215414.3357873-1-sbrivio@redhat.com>
Date: Thu, 14 Nov 2024 22:54:12 +0100
From: Stefano Brivio <sbrivio@...hat.com>
To: Willem de Bruijn <willemdebruijn.kernel@...il.com>,
	Eric Dumazet <edumazet@...gle.com>
Cc: netdev@...r.kernel.org,
	Mike Manning <mmanning@...tta.att-mail.com>,
	David Gibson <david@...son.dropbear.id.au>,
	Ed Santiago <santiago@...hat.com>,
	Paul Holzinger <pholzing@...hat.com>
Subject: [PATCH RFC net 0/2] Fix race between datagram socket address change and rehash

Patch 2/2 fixes a race condition in the lookup of datagram sockets
between address change (triggered by connect()) and rehashing.

Patch 1/2 is a small optimisation to simplify 2/2.

Stefano Brivio (2):
  datagram: Rehash sockets only if local address changed for their
    family
  datagram, udp: Set local address and rehash socket atomically against
    lookup

 include/net/sock.h  |  2 +-
 include/net/udp.h   |  3 +-
 net/core/sock.c     | 13 ++++++--
 net/ipv4/datagram.c |  7 +++--
 net/ipv4/udp.c      | 76 +++++++++++++++++++++++++++++++--------------
 net/ipv4/udp_impl.h |  2 +-
 net/ipv4/udplite.c  |  2 +-
 net/ipv6/datagram.c | 30 +++++++++++++-----
 net/ipv6/udp.c      | 17 ++++++----
 net/ipv6/udp_impl.h |  2 +-
 net/ipv6/udplite.c  |  2 +-
 11 files changed, 108 insertions(+), 48 deletions(-)

-- 
2.40.1