linux-kernel - [PATCH v4 net 0/5] tcp/udp: Fix memory leaks and data races around IPV6

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Message-ID: <20221004171802.40968-1-kuniyu@amazon.com>
Date:   Tue, 4 Oct 2022 10:17:57 -0700
From:   Kuniyuki Iwashima <kuniyu@...zon.com>
To:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        David Ahern <dsahern@...nel.org>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>
CC:     Kuniyuki Iwashima <kuniyu@...zon.com>,
        Kuniyuki Iwashima <kuni1840@...il.com>,
        <netdev@...r.kernel.org>, <syzkaller-bugs@...glegroups.com>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH v4 net 0/5] tcp/udp: Fix memory leaks and data races around IPV6_ADDRFORM.

This series fixes some memory leaks and data races caused in the
same scenario where one thread converts an IPv6 socket into IPv4
with IPV6_ADDRFORM and another accesses the socket concurrently.

Note patch 1 and 5 conflict with these commits in net-next, respectively.

  * 24426654ed3a ("bpf: net: Avoid sk_setsockopt() taking sk lock when called from bpf")
  * 34704ef024ae ("bpf: net: Change do_tcp_getsockopt() to take the sockptr_t argument")


Changes:
  v4:
    * Patch 3:
      * Change UDPv6 Lite's sk->sk_prot->init() and sk->destruct() as well.
      * Move udplite_sk_init() from udplite.h to udplite.c.

  v3 (Resend): https://lore.kernel.org/netdev/20221003154425.49458-1-kuniyu@amazon.com/
    * CC blamed commits' EHOSTUNREACH authors to make patchwork happy

  v3: https://lore.kernel.org/netdev/20220929012542.55424-1-kuniyu@amazon.com/
    * Patch 2:
      * Add comment for np->rxopt.all = 0
      * Add inet6_cleanup_sock()
    * Patch 3:
      * Call inet6_cleanup_sock() instead of inet6_destroy_sock()

  v2: https://lore.kernel.org/netdev/20220928002741.64237-1-kuniyu@amazon.com/
    * Patch 3:
      * Move inet6_destroy_sock() from sk_prot->destroy()
        to sk->sk_destruct() and fix CONFIG_IPV6=m build failure
    * Patch 5:
      * Add WRITE_ONCE()s in tcp_v6_connect()
      * Add Reported-by tags and KCSAN log in changelog

  v1: https://lore.kernel.org/netdev/20220927161209.32939-1-kuniyu@amazon.com/


Kuniyuki Iwashima (5):
  tcp/udp: Fix memory leak in ipv6_renew_options().
  udp: Call inet6_destroy_sock() in setsockopt(IPV6_ADDRFORM).
  tcp/udp: Call inet6_destroy_sock() in IPv6 sk->sk_destruct().
  ipv6: Fix data races around sk->sk_prot.
  tcp: Fix data races around icsk->icsk_af_ops.

 include/net/ipv6.h       |  2 ++
 include/net/udp.h        |  2 +-
 include/net/udplite.h    |  8 --------
 net/core/sock.c          |  6 ++++--
 net/ipv4/af_inet.c       | 23 ++++++++++++++++-------
 net/ipv4/tcp.c           | 10 ++++++----
 net/ipv4/udp.c           |  9 ++++++---
 net/ipv4/udplite.c       |  8 ++++++++
 net/ipv6/af_inet6.c      | 15 ++++++++++++++-
 net/ipv6/ipv6_sockglue.c | 34 +++++++++++++++++++---------------
 net/ipv6/tcp_ipv6.c      |  6 ++++--
 net/ipv6/udp.c           | 15 ++++++++++++++-
 net/ipv6/udp_impl.h      |  1 +
 net/ipv6/udplite.c       |  9 ++++++++-
 14 files changed, 103 insertions(+), 45 deletions(-)

-- 
2.30.2