netdev - [PATCH v2 net 0/2] af_unix: Fix a NULL deref in sk_diag_dump

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Date:   Sun, 27 Nov 2022 10:24:10 +0900
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>
CC:     Felipe Gasper <felipe@...ipegasper.com>,
        Wei Chen <harperchen1110@...il.com>,
        Kuniyuki Iwashima <kuniyu@...zon.com>,
        "Kuniyuki Iwashima" <kuni1840@...il.com>, <netdev@...r.kernel.org>
Subject: [PATCH v2 net 0/2] af_unix: Fix a NULL deref in sk_diag_dump_uid().

The first patch fixes a NULL deref when we dump a AF_UNIX socket's UID,
and the second patch adds a repro/test for such a case.


Changes:
  v2:
    * Get user_ns from NETLINK_CB(in_skb).sk.
    * Add test.

  v1: https://lore.kernel.org/netdev/20221122205811.20910-1-kuniyu@amazon.com/


Kuniyuki Iwashima (2):
  af_unix: Get user_ns from in_skb in unix_diag_get_exact().
  af_unix: Add test for sock_diag and UDIAG_SHOW_UID.

 net/unix/diag.c                               |  20 +-
 tools/testing/selftests/net/.gitignore        |   1 +
 tools/testing/selftests/net/af_unix/Makefile  |   2 +-
 .../testing/selftests/net/af_unix/diag_uid.c  | 178 ++++++++++++++++++
 4 files changed, 192 insertions(+), 9 deletions(-)
 create mode 100644 tools/testing/selftests/net/af_unix/diag_uid.c

-- 
2.30.2