netdev - [PATCH v3 net 0/2] tcp/rds: Fix use-after-free around kernel TCP reqsk.

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Message-ID: <20240306230458.28784-1-kuniyu@amazon.com>
Date: Wed, 6 Mar 2024 15:04:56 -0800
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>, Allison Henderson <allison.henderson@...cle.com>
CC: Kuniyuki Iwashima <kuniyu@...zon.com>, Kuniyuki Iwashima
	<kuni1840@...il.com>, <netdev@...r.kernel.org>, <linux-rdma@...r.kernel.org>,
	<rds-devel@....oracle.com>
Subject: [PATCH v3 net 0/2] tcp/rds: Fix use-after-free around kernel TCP reqsk.

syzkaller reported an warning of netns ref tracker for RDS per-netns
TCP listener, which commit 740ea3c4a0b2 ("tcp: Clean up kernel listener's
reqsk in inet_twsk_purge()") fixed for per-netns ehash.

This series fixes the bug in the partial fix and fixes the bug in the
global ehash.


Changes:
  v3:
    * Drop patch 2, 3, 5
    * Fix UAF by purging reqsk during netns dismantle.

  v2: https://lore.kernel.org/netdev/20240227011041.97375-1-kuniyu@amazon.com/
    * Add patch 1, 3, 5
    * Use __sock_create() instead of converting socket
    * Drop Sowmini from CC as it's bounced (patchwork may complain)

  v1: https://lore.kernel.org/netdev/20240223172448.94084-1-kuniyu@amazon.com/


Kuniyuki Iwashima (2):
  tcp: Restart iteration after removing reqsk in inet_twsk_purge().
  rds: tcp: Fix use-after-free of net in reqsk_timer_handler().

 net/ipv4/inet_timewait_sock.c | 4 +++-
 net/ipv4/tcp_minisocks.c      | 4 ----
 2 files changed, 3 insertions(+), 5 deletions(-)

-- 
2.30.2