From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 66945145334; Wed, 19 Jun 2024 13:14:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718802845; cv=none; b=O7dC8p7p3Bsiy00VL3WLuk2zOt7Sgyiy1rb8CJZYIxAff1xCInLU7jSf5Br/DTMyec5vZOSygIM3wJ1cRGxsmTZJ1tAYmzxjqW6x01I67stEWplTvvItyZK9iJ/GaH0OsLtxRMHcrJqaqTcIIlKCjkzb9UAe3Rmo0C+maH0+z8Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718802845; c=relaxed/simple; bh=I/awBOsqi8yv+BDpqfGRPuWjsskbAoRs6ccN/2iRZNU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=SWPw4lBBfzewZbZpVVJNNknlWghjCEQBRUhScO6uZhIWxnwpe3k8k/YVCgxZGTGcPyJBA53kKOFPmW/iUCiGgDOto4kHef3RAqAwz3Sz0Y7t3iNstQ9psfyqpiDgffV72TAxH2yAnHR7Ke2y3wR7b+aiAbpXoPvBpoGEkvA9ECo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=I/PPaI4X; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="I/PPaI4X" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E0399C2BBFC; Wed, 19 Jun 2024 13:14:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1718802845; bh=I/awBOsqi8yv+BDpqfGRPuWjsskbAoRs6ccN/2iRZNU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=I/PPaI4XwkQ8dKEwEtFQOR0psuU8QGrxdjr42inOOEbD57GYdwWmgNN8pSJN9xym5 Pe+Ia/8SYrXcDckhzJ477DfjfMtltUYIfcB3F9OBi93BoPkVIZMmTjMSLLiAJXQBpz USQPYE6Y79e+lBHiV2xvzh54LtbaPFzgxgZmA4Bk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Kuniyuki Iwashima , Paolo Abeni , Sasha Levin Subject: [PATCH 6.9 066/281] af_unix: Annotate data-race of net->unx.sysctl_max_dgram_qlen. Date: Wed, 19 Jun 2024 14:53:45 +0200 Message-ID: <20240619125612.384812508@linuxfoundation.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240619125609.836313103@linuxfoundation.org> References: <20240619125609.836313103@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Kuniyuki Iwashima [ Upstream commit bd9f2d05731f6a112d0c7391a0d537bfc588dbe6 ] net->unx.sysctl_max_dgram_qlen is exposed as a sysctl knob and can be changed concurrently. Let's use READ_ONCE() in unix_create1(). Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Kuniyuki Iwashima Signed-off-by: Paolo Abeni Signed-off-by: Sasha Levin --- net/unix/af_unix.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c index 84bc1de2fd967..0c217ac17e053 100644 --- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -976,7 +976,7 @@ static struct sock *unix_create1(struct net *net, struct socket *sock, int kern, sk->sk_hash = unix_unbound_hash(sk); sk->sk_allocation = GFP_KERNEL_ACCOUNT; sk->sk_write_space = unix_write_space; - sk->sk_max_ack_backlog = net->unx.sysctl_max_dgram_qlen; + sk->sk_max_ack_backlog = READ_ONCE(net->unx.sysctl_max_dgram_qlen); sk->sk_destruct = unix_sock_destructor; u = unix_sk(sk); u->inflight = 0; -- 2.43.0