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 C01EC70CCC; Wed, 13 Mar 2024 17:02:33 +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=1710349353; cv=none; b=tjCJIHzlSYHejBubxi23wXU8ZXSuAQk9RJKbLopAHM1CWXvG5ePZPdmbUU/Ic7wt+OJJcUuXAq+hG4S5gW0Px2Bx16MbjyCz4OrH86mz/HIBMrudkpefRlFGnUMUrCcgSCt1RxH87/8q5cA7+Ud3w+R3XpWYCKLzipCmaTxsCYI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710349353; c=relaxed/simple; bh=dxSDHYZ0NxYmU2ijrygEvgRz4Pt2IxLssXFRTn+O8pA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=S9JaTaZWuNgaBsFAYT2yp7msFcNzaSAt/A83n98W/EKKpl7ysaNeJ5FpJ3DQgmGcGcWk0rfmfOzMtjDolUFjjL54E3RI8IXrY4L5CbWoSQw3q5v2/RGrRk0OeS+cgjmu4V0neQUKzobIb8+8aHEJsF3HnSvQ09n7YiHnSl4xBsU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=kA7EDuXN; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="kA7EDuXN" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D8C22C433B1; Wed, 13 Mar 2024 17:02:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1710349353; bh=dxSDHYZ0NxYmU2ijrygEvgRz4Pt2IxLssXFRTn+O8pA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kA7EDuXNgd5qQVgYeTXljenr2c78bXb/WOaeFERCQchelz5fCsaaIGm9y/yA4Dkcm zcGRyVa+oMQgoNPNFIq8pyEWGP7gFYWLm6USrZwmhyYD8APOGiVYg5/2v40uFqrzoy a9pUZwx5GFVmKDrirhgiKfX3AaHqeJP06fYv5lwRI5AIeqhxYEtGd070XbADcKZuAe WQWuPxqcfakMfHman2GQCbE3JC7OTbaLKayv09rjnyt3fnjgOKlHN8hahsgV9x1hWm ITX32XHk5b7Lb3iJ8m2VXZdnKfd9eOvmC1S50B2prKb1hPz0rqYm3/4ACULFpBxUaj oIuC+SQwEO8MA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Jason Xing , Paolo Abeni , Sasha Levin Subject: [PATCH 5.4 17/51] netrom: Fix a data-race around sysctl_netrom_transport_maximum_tries Date: Wed, 13 Mar 2024 13:01:38 -0400 Message-ID: <20240313170212.616443-18-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240313170212.616443-1-sashal@kernel.org> References: <20240313170212.616443-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-KernelTest-Patch: http://kernel.org/pub/linux/kernel/v5.x/stable-review/patch-5.4.272-rc1.gz X-KernelTest-Tree: git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git X-KernelTest-Branch: linux-5.4.y X-KernelTest-Patches: git://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git X-KernelTest-Version: 5.4.272-rc1 X-KernelTest-Deadline: 2024-03-15T17:02+00:00 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit From: Jason Xing [ Upstream commit e799299aafed417cc1f32adccb2a0e5268b3f6d5 ] We need to protect the reader reading the sysctl value because the value can be changed concurrently. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Jason Xing Signed-off-by: Paolo Abeni Signed-off-by: Sasha Levin --- net/netrom/af_netrom.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c index 097f4f3b4929f..d05d56cb9c660 100644 --- a/net/netrom/af_netrom.c +++ b/net/netrom/af_netrom.c @@ -435,7 +435,7 @@ static int nr_create(struct net *net, struct socket *sock, int protocol, nr->t2 = msecs_to_jiffies(sysctl_netrom_transport_acknowledge_delay); nr->n2 = - msecs_to_jiffies(sysctl_netrom_transport_maximum_tries); + msecs_to_jiffies(READ_ONCE(sysctl_netrom_transport_maximum_tries)); nr->t4 = msecs_to_jiffies(sysctl_netrom_transport_busy_delay); nr->idle = -- 2.43.0