From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794063963; b=Z6+DWakm+JRYuyMbNmU46TYMhmMVN0ALfRlPTJdExt7J/qtnJWW/eWfzbgZQXJT0YMUy fMAt2GhBRtReGSKKWsq93lYy7dLpt8sVODW4yim2xn9YqrXtklU4aO3JOOmA0vrR81fDY gihA+oPrmu/4/Z18nN8vFDSXjXD2rFWXT5QjKlgc42xAQcMfIKchqn40JLnxHA96NW77/ N5UKh+dns39BsCXUbTtygWKqHB3LUF5zKM2BjX1oAkydUizA6gBqHhKtX4BcC8RF+N5pu sEcUPc5L+ttFmpzHoo/fuIN+rdHH02LMQx+ZTeNwVvquN0stdKVMdWA5z9FmQhE6zOg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794063963; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=G8qlTyWqRIcwMA0UCy5qSmZmsQqwsg/Msm2SO+nKJls=; b=HsgbzalfsaxmMBHO/r0kQ6cu7nec1rnhuDXdLfKLJZTGi7g9xOTcBymaehuUJ39gEdrG TKFpeIqJJQCcBdfF98PhF+K4JKL1vv9iKPLuMmqYDTGVOKo5I1bvQ7hhIXwu/Egrp7Qxm yMr47BsC/G6EuprwcBKD68FC1OWHF0+vFgrG7mJMT36U4rUtcju+QoCMRse01tuXY1GUU lQ6veP0d+UHppYxhLZMuLZGVn5t13QeWN0oHn5znRX5X0f5TbBOHyeiBJCo05TtHfGbXZ ajOpzGYzl1MSMQsMoV9DUF2HpskDgue3iWn66Q7vQWsCzJJOv8yLBiap9dPqGsZrPZQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=BAjVbi5w; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8519D606EE97; Sat, 7 Nov 2026 15:06:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=BAjVbi5w Received: by smtp.kernel.org (Postfix) with ESMTPSA id 040B91F008A7; Sat, 7 Nov 2026 15:06:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1794063963; bh=G8qlTyWqRIcwMA0UCy5qSmZmsQqwsg/Msm2SO+nKJls=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=BAjVbi5wrQwTrSADjum36Q/A4U6AYxmRMX3eaw0fxcqBIPHKazPVZnKCZLeU61IjP U3i3G1/fydEyISBfTlsA8On/uQWAoS0wbCCvOnU4vAm34ZFwZLyLk2LTxANC39NIS3 IjUAX8qFpauq0Lmda1zfPfkHBlBcIZifCcDWLpFA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Runyu Xiao , Tom Lendacky , Herbert Xu , Sasha Levin , "Mario Limonciello (AMD)" Subject: [PATCH 7.3 0150/1257] crypto: ccp - Initialize DBC ioctl mutex before registering device Date: Sat, 7 Nov 2026 08:40:46 -0500 Message-ID: <20261107134943.457845686@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261107134939.434104957@linuxfoundation.org> References: <20261107134939.434104957@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: stable@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 7.3-stable review patch. If anyone has any objections, please let me know. ------------------ From: Runyu Xiao [ Upstream commit e9b1d168f2a70c0764d5748893fdf631c504c171 ] dbc_dev_init() registers the DBC misc device before initializing ioctl_mutex. Once misc_register() publishes the device, userspace can open it and invoke dbc_ioctl() while the mutex is still uninitialized. Initialize ioctl_mutex before calling misc_register() so the published ioctl callback always sees an initialized mutex. Fixes: c04cf9e14f10 ("crypto: ccp - Add support for fetching a nonce for dynamic boost control") Cc: stable@vger.kernel.org Link: https://lore.kernel.org/all/20260829133410.1708684-1-runyu.xiao@seu.edu.cn/ Signed-off-by: Runyu Xiao Assisted-by: Codex:GPT-5 Reviewed-by: Tom Lendacky Reviewed-by: Mario Limonciello (AMD) > --- Signed-off-by: Herbert Xu Signed-off-by: Sasha Levin --- drivers/crypto/ccp/dbc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/crypto/ccp/dbc.c b/drivers/crypto/ccp/dbc.c index 410084a9039c9..4db49a14550c9 100644 --- a/drivers/crypto/ccp/dbc.c +++ b/drivers/crypto/ccp/dbc.c @@ -236,6 +236,8 @@ int dbc_dev_init(struct psp_device *psp) goto cleanup_mbox; } + mutex_init(&dbc_dev->ioctl_mutex); + dbc_dev->char_dev.minor = MISC_DYNAMIC_MINOR; dbc_dev->char_dev.name = "dbc"; dbc_dev->char_dev.fops = &dbc_fops; @@ -244,8 +246,6 @@ int dbc_dev_init(struct psp_device *psp) if (ret) goto cleanup_mbox; - mutex_init(&dbc_dev->ioctl_mutex); - return 0; cleanup_mbox: -- 2.53.0