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 544B815218A; Tue, 2 Jul 2024 17:11:54 +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=1719940314; cv=none; b=rgGswdk9mL2ioqVD7OeZo/e47E9xSFsVAOzA96aUiHPNIk8XKd617z0H/9T9goFz53lC1KqxvTCrWj8dXN+F4OTWn2kqnAMUwjvhQqB/lLCoWRpMQu/b0VnnVxbxENoZ4PQRWtK8yxZlP6NHcxyfP62hmdLwO+3ZOR4KthkiJFg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719940314; c=relaxed/simple; bh=5t0RyREuQ9zsH0143+R1R8Uh2XxRivtbAL5kACEd9tM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=ix0nJ29F1p/8hG5P3urIiay1swgemfwG0DbwsAnedabLw81CsuKikixjfBymJwgpkrGSqvPyxKTozCOcDbIBCOmG+jUNN56XP5tU5SNBNMwb3hiWccPRSOadUkARuujGaiWsRnXsIVMKKCzqWRYtnHTfyeU3ywV32QCgYzomI5k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=1WSd9brr; 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="1WSd9brr" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CA2D4C116B1; Tue, 2 Jul 2024 17:11:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1719940314; bh=5t0RyREuQ9zsH0143+R1R8Uh2XxRivtbAL5kACEd9tM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=1WSd9brrLDuCQn9Fi1MD5bE6vZUSfPDxxx5p7XiBC6FQceiw6QwDZ8o4EVe3ZP71v Q6S3A4tFpvnlkgDfMP+rvsL+zwq3kZ0DaW0LbOfYthIjHx/CHeSVT1n1z2AowZdJoq CEBldcOIa4rpAp/WZydU5xiT+9zHd5O+Im1hkcvY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Ricardo Ribalda , Hans Verkuil , Sasha Levin Subject: [PATCH 6.9 086/222] media: dvbdev: Initialize sbuf Date: Tue, 2 Jul 2024 19:02:04 +0200 Message-ID: <20240702170247.264321585@linuxfoundation.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240702170243.963426416@linuxfoundation.org> References: <20240702170243.963426416@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 6.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ricardo Ribalda [ Upstream commit 17d1316de0d7dc1bdc5d6e3ad4efd30a9bf1a381 ] Because the size passed to copy_from_user() cannot be known beforehand, it needs to be checked during runtime with check_object_size. That makes gcc believe that the content of sbuf can be used before init. Fix: ./include/linux/thread_info.h:215:17: warning: ‘sbuf’ may be used uninitialized [-Wmaybe-uninitialized] Signed-off-by: Ricardo Ribalda Signed-off-by: Hans Verkuil Signed-off-by: Sasha Levin --- drivers/media/dvb-core/dvbdev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/dvb-core/dvbdev.c b/drivers/media/dvb-core/dvbdev.c index 733d0bc4b4cc3..b43695bc51e75 100644 --- a/drivers/media/dvb-core/dvbdev.c +++ b/drivers/media/dvb-core/dvbdev.c @@ -956,7 +956,7 @@ int dvb_usercopy(struct file *file, int (*func)(struct file *file, unsigned int cmd, void *arg)) { - char sbuf[128]; + char sbuf[128] = {}; void *mbuf = NULL; void *parg = NULL; int err = -EINVAL; -- 2.43.0