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 919EA1C07 for ; Wed, 28 Dec 2022 16:12:37 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DF479C433D2; Wed, 28 Dec 2022 16:12:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1672243957; bh=8jvAjcf/lfd4jbxmi86lR8uOaOjt4H4vhAARLh26D1k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MEEDpxiuR1iYZJEB1HHbehVNCeD83FnB9jpcsLBHyRnw0ATCmsxzpbKyVkci8DAUY RnChE/txceC9Ob4iPXuNLNORrDoLJ81KQog7c85y0dlyF39Rt4AfomTVXPNRT6k7t/ jPhpo9jy0hOsCthu8cyEs+VTikrgM3lqsqJ7cfoc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Harshit Mogalapalli , "Martin K. Petersen" , Sasha Levin Subject: [PATCH 6.0 0622/1073] scsi: scsi_debug: Fix a warning in resp_verify() Date: Wed, 28 Dec 2022 15:36:50 +0100 Message-Id: <20221228144344.938782344@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20221228144328.162723588@linuxfoundation.org> References: <20221228144328.162723588@linuxfoundation.org> User-Agent: quilt/0.67 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 From: Harshit Mogalapalli [ Upstream commit ed0f17b748b20271cb568c7ca0b23b120316a47d ] As 'vnum' is controlled by user, so if user tries to allocate memory larger than(>=) MAX_ORDER, then kcalloc() will fail, it creates a stack trace and messes up dmesg with a warning. Add __GFP_NOWARN in order to avoid too large allocation warning. This is detected by static analysis using smatch. Fixes: c3e2fe9222d4 ("scsi: scsi_debug: Implement VERIFY(10), add VERIFY(16)") Signed-off-by: Harshit Mogalapalli Link: https://lore.kernel.org/r/20221112070031.2121068-1-harshit.m.mogalapalli@oracle.com Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/scsi_debug.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index 1355820b9733..077782eb55e7 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -4436,7 +4436,7 @@ static int resp_verify(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) if (ret) return ret; - arr = kcalloc(lb_size, vnum, GFP_ATOMIC); + arr = kcalloc(lb_size, vnum, GFP_ATOMIC | __GFP_NOWARN); if (!arr) { mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, INSUFF_RES_ASCQ); -- 2.35.1