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 A0CBC2DA112; Mon, 14 Apr 2025 13:31:31 +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=1744637491; cv=none; b=UDcw9RaJc4PePXZyFhmMh2HTsYOV1MS0+iHcHMH+jbMlxIvaDTWqHJSsh5bmip483+8pyCyFt0birJHyLKvbMGH7rNNfjC+1DRJhdEZdD6QagSKoCSQBCoBn43xAR+Z+eZknL+mTjZJq8rm2UTm1lFxGvrUKWC3ll0p1eThVWwk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744637491; c=relaxed/simple; bh=SRRtruO+5wCGygThqaBjgo4hqGGtgJoA5gdGoFLfgTE=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=iwAQyYhulhzgPb/ENXDRJzTk6Hxpb/9L/c8TOeFa9GcntXTTRJJa5dsWY03H97NufQFYeP9LoIdO6whD8Q+tWTTz3tbWlkvc4e8RG/epIVNm6ASReg15t3DBPBBZrv5MfzW6Ml379XT55T4VPs5cFrKMNEq2uPCUnPJpW5TaNzg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=CWgOJJKT; 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="CWgOJJKT" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D6FACC4CEE2; Mon, 14 Apr 2025 13:31:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1744637491; bh=SRRtruO+5wCGygThqaBjgo4hqGGtgJoA5gdGoFLfgTE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CWgOJJKTmVAfvwUd+XoBqV4t05PlllE10XINKOZa1bgV9XMixm3Ube51WTuDi2cQI o07Hkfv0WcJJn7Zi0AqJg6MoiNUpIAy2KFeBdit8bBgFOXKCR1xPWKizs75hwrwwOM WufqDTHrVifHEDjW9BmXT2km3Ykp1y029f0D6LjzD+td4j9p8h7j1k1n5Zp6/P6WnK oarv7QPSVWsXOA6GPmKpPU043UnyU4IIjaYF6DzH+Oy8su6lgrGbrtwP7OxmEdHi/y 2HcwyUO1D8kGC9Qpq1xLjs5KishWgmhmDq0f2Q9RqkT8lMT+tZMNGKwyqHmx1bgfJx dLmFIywDNxyLA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Xiaogang Chen , Xiaogang Chen , =?UTF-8?q?Christian=20K=C3=B6nig?= , Sasha Levin , kraxel@redhat.com, vivek.kasireddy@intel.com, sumit.semwal@linaro.org, dri-devel@lists.freedesktop.org, linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org Subject: [PATCH AUTOSEL 5.15 02/15] udmabuf: fix a buf size overflow issue during udmabuf creation Date: Mon, 14 Apr 2025 09:31:12 -0400 Message-Id: <20250414133126.680846-2-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250414133126.680846-1-sashal@kernel.org> References: <20250414133126.680846-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.15.180 Content-Transfer-Encoding: 8bit From: Xiaogang Chen [ Upstream commit 021ba7f1babd029e714d13a6bf2571b08af96d0f ] by casting size_limit_mb to u64 when calculate pglimit. Signed-off-by: Xiaogang Chen Link: https://patchwork.freedesktop.org/patch/msgid/20250321164126.329638-1-xiaogang.chen@amd.com Signed-off-by: Christian König Signed-off-by: Sasha Levin --- drivers/dma-buf/udmabuf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c index a8094d57d2d06..84f7611c765b9 100644 --- a/drivers/dma-buf/udmabuf.c +++ b/drivers/dma-buf/udmabuf.c @@ -186,7 +186,7 @@ static long udmabuf_create(struct miscdevice *device, if (!ubuf) return -ENOMEM; - pglimit = (size_limit_mb * 1024 * 1024) >> PAGE_SHIFT; + pglimit = ((u64)size_limit_mb * 1024 * 1024) >> PAGE_SHIFT; for (i = 0; i < head->count; i++) { if (!IS_ALIGNED(list[i].offset, PAGE_SIZE)) goto err; -- 2.39.5