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 ACF3D2DCB67; Mon, 14 Apr 2025 13:32:04 +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=1744637524; cv=none; b=DFIdHEnSXJJFO/ZgbTfmtiFgbbJO6v85wovtXugDLpNV4xSebySAvU9NOigiB+1D611nUMCdUlgcfl0tN2taC8NoDU52E1OLjl2dWvTScDHVp83q5IPCgy2jzc1L+jvCHwC0zuMJU7I46x05IED0IrGx3fykjgwD6kFwlFcV+pg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744637524; c=relaxed/simple; bh=pwIExdFiYdxJXREBib34JoKBikEhRR4vg+205pXMkcw=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=PX8ChJZwCeu/CtHkG3ZHctl2M2i1SQuXITJrbyk5Rj3B6wGCc3C4kt8rdgX2cM4+fncHJo3RLwhvzjPSAdMjbO9lNC0Vi8IqK6JuGQkTWTRGODS0SBNdYkYX7m6kjqQB0r5viYQZFF7B3QNfXenz31vPEsrOWhp8b0qich7Tp2A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=NhRCVoRv; 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="NhRCVoRv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 97702C4CEE2; Mon, 14 Apr 2025 13:32:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1744637524; bh=pwIExdFiYdxJXREBib34JoKBikEhRR4vg+205pXMkcw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NhRCVoRvkOHJlk3f5GOTo+ylU9cg9r4TR/95ZHdhJDH7nucBPIgFWhZXPnzqQmQuy oavzVT28K61wcHmOhndo6i03vGOHBfuSjdlq78wTdZrYkWUaNV8USHDVAbnU/wvedw EdFrds5B715M9EEA/ac1woHDSI7QJBqF5IJQ3grcHxzVPbdg0LMXH6/LdDJ62dyXk5 PPX+chQUSi07bvcTGiAFllSwbPU89mOL8Tz9QrdcxF1+rkl03jOEYPQ8e7eMkieavY QPD5ZnN3H1IrIzrlshMAuFDwHcFH8pJvmAUPMZvOog/YHPg7yoOiUBGOxH2KusNpJl SH34Ev7i7ObnA== 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 5.10 02/11] udmabuf: fix a buf size overflow issue during udmabuf creation Date: Mon, 14 Apr 2025 09:31:49 -0400 Message-Id: <20250414133158.681045-2-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250414133158.681045-1-sashal@kernel.org> References: <20250414133158.681045-1-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 5.10.236 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 14b79458ac7f4..597a92438afc1 100644 --- a/drivers/dma-buf/udmabuf.c +++ b/drivers/dma-buf/udmabuf.c @@ -177,7 +177,7 @@ 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