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 60DD52D29CC; Mon, 14 Apr 2025 13:30:53 +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=1744637454; cv=none; b=RBiTHx1TS9kEcEaGVoU6HGgDdVNRdKQMaciWCutQSEAu+g4ZaI65a97jkY5upPskCtQaLThK1wy2c+jfcaI2exvMu79LXLjq9Bn5oJCC7VdPK6hErTmoXewP/4QEZzAgR8fQHD/t+wfsMfPIXO+1WTNQ6NQ6rUSW6WQhngDvLUo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744637454; c=relaxed/simple; bh=c5JUs1HRSEIEFfoOIVFphwrjz9S7JRsO0j+g4xWdsgk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=CKTXS2L5K4eR4DHYbZiWs92TmatnFGj9wmbIwF0yiTngMYEjBc6s/tdiKEAM++1RB9AI9LP1rj4h1c92UXeKtHpf3FZ1E8UESTnkGqqmajOFzLTwlK3Ckvuv4ZT5HBBO1sHlZz8QYRH8svWDlJ0igkfSOQooSJwF5gffHWJgECM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=brNgEwb2; 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="brNgEwb2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 263F8C4CEE9; Mon, 14 Apr 2025 13:30:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1744637453; bh=c5JUs1HRSEIEFfoOIVFphwrjz9S7JRsO0j+g4xWdsgk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=brNgEwb21m3ttcWoIKD/g862mlc06jmuGtwgShLpsIs7tD0Yi3Yk2iz1M2OXERDXQ vq4tHCXfVQZdb2LM82XpD2qNPOV0Plo9+mGkRXjxl1z7DMV0fOSrLiP6CERQCcZ3NP oOXHIG+tQlGVqs4HORLNZYRI4SbfQZHzJ8K4gpYOYcNbikcDM9f1n3jrmKSdiTfNUc YkdwXdE/oDyoXflxm0typZlkLilsg1hkP1WgkBE6418NSjeDFUwdo4tDfzoxb0EaMa +oqxgGxWWnW0dcOJrtGWQbaa9+K0YN/UV4bHx8lhRxNVPFjNd2HBLXjZFFY1ACBiqF D6mG06MS1Easg== 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 6.1 02/17] udmabuf: fix a buf size overflow issue during udmabuf creation Date: Mon, 14 Apr 2025 09:30:33 -0400 Message-Id: <20250414133048.680608-2-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250414133048.680608-1-sashal@kernel.org> References: <20250414133048.680608-1-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 6.1.134 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 ef99174d81ced..546bba502fbc1 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