From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1DF49C433E0 for ; Thu, 21 May 2020 14:23:22 +0000 (UTC) Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C78B62072C for ; Thu, 21 May 2020 14:23:21 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="L7MaZOPD" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C78B62072C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by fraxinus.osuosl.org (Postfix) with ESMTP id 97C4786E5C; Thu, 21 May 2020 14:23:21 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from fraxinus.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id GhTHKf5DYZSS; Thu, 21 May 2020 14:23:21 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by fraxinus.osuosl.org (Postfix) with ESMTP id 3AB0D86F01; Thu, 21 May 2020 14:23:21 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 1501BC088B; Thu, 21 May 2020 14:23:21 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) by lists.linuxfoundation.org (Postfix) with ESMTP id B20D7C0176 for ; Thu, 21 May 2020 11:30:37 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id 92F3B89343 for ; Thu, 21 May 2020 11:30:37 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id aR5rKBF01oCf for ; Thu, 21 May 2020 11:30:36 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from mail27.static.mailgun.info (mail27.static.mailgun.info [104.130.122.27]) by hemlock.osuosl.org (Postfix) with ESMTPS id 9D4DA89332 for ; Thu, 21 May 2020 11:30:33 +0000 (UTC) DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1590060635; h=Content-Transfer-Encoding: MIME-Version: Message-Id: Date: Subject: Cc: To: From: Sender; bh=lhRGU6l23pWyhwgP/bWEorni345nvViGnvyOWBGS/6U=; b=L7MaZOPD4+SViCPUNE6UiHDHIxcjSDkculN+TZ1og4rDVKXhz2RgCM/5DRbWTH1DSycm5L/j gpL8heH/vO5Kdv6d8PhicB7n2QucoDBNMgHYiF6B2YO7jFhZbC4Kh4QY4FB1vkN99GooCIIZ +b+dSGSE4rqMjXLabQgp/87U5I4= X-Mailgun-Sending-Ip: 104.130.122.27 X-Mailgun-Sid: WyI3NDkwMCIsICJpb21tdUBsaXN0cy5saW51eC1mb3VuZGF0aW9uLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by mxa.mailgun.org with ESMTP id 5ec66649.7f67d8db4fb8-smtp-out-n04; Thu, 21 May 2020 11:30:17 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 68682C433CB; Thu, 21 May 2020 11:30:17 +0000 (UTC) Received: from guptap1-linux.qualcomm.com (blr-c-bdr-fw-01_GlobalNAT_AllZones-Outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: guptap) by smtp.codeaurora.org (Postfix) with ESMTPSA id 58119C433C6; Thu, 21 May 2020 11:30:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 58119C433C6 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=guptap@codeaurora.org From: Prakash Gupta To: akpm@linux-foundation.org, mhocko@suse.com, joro@8bytes.org Subject: [PATCH] iommu/dma: limit iova free size to unmmaped iova Date: Thu, 21 May 2020 17:00:04 +0530 Message-Id: <20200521113004.12438-1-guptap@codeaurora.org> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 X-Mailman-Approved-At: Thu, 21 May 2020 14:23:20 +0000 Cc: linux-mm@kvack.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Prakash Gupta X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Limit the iova size while freeing based on unmapped size. In absence of this even with unmap failure, invalid iova is pushed to iova rcache and subsequently can cause panic while rcache magazine is freed. Signed-off-by: Prakash Gupta :100644 100644 4959f5df21bd 098f7d377e04 M drivers/iommu/dma-iommu.c diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 4959f5df21bd..098f7d377e04 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -472,7 +472,8 @@ static void __iommu_dma_unmap(struct device *dev, dma_addr_t dma_addr, if (!cookie->fq_domain) iommu_tlb_sync(domain, &iotlb_gather); - iommu_dma_free_iova(cookie, dma_addr, size); + if (unmapped) + iommu_dma_free_iova(cookie, dma_addr, unmapped); } static dma_addr_t __iommu_dma_map(struct device *dev, phys_addr_t phys, -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, hosted by The Linux Foundation _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu