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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 57596C2BA19 for ; Sat, 11 Apr 2020 23:24:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1EAAF20769 for ; Sat, 11 Apr 2020 23:24:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586647446; bh=Cs9Qe4kNc/+4SFavUbccjPjRjBI5sOfSRGradyFox30=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Xq/ZPWkYgYn0p8xM7GWYi40lOL6XOrjFLFPtAXv3ed833IFutsc6t+PYY2Q9JTsBm d8CYvfo4b3b/6ULemVqMn+1ayxXad7RMjKWYloh2/PxlcQPBWbgBD7p7RSBiHN/idU qwjbnSz4CT7XSaAukFT5QnyjICaLvX6TjbUjdRDI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730383AbgDKXYE (ORCPT ); Sat, 11 Apr 2020 19:24:04 -0400 Received: from mail.kernel.org ([198.145.29.99]:52972 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729802AbgDKXMk (ORCPT ); Sat, 11 Apr 2020 19:12:40 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 52F3B20757; Sat, 11 Apr 2020 23:12:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586646761; bh=Cs9Qe4kNc/+4SFavUbccjPjRjBI5sOfSRGradyFox30=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=slnFYFjx1IyxGNHtdmO+u3MaT7plRoKnQKq/jCCwboSbtmru2Y6+TpBsEqtV091Ge /OFJbehrgerUsmOkMUAVbnsyZlx2iMzowV3eegWYRfrO3EgmysqhVaqL81iB+tW12n NR9x97E/pBZEe6/upZHqxk1V7zIRJXBg3Cai93Sw= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Ayush Sawal , Herbert Xu , Sasha Levin , linux-crypto@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 31/66] crypto: chelsio - This fixes the kernel panic which occurs during a libkcapi test Date: Sat, 11 Apr 2020 19:11:28 -0400 Message-Id: <20200411231203.25933-31-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200411231203.25933-1-sashal@kernel.org> References: <20200411231203.25933-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ayush Sawal [ Upstream commit 9195189e00a7db55e7d448cee973cae87c5a3c71 ] The libkcapi test which causes kernel panic is aead asynchronous vmsplice multiple test. ./bin/kcapi -v -d 4 -x 10 -c "ccm(aes)" -q 4edb58e8d5eb6bc711c43a6f3693daebde2e5524f1b55297abb29f003236e43d -t a7877c99 -n 674742abd0f5ba -k 2861fd0253705d7875c95ba8a53171b4 -a fb7bc304a3909e66e2e0c5ef952712dd884ce3e7324171369f2c5db1adc48c7d This patch avoids dma_mapping of a zero length sg which causes the panic, by using sg_nents_for_len which maps only upto a specific length Signed-off-by: Ayush Sawal Signed-off-by: Herbert Xu Signed-off-by: Sasha Levin --- drivers/crypto/chelsio/chcr_algo.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/crypto/chelsio/chcr_algo.c b/drivers/crypto/chelsio/chcr_algo.c index 8b68ccc137c53..796206faabec9 100644 --- a/drivers/crypto/chelsio/chcr_algo.c +++ b/drivers/crypto/chelsio/chcr_algo.c @@ -2418,8 +2418,9 @@ int chcr_aead_dma_map(struct device *dev, else reqctx->b0_dma = 0; if (req->src == req->dst) { - error = dma_map_sg(dev, req->src, sg_nents(req->src), - DMA_BIDIRECTIONAL); + error = dma_map_sg(dev, req->src, + sg_nents_for_len(req->src, dst_size), + DMA_BIDIRECTIONAL); if (!error) goto err; } else { -- 2.20.1