From patchwork Wed Apr 30 20:52:50 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Sridhar, Kanchana P" X-Patchwork-Id: 886170 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.15]) (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 8A1D82C0318; Wed, 30 Apr 2025 20:53:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.15 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746046393; cv=none; b=urPpGuD4dwAtDO5Ih+jbLjAxiO1ZqE9J3mgtopEfsj5vcfK/rrigS6fvwCpC3/v5OmzqSfWm3uYHvpeJeK1rQR/T92u97+5aXFo5MRv+bupLaKX/Ec0W7YOUVU7/CmurUGfAz7ZV0XUeNOxhVb9YHsXdDrclruKzvGQu2li8q5Y= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746046393; c=relaxed/simple; bh=sJFxWyA6AJF6CcAZ5xFoncDGNwqA2S5ppE8eb6ZDAWI=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=ZLXmgUXhMGfL6mwooeUaB1O8P/lCCffpA/sGF01m5CRq0N3kplSZJPqwqZeoIaCH2RP9MNaDPWPz/SJ6cC+wi1xo6x8g++qUhRjzkr6Djd2UUE60351sE6XzW49JZR0VqkWy9ZsXp8u5+vkWsXZ5h35mPl8WYvTKrisLwfrL3ZA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=m07ncGk3; arc=none smtp.client-ip=198.175.65.15 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="m07ncGk3" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1746046392; x=1777582392; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=sJFxWyA6AJF6CcAZ5xFoncDGNwqA2S5ppE8eb6ZDAWI=; b=m07ncGk3GQpdyH5eT+7TGnscRa+7IRzCrz61DqYjDoPZo0RiLxhjTmT4 4I0dKxeXAVFJoLBPh0MrdaqM0r9421XwcmowjOqgmvWz+erkKAcFfxgXq 9ngf6yqfPo5ZO7vsc/AR5nBF6GJ7qnBaJV8yCt/BbtXVvq056DTW05O/b Ub0jVreOHvIG4pDl5ahGJ4UFZm8e9CJax+q5VuX1TxGvXUQUgnHP8tIXC R5WC9eZ8ofOUoJ+9+F9WZf/ErjjH+4jAI2wlqCuxeOSFHjiiHAKtrnYcj 6/e6keh/E4nh57oRmvg5WvBv4ATPZcVp37CRw025Dcle6eyspnZPGTIji A==; X-CSE-ConnectionGUID: yiGbkz7xQZqYtSr6ZAgk3A== X-CSE-MsgGUID: fPD4v95gSEadNRuqxXm5Eg== X-IronPort-AV: E=McAfee;i="6700,10204,11419"; a="51388521" X-IronPort-AV: E=Sophos;i="6.15,252,1739865600"; d="scan'208";a="51388521" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by orvoesa107.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Apr 2025 13:53:10 -0700 X-CSE-ConnectionGUID: ZSZ9KhmCRJyz09lh3q5fnw== X-CSE-MsgGUID: 1GdV5HP6StWduSbWaC2+gQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.15,252,1739865600"; d="scan'208";a="138248886" Received: from jf5300-b11a338t.jf.intel.com ([10.242.51.115]) by fmviesa003.fm.intel.com with ESMTP; 30 Apr 2025 13:53:09 -0700 From: Kanchana P Sridhar To: linux-kernel@vger.kernel.org, linux-mm@kvack.org, hannes@cmpxchg.org, yosry.ahmed@linux.dev, nphamcs@gmail.com, chengming.zhou@linux.dev, usamaarif642@gmail.com, ryan.roberts@arm.com, 21cnbao@gmail.com, ying.huang@linux.alibaba.com, akpm@linux-foundation.org, linux-crypto@vger.kernel.org, herbert@gondor.apana.org.au, davem@davemloft.net, clabbe@baylibre.com, ardb@kernel.org, ebiggers@google.com, surenb@google.com, kristen.c.accardi@intel.com Cc: wajdi.k.feghali@intel.com, vinodh.gopal@intel.com, kanchana.p.sridhar@intel.com Subject: [PATCH v9 04/19] crypto: scomp - Fix off-by-one bug when calculating last page Date: Wed, 30 Apr 2025 13:52:50 -0700 Message-Id: <20250430205305.22844-5-kanchana.p.sridhar@intel.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20250430205305.22844-1-kanchana.p.sridhar@intel.com> References: <20250430205305.22844-1-kanchana.p.sridhar@intel.com> Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Fix off-by-one bug in the last page calculation for src and dst. Reported-by: Nhat Pham Fixes: 2d3553ecb4e3 ("crypto: scomp - Remove support for some non-trivial SG lists") Signed-off-by: Herbert Xu --- crypto/scompress.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/crypto/scompress.c b/crypto/scompress.c index c1ce12564299..1ed52b9740c5 100644 --- a/crypto/scompress.c +++ b/crypto/scompress.c @@ -215,8 +215,8 @@ static int scomp_acomp_comp_decomp(struct acomp_req *req, int dir) spage = nth_page(spage, soff / PAGE_SIZE); soff = offset_in_page(soff); - n = slen / PAGE_SIZE; - n += (offset_in_page(slen) + soff - 1) / PAGE_SIZE; + n = (slen - 1) / PAGE_SIZE; + n += (offset_in_page(slen - 1) + soff) / PAGE_SIZE; if (PageHighMem(nth_page(spage, n)) && size_add(soff, slen) > PAGE_SIZE) break; @@ -243,9 +243,9 @@ static int scomp_acomp_comp_decomp(struct acomp_req *req, int dir) dpage = nth_page(dpage, doff / PAGE_SIZE); doff = offset_in_page(doff); - n = dlen / PAGE_SIZE; - n += (offset_in_page(dlen) + doff - 1) / PAGE_SIZE; - if (PageHighMem(dpage + n) && + n = (dlen - 1) / PAGE_SIZE; + n += (offset_in_page(dlen - 1) + doff) / PAGE_SIZE; + if (PageHighMem(nth_page(dpage, n)) && size_add(doff, dlen) > PAGE_SIZE) break; dst = kmap_local_page(dpage) + doff;