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[209.132.180.67]) by mx.google.com with ESMTP id a54si9523794edc.333.2019.10.01.09.51.57; Tue, 01 Oct 2019 09:52:21 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b="uCi/zPA3"; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729694AbfJAQGE (ORCPT + 99 others); Tue, 1 Oct 2019 12:06:04 -0400 Received: from mail.kernel.org ([198.145.29.99]:40252 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726327AbfJAQGD (ORCPT ); Tue, 1 Oct 2019 12:06:03 -0400 Received: from localhost (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1F12F2133F; Tue, 1 Oct 2019 16:06:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569945962; bh=viFORMoHYlBKltHccmiUPBbIQT2qPwJiFLuYDJ9RYV8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=uCi/zPA34gykz3giHeAXKfNiK+GAE+llviRRM/TR33ENpTcX2YcStrK9s8fPEBeeU 7tdU3nNIJ8lBVZeMfxaCH1rBUhWGIpYzBQzL0HS63v7UMEeo40YPnOgxBAyESxqGJh 0pbrgcp2h5i2q4wmuVUXGGgxGWql/tTc8ejB+rsg= Date: Tue, 1 Oct 2019 12:06:01 -0400 From: Sasha Levin To: Greg KH Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org, Austin Kim , Dimitri Sivanich , Hedi Berriche , Linus Torvalds , Mike Travis , Peter Zijlstra , Russ Anderson , Steve Wahl , Thomas Gleixner , allison@lohutok.net, andy@infradead.org, armijn@tjaldur.nl, bp@alien8.de, dvhart@infradead.org, hpa@zytor.com, kjlu@umn.edu, platform-driver-x86@vger.kernel.org, Ingo Molnar Subject: Re: [PATCH AUTOSEL 5.3 169/203] x86/platform/uv: Fix kmalloc() NULL check routine Message-ID: <20191001160601.GX8171@sasha-vm> References: <20190922184350.30563-1-sashal@kernel.org> <20190922184350.30563-169-sashal@kernel.org> <20190922202544.GA2719513@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: <20190922202544.GA2719513@kroah.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Sep 22, 2019 at 10:25:44PM +0200, Greg KH wrote: >On Sun, Sep 22, 2019 at 02:43:15PM -0400, Sasha Levin wrote: >> From: Austin Kim >> >> [ Upstream commit 864b23f0169d5bff677e8443a7a90dfd6b090afc ] >> >> The result of kmalloc() should have been checked ahead of below statement: >> >> pqp = (struct bau_pq_entry *)vp; >> >> Move BUG_ON(!vp) before above statement. >> >> Signed-off-by: Austin Kim >> Cc: Dimitri Sivanich >> Cc: Hedi Berriche >> Cc: Linus Torvalds >> Cc: Mike Travis >> Cc: Peter Zijlstra >> Cc: Russ Anderson >> Cc: Steve Wahl >> Cc: Thomas Gleixner >> Cc: allison@lohutok.net >> Cc: andy@infradead.org >> Cc: armijn@tjaldur.nl >> Cc: bp@alien8.de >> Cc: dvhart@infradead.org >> Cc: gregkh@linuxfoundation.org >> Cc: hpa@zytor.com >> Cc: kjlu@umn.edu >> Cc: platform-driver-x86@vger.kernel.org >> Link: https://lkml.kernel.org/r/20190905232951.GA28779@LGEARND20B15 >> Signed-off-by: Ingo Molnar >> Signed-off-by: Sasha Levin >> --- >> arch/x86/platform/uv/tlb_uv.c | 4 ++-- >> 1 file changed, 2 insertions(+), 2 deletions(-) >> >> diff --git a/arch/x86/platform/uv/tlb_uv.c b/arch/x86/platform/uv/tlb_uv.c >> index 20c389a91b803..5f0a96bf27a1f 100644 >> --- a/arch/x86/platform/uv/tlb_uv.c >> +++ b/arch/x86/platform/uv/tlb_uv.c >> @@ -1804,9 +1804,9 @@ static void pq_init(int node, int pnode) >> >> plsize = (DEST_Q_SIZE + 1) * sizeof(struct bau_pq_entry); >> vp = kmalloc_node(plsize, GFP_KERNEL, node); >> - pqp = (struct bau_pq_entry *)vp; >> - BUG_ON(!pqp); >> + BUG_ON(!vp); >> >> + pqp = (struct bau_pq_entry *)vp; >> cp = (char *)pqp + 31; >> pqp = (struct bau_pq_entry *)(((unsigned long)cp >> 5) << 5); >> > >How did this even get merged in the first place? I thought a number of >us complained about it. > >This isn't any change in code, and the original is just fine, the author >didn't realize how C works :( > >Please drop this. Heh, I've dropped it. -- Thanks, Sasha