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 D72631BD4E4; Wed, 19 Feb 2025 12:13:35 +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=1739967216; cv=none; b=idRTBhOupZUklHxxhh1pvv4lAreBtgqFjhm7p2tRnHL4B6EHgL61O766gIWFpUQKnn5I6HDxcSxydlEdacb55fB02Ot6WD/WKpLpapFgKN4uJutdf+SAxjVe71fmK9ciZYcqQzVpux/HimR25P/DiJs/s5tm8K5Cr0uKsj4x4TE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739967216; c=relaxed/simple; bh=VwZvAjw6hrQKHNmoh6jgmw70TBaConXEcu8BQE9Ymbs=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=BkbiNzRHXlNQMNSpHTpgvzAZVOiMoXPI5xV5403kfuN8EqBK4mRochLkW0luPo8nhqiSzPkjVXflpdKcVC2XESsJXjvqzc6RPky+CZtn5K/7DL3a1ThuDyB1Sba2TBZvrl2cTNf+hk25RVAnY0NFlmykXyD0SDmwrbETeSOg7KE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=sdwpvn88; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="sdwpvn88" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C37CFC4CED1; Wed, 19 Feb 2025 12:13:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1739967215; bh=VwZvAjw6hrQKHNmoh6jgmw70TBaConXEcu8BQE9Ymbs=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=sdwpvn88YqYn+PFnG/VmA6j5cmCZfbkJa0i5Cs+LZQt5dXQSGcZTxEL/0KeLMYYl/ UFxkcA4dBqGez51nO+VC+/fspD6+etar/FDZKN0IvjV/7KupJYA+oWu2Cbd7JK6JBs TDEWnQPHp2pGaXO3fkphVMRt0Bpql3vyOC8gjEig= Date: Wed, 19 Feb 2025 13:13:32 +0100 From: Greg Kroah-Hartman To: Naresh Kamboju Cc: stable@vger.kernel.org, patches@lists.linux.dev, linux-kernel@vger.kernel.org, torvalds@linux-foundation.org, akpm@linux-foundation.org, linux@roeck-us.net, shuah@kernel.org, patches@kernelci.org, lkft-triage@lists.linaro.org, pavel@denx.de, jonathanh@nvidia.com, f.fainelli@gmail.com, sudipm.mukherjee@gmail.com, srw@sladewatkins.net, rwarsow@gmx.de, conor@kernel.org, hargar@microsoft.com, broonie@kernel.org, Linux Crypto Mailing List , linux-fsdevel@vger.kernel.org, linux-mm , Anders Roxell , Dan Carpenter , Arnd Bergmann , Herbert Xu , willy@infradead.org, Pankaj Raghav , Yang Shi , Catalin Marinas , David Hildenbrand Subject: Re: [PATCH 6.6 000/389] 6.6.76-rc2 review Message-ID: <2025021901-silenced-phonebook-9b81@gregkh> References: <20250206155234.095034647@linuxfoundation.org> <2025021739-jackpot-lip-09f9@gregkh> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Wed, Feb 19, 2025 at 05:16:19PM +0530, Naresh Kamboju wrote: > On Mon, 17 Feb 2025 at 17:07, Greg Kroah-Hartman > wrote: > > > > On Mon, Feb 17, 2025 at 05:00:43PM +0530, Naresh Kamboju wrote: > > > On Sat, 8 Feb 2025 at 16:54, Naresh Kamboju wrote: > > > > > > > > On Thu, 6 Feb 2025 at 21:36, Greg Kroah-Hartman > > > > wrote: > > > > > > > > > > This is the start of the stable review cycle for the 6.6.76 release. > > > > > There are 389 patches in this series, all will be posted as a response > > > > > to this one. If anyone has any issues with these being applied, please > > > > > let me know. > > > > > > > > > > Responses should be made by Sat, 08 Feb 2025 15:51:12 +0000. > > > > > Anything received after that time might be too late. > > > > > > > > > > The whole patch series can be found in one patch at: > > > > > https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.6.76-rc2.gz > > > > > or in the git tree and branch at: > > > > > git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.6.y > > > > > and the diffstat can be found below. > > > > > > > > > > thanks, > > > > > > > > > > greg k-h > > > > > > > > > > > > There are three different regressions found and reporting here, > > > > We are working on bisecting and investigating these issues, > > > > > > We observed a kernel warning on QEMU-ARM64 and FVP while running the > > > newly added selftest: arm64: check_hugetlb_options. This issue appears > > > on 6.6.76 onward and 6.12.13 onward, as reported in the stable review [1]. > > > However, the test case passes successfully on stable 6.13. > > > > > > The selftests: arm64: check_hugetlb_options test was introduced following > > > the recent upgrade of kselftest test sources to the stable 6.13 branch. > > > As you are aware, LKFT runs the latest kselftest sources (from stable > > > 6.13.x) on 6.12.x, 6.6.x, and older kernels for validation purposes. > > > > > > >From Anders' bisection results, we identified that the missing patch on > > > 6.12 is likely causing this regression: > > > > > > First fixed commit: > > > [25c17c4b55def92a01e3eecc9c775a6ee25ca20f] > > > hugetlb: arm64: add MTE support > > > > > > Could you confirm whether this patch is eligible for backporting to > > > 6.12 and 6.6 kernels? > > > If backporting is not an option, we will need to skip running this > > > test case on older kernels. > > > > The test case itself should properly "skip" if the feature is not > > present in the kernel. Why not fix that up instead? > > The reported test gets PASS at the end, but generates kernel warning > while running the test case (always reproducible) on 6.12 and 6.6. > > The reported warning was not seen on stable 6.13. So this implies that userspace can cause a kernel warning? That means it can cause a DoS, that's not good at all. So the commit you mention actually fixes a bug then? Otherwise this feels really odd, as that means that any kernel without that change can crash this way. What changed to cause this to happen? thanks, greg k-h