From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from stravinsky.debian.org (stravinsky.debian.org [82.195.75.108]) (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 43F5915AF6; Mon, 5 May 2025 16:02:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=82.195.75.108 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746460977; cv=none; b=DqrSUSzsYBRnHP+Izpbq5OUFnU+xQVCY6m9fh8AvKG7C/OFZkOwmKSLFN/YGT0kaAH/e4+cRD1fhr5MIN9wgMedhrg3sWW0okPylSmveOZUzU6Mkiy4kgZZsv0Nl2CKtut/ksARrBP/CgGR+sNImX3/BHO5E44sHsI71GBJ09O0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746460977; c=relaxed/simple; bh=SGQ85kR/Wu8LXeCpvn4jaojGos2dxjuusa3HPfu9zjo=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=tBeySHTonN8xoMe6XIe48DLayoEwG/Dpww4XFk4cMkVi1RDZxbshylGO6lT9ERtliOGi/FhyjoBJKqcdve8avwKKvqSWlIyI+aY00HFc6ZwgVs0HaR3mlXyawsnVRjnLqsXh2nbPZCxciXqmLfEWfJjBCrEYExxeDxhrux8JoxE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=debian.org; spf=none smtp.mailfrom=debian.org; dkim=pass (2048-bit key) header.d=debian.org header.i=@debian.org header.b=u+m3Xjz7; arc=none smtp.client-ip=82.195.75.108 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=debian.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=debian.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=debian.org header.i=@debian.org header.b="u+m3Xjz7" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=debian.org; s=smtpauto.stravinsky; h=X-Debian-User:In-Reply-To:Content-Transfer-Encoding: Content-Type:MIME-Version:References:Message-ID:Subject:Cc:To:From:Date: Reply-To:Content-ID:Content-Description; bh=b0WW3d9I9jUVZTy7eDrM32r61wBGMgqX3tU0kL+chbA=; b=u+m3Xjz7BnOyt94vWcKjIobtow nGhnBEmWj0tpRuyq3tcj7c7CFHTGJasYGSpmP2+WM1na5tPYzrdHNML7aUPEVwIQFgzuI2VWz2oMc 8AAkpBw/ABwZMYkYo6yTeVrQ/ydlvYgLMYcML8EgTBmhkn5GWO9x7XmC4PuXmch5mgMoGmaNDisrg Dntp+tdDnQsRwmRsKu4vT7MlC0HPIZFJE5e/XeEduUr44jlSc1MV3hYkID4aOGxv7hI7kiEvz3KOW kfsFzfbQ1F9D8blZ3EYDbLUpWyHUXNkanvzN5nL/ONfp+uU+zCTQOKiUiCE6PVGoC6McgOejeR4Rl napsIZXQ==; Received: from authenticated user by stravinsky.debian.org with esmtpsa (TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.94.2) (envelope-from ) id 1uByH8-003uHO-Ps; Mon, 05 May 2025 16:02:39 +0000 Received: by eldamar.lan (Postfix, from userid 1000) id B71E6BE2DE0; Mon, 05 May 2025 18:02:37 +0200 (CEST) Date: Mon, 5 May 2025 18:02:37 +0200 From: Salvatore Bonaccorso To: Moritz =?iso-8859-1?Q?M=FChlenhoff?= , Yu Kuai Cc: Melvin Vermeeren , Greg Kroah-Hartman , 1104460@bugs.debian.org, Coly Li , Sasha Levin , stable , regressions@lists.linux.dev Subject: Re: [regression 6.1.y] discard/TRIM through RAID10 blocking (was: Re: Bug#1104460: linux-image-6.1.0-34-powerpc64le: Discard broken) with RAID10: BUG: kernel tried to execute user page (0) - exploit attempt? Message-ID: References: <174602441004.174814.6400502946223473449.reportbug@talos.vermwa.re> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-Debian-User: carnil On Mon, May 05, 2025 at 04:00:31PM +0200, Salvatore Bonaccorso wrote: > Hi Moritz, > > On Mon, May 05, 2025 at 01:47:15PM +0200, Moritz Mühlenhoff wrote: > > Am Wed, Apr 30, 2025 at 05:55:20PM +0200 schrieb Salvatore Bonaccorso: > > > Hi > > > > > > We got a regression report in Debian after the update from 6.1.133 to > > > 6.1.135. Melvin is reporting that discard/trimm trhough a RAID10 array > > > stalls idefintively. The full report is inlined below and originates > > > from https://bugs.debian.org/1104460 . > > > > JFTR, we ran into the same problem with a few Wikimedia servers running > > 6.1.135 and RAID 10: The servers started to lock up once fstrim.service > > got started. Full oops messages are available at > > https://phabricator.wikimedia.org/P75746 > > Thanks for this aditional datapoints. Assuming you wont be able to > thest the other stable series where the commit d05af90d6218 > ("md/raid10: fix missing discard IO accounting") went in, might you at > least be able to test the 6.1.y branch with the commit reverted again > and manually trigger the issue? > > If needed I can provide a test Debian package of 6.1.135 (or 6.1.137) > with the patch reverted. So one additional data point as several Debian users were reporting back beeing affected: One user did upgrade to 6.12.25 (where the commit was backported as well) and is not able to reproduce the issue there. This indicates we might miss some pre-requisites in the 6.1.y series? user is trying now the 6.1.135 with patch reverted as well. Regards, Salvatore