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 B8DBE30E853; Fri, 12 Sep 2025 13:46:17 +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=1757684777; cv=none; b=PcPcl2by++iZ8xNKoHOVNGQMlgwOG/5pJZvGtt+T7gLmOtf2n+1sqp94Cw5h3tuyGMJZmgrsC+AyTvWzzCOL2mlI9c/858i/VMmEb0KQnGi0tJlY0xYoxu8PQgdiCRTBaIA2YA6TY+EWETpFoxiI5qPN0MgV08oOSQ0KqO5Nwl0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757684777; c=relaxed/simple; bh=rTdvXJrWf1/sP0O0JGJx/3Yq05P0d8MUTVIMGaUepwA=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=C3W7lY7PwRRfb3qoBxvrmv++fOFMDj0f7G4aMlQJHLZTj495hSrvAJThAnvlJ8b/1m79jRwAt3BnRar2/HDUE8QM/7FxOM0ctUZcXZ+l03eVRe4W1stV0CH4x4j7DHvPfUfNFpNhYP5nn++0t8B+ZugqiP6rU2ebmHoViyle9YU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Mydcm8A5; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Mydcm8A5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 10DADC4CEF1; Fri, 12 Sep 2025 13:46:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1757684777; bh=rTdvXJrWf1/sP0O0JGJx/3Yq05P0d8MUTVIMGaUepwA=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=Mydcm8A5pkOpw34pO6Kns6DY4twdOXIE+38U00xWGjgJTK0mBVWiSkCGyY9s8FlM/ xDmtU66VCo0ydJPhwMn3JgkHgQHYCUla2Rxi4kGDNXIibFbul+Gqjl8RIDhKVotcWS d7rsGKzk547WdQ2YC0ylDh7IWQMAc91lqa2hkSKhra/SWBPbRIVlsE2iYAURMdYzmv xPV8s093pckV7jasCCrN+GWtbabVSdA1KPVAV2qTyTFMZpnLXu11tZ1pHc8Irwlxzy 6GpJbmag+7hg4qzsxRxwGqyl6IMdtFdP1J4SJ7SvdXCwpoPRRNEYEHKs5jbYgyBrYK OjzMPRO3XCAvw== Message-ID: <52be6bdc-81cb-441d-8266-9fb5bb5b4b23@kernel.org> Date: Fri, 12 Sep 2025 09:46:16 -0400 Precedence: bulk X-Mailing-List: linux-nfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH v3] svcrdma: Introduce Receive buffer arenas To: Olga Kornievskaia Cc: linux-nfs@vger.kernel.org, linux-rdma@vger.kernel.org, Chuck Lever References: <20250821152254.8781-1-cel@kernel.org> Content-Language: en-US From: Chuck Lever Organization: kernel.org In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 9/11/25 5:33 PM, Olga Kornievskaia wrote: > When I have this patch it causes the following panic just from doing > "systemctl start nfs-server" followed by > "systemctl stop nfs-server" > > [ 69.705986] Unable to handle kernel paging request at virtual > address dfff800000000001 > [ 69.706706] KASAN: null-ptr-deref in range > [0x0000000000000008-0x000000000000000f] > [ 69.707299] Mem abort info: > [ 69.707514] ESR = 0x0000000096000005 > [ 69.707787] EC = 0x25: DABT (current EL), IL = 32 bits > [ 69.708186] SET = 0, FnV = 0 > [ 69.708415] EA = 0, S1PTW = 0 > [ 69.708637] FSC = 0x05: level 1 translation fault > [ 69.708986] Data abort info: > [ 69.709203] ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000 > [ 69.709604] CM = 0, WnR = 0, TnD = 0, TagAccess = 0 > [ 69.709986] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 > [ 69.710345] [dfff800000000001] address between user and kernel address ranges > [ 69.710842] Internal error: Oops: 0000000096000005 [#1] SMP Yep, I've hit this. I'm dropping the patch from nfsd-testing until the issue is addressed. Thanks for the report. -- Chuck Lever