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([2a02:810d:15c0:828:233a:5c18:b527:381e]) by smtp.gmail.com with ESMTPSA id k26-20020a1709062a5a00b009331450d04esm5514550eje.178.2023.04.03.22.29.48 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 03 Apr 2023 22:29:48 -0700 (PDT) Message-ID: <50fa11f1-35bf-fa93-bc96-d1e0a05abc0f@linaro.org> Date: Tue, 4 Apr 2023 07:29:47 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.9.0 Subject: Re: Regression: NULL pointer dereference after NFS_V4_2_READ_PLUS (commit 7fd461c47) To: Olga Kornievskaia Cc: Trond Myklebust , Anna Schumaker , linux-nfs , Linux Kernel Mailing List , "regressions@lists.linux.dev" References: <82526863-d07a-0a5d-2990-1555b1387f26@linaro.org> <2C5E9725-F152-4D2E-882E-CF92A35481BF@hammerspace.com> <7ba38377-7992-7f0f-d905-cceb42510f39@linaro.org> <51430925-8046-7066-84ed-2ff0db835347@linaro.org> <2add1769-1458-b185-bc78-6d573f61b6fc@linaro.org> <32530c36-91d0-d351-0689-aed6a0975a4b@linaro.org> <2f285607-cbf9-6abc-f436-edb6e9a3938b@linaro.org> <4fe39d77-eb7c-a578-aefa-45b76e2247c2@linaro.org> Content-Language: en-US From: Krzysztof Kozlowski In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 04/04/2023 03:01, Olga Kornievskaia wrote: > On Mon, Mar 6, 2023 at 12:12 PM Anna Schumaker wrote: >> >> Hi Krzysztof, >> >> On Tue, Feb 14, 2023 at 6:02 AM Krzysztof Kozlowski >> wrote: >>> >>> On 12/02/2023 15:05, Anna Schumaker wrote: >>>>>> From ac2d6c501dbcdb306480edaee625b5496f1fb4f5 Mon Sep 17 00:00:00 2001 >>>>>> From: Anna Schumaker >>>>>> Date: Fri, 10 Feb 2023 15:50:22 -0500 >>>>>> Subject: [PATCH] NFSv4.2: Rework scratch handling for READ_PLUS >>>>>> >>>>> >>>>> Patch is corrupted - maybe mail program reformatted it when sending: >>>>> >>>>> Applying: NFSv4.2: Rework scratch handling for READ_PLUS >>>>> error: corrupt patch at line 12 >>>>> Patch failed at 0001 NFSv4.2: Rework scratch handling for READ_PLUS >>>> >>>> That's weird. I wasn't expecting gmail to reformat the patch but I >>>> guess it did. I've added it as an attachment so that shouldn't happen >>>> again. >>> >>> Still null ptr (built on 420b2d4 with your patch): >> >> We're through the merge window and at rc1 now, so I can spend more >> time scratching my head over your bug again. We've come up with a >> patch (attached) that adds a bunch of printks to show us what the >> kernel thinks is going on. Do you mind trying it out and letting us >> know what gets printed out? You'll need to make sure >> CONFIG_NFS_V4_2_READ_PLUS is enabled when compiling the kernel. > > Hi Krzystof, > > Since you are the only one hitting the problem, could you be so kind > as to help with getting this resolved. > My setup is not special. It is regular ARMv7 board using a regular ARMv8 NFS server. Anyway my farm is since some time offline due to relocation and will be online in June, so I cannot test anything. Best regards, Krzysztof