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[24.9.64.241]) by smtp.gmail.com with ESMTPSA id l1sm2867638ilc.65.2021.09.10.10.43.29 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 10 Sep 2021 10:43:29 -0700 (PDT) Subject: Re: After KUnit update for Linux 5.15-rc1 - unable to share VFAT filesystem via samba To: Arthur Marsh Cc: linux-kernel@vger.kernel.org, brendanhiggins@google.com, linux-kselftest@vger.kernel.org, Shuah Khan References: <6A72EAE4-A0F7-4CD2-89BB-36A8F4A7D321@internode.on.net> From: Shuah Khan Message-ID: Date: Fri, 10 Sep 2021 11:43:28 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: <6A72EAE4-A0F7-4CD2-89BB-36A8F4A7D321@internode.on.net> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Arthur, On 9/10/21 5:57 AM, Arthur Marsh wrote: > > Hi, I have been sharing an old VFAT formatted hard disk on one pc to > another using Samba and sometime after kernel 5.14.0 it stopped working (apparently no longer being shared as the mount.smbfs command > on the client failed with error -13 yet mount.smbfs still worked for > ext3 filesytems shared from the same machine which had the VFAT > filesystem). > The only error I saw on the machine with the VFAT formatted hard disk > was the output of the mount command had truncated the name of the > mount to only include the first 4 characters of the base name of the > mount point. > e.g. when VFAT filesystem was mounted on /mnt/victoria, the output of > the mount command showed the filesytem mounted on /mnt/vict > This could be path name related to the second bad commit in your bisect. > The kernel build used was i386 with gcc 11.2.0-4 using > > make - j2 menuconfig bindeb-pkg > > .config available on request. > Can you send your config and dmesg? This will help determine if KUNIT is enabled - it shouldn't be. > The git-bisect was: > victoria:/usr/src/linux# git bisect loggit bisect start '--' 'fs/fat'# > good: [7d2a07b769330c34b4deabeed939325c77a7ec2f] Linux 5.14git bisect > good 7d2a07b769330c34b4deabeed939325c77a7ec2f# bad: > [a3fa7a101dcff93791d1b1bdb3affcad1410c8c1] Merge branches 'akpm' and > 'akpm-hotfixes' (patches from Andrew)git bisect bad > a3fa7a101dcff93791d1b1bdb3affcad1410c8c1# good: > [edb0872f44ec9976ea6d052cb4b93cd2d23ac2ba] block: move the bdi from > the request_queue to the gendiskgit bisect good > edb0872f44ec9976ea6d052cb4b93cd2d23ac2ba# good: > [b0d4adaf3b3c4402d9c3b6186e02aa1e4f7985cd] fat: Add KUnit tests for > checksums and timestampsgit bisect good > b0d4adaf3b3c4402d9c3b6186e02aa1e4f7985cd# bad: This one is a KUnit patch Subject: [PATCH] fat: Add KUnit tests for checksums and timestamps > [c815f04ba94940fbc303a6ea9669e7da87f8e77d] Merge tag > 'linux-kselftest-kunit-5.15-rc1' of > git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftestgit > bisect bad c815f04ba94940fbc303a6ea9669e7da87f8e77d# first bad commit: > [c815f04ba94940fbc303a6ea9669e7da87f8e77d] Merge tag Subject: [PATCH] d_path: make 'prepend()' fill up the buffer exactly on overflow > 'linux-kselftest-kunit-5.15-rc1' of > git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest > thanks, -- Shuah