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bh=J/+n1x0TPOHJCTfSVoXlG/q+OLrGnnNxrysZ0ZyIy+Y=; b=pHzOUc7BM55xFzzBztsrZQ6ygFPRvloHFAuFBaFsdoWepD4xjoyWgtGbYVkaUhbvfi P84rPFmotx3Wve/DjPG7H9LcGZ+Lz35FmLGO4jWFwIh0Z/zaFYxpWJuG4mASAxSwPdXe IFtyuNxp+YKkLrWPeXiztEJrKguVl0K/F9K4JaYye1Me6SGgrBcV5fFW9AUvbaTHOmGM L0VfzEJlTXkQ5B4hVUBG1V0xxQPohpSmXskawjrtiujQr4FvMgerduRDmHxk7TTLNQtU cD42SplXK5LxNFSXUcBKqxlr0Yr0ORpy14E28p6PEh/mqaGusv5/yoXXH7mnpWM90TQs 55vw== X-Gm-Message-State: AOAM533GF2Vx6cndYGhlXhSGCEsxs9yzCyU1sEzE2N1+5WFhIW6cAte/ 97psRnGcKsEQtUfd66wLZCdgZtcU0DCpDpRarngy5A== X-Google-Smtp-Source: ABdhPJyAci+5cM2zXs7C2dh5O8VDIKXSp+LVa6rVM/MPlgy6tZLvyXi43c6iWM9w5BW9l3CIsdr5O5Od75OK4rN9ByQ= X-Received: by 2002:aa7:d9ce:: with SMTP id v14mr12828586eds.203.1603752924617; Mon, 26 Oct 2020 15:55:24 -0700 (PDT) MIME-Version: 1.0 From: Kyle Huey Date: Mon, 26 Oct 2020 15:55:13 -0700 Message-ID: Subject: [REGRESSION] mm: process_vm_readv testcase no longer works after compat_prcoess_vm_readv removed To: open list , Christoph Hellwig Cc: "Robert O'Callahan" , Alexander Viro , Andrew Morton , Jens Axboe , Arnd Bergmann , David Howells , "moderated list:ARM PORT" , "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" , linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, "open list:FILESYSTEMS (VFS and infrastructure)" , linux-aio@kvack.org, io-uring@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, keyrings@vger.kernel.org, linux-security-module@vger.kernel.org, Linus Torvalds Content-Type: text/plain; charset="UTF-8" X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: A test program from the rr[0] test suite, vm_readv_writev[1], no longer works on 5.10-rc1 when compiled as a 32 bit binary and executed on a 64 bit kernel. The first process_vm_readv call (on line 35) now fails with EFAULT. I have bisected this to c3973b401ef2b0b8005f8074a10e96e3ea093823. It should be fairly straightforward to extract the test case from our repository into a standalone program. - Kyle [0] https://rr-project.org/ [1] https://github.com/mozilla/rr/blob/master/src/test/vm_readv_writev.c