From: Kyle Huey <me@kylehuey.com>
To: open list <linux-kernel@vger.kernel.org>, Christoph Hellwig <hch@lst.de>
Cc: "Robert O'Callahan" <robert@ocallahan.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Andrew Morton <akpm@linux-foundation.org>,
Jens Axboe <axboe@kernel.dk>, Arnd Bergmann <arnd@arndb.de>,
David Howells <dhowells@redhat.com>,
"moderated list:ARM PORT" <linux-arm-kernel@lists.infradead.org>,
"maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)"
<x86@kernel.org>,
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-fsdevel@vger.kernel.org>,
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 <torvalds@linux-foundation.org>
Subject: [REGRESSION] mm: process_vm_readv testcase no longer works after compat_prcoess_vm_readv removed
Date: Mon, 26 Oct 2020 15:55:13 -0700 [thread overview]
Message-ID: <CAP045Aqrsb=CXHDHx4nS-pgg+MUDj14r-kN8_Jcbn-NAUziVag@mail.gmail.com> (raw)
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
next reply other threads:[~2020-10-26 22:55 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-26 22:55 Kyle Huey [this message]
2020-10-26 23:56 ` [REGRESSION] mm: process_vm_readv testcase no longer works after compat_prcoess_vm_readv removed Jens Axboe
2020-10-27 0:05 ` Al Viro
2020-10-27 0:09 ` Jens Axboe
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