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* [REGRESSION] mm: process_vm_readv testcase no longer works after compat_prcoess_vm_readv removed
@ 2020-10-26 22:55 Kyle Huey
  2020-10-26 23:56 ` Jens Axboe
  0 siblings, 1 reply; 4+ messages in thread
From: Kyle Huey @ 2020-10-26 22:55 UTC (permalink / raw)
  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,
	linux-parisc, linuxppc-dev, linux-s390, sparclinux, linux-block,
	linux-scsi, open list:FILESYSTEMS (VFS and infrastructure),
	linux-aio, io-uring, linux-arch, linux-mm, netdev, keyrings,
	linux-security-module, Linus Torvalds

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

^ permalink raw reply	[flat|nested] 4+ messages in thread

end of thread, other threads:[~2020-10-27  0:34 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
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2020-10-26 22:55 [REGRESSION] mm: process_vm_readv testcase no longer works after compat_prcoess_vm_readv removed Kyle Huey
2020-10-26 23:56 ` Jens Axboe
2020-10-27  0:05   ` Al Viro
2020-10-27  0:09     ` Jens Axboe

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