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* [PATCH v2 0/2] iter revert problems
@ 2021-08-12 20:40 Pavel Begunkov
  2021-08-12 20:40 ` [PATCH v2 1/2] iov_iter: mark truncated iters Pavel Begunkov
                   ` (3 more replies)
  0 siblings, 4 replies; 8+ messages in thread
From: Pavel Begunkov @ 2021-08-12 20:40 UTC (permalink / raw)
  To: Jens Axboe, io-uring, Alexander Viro, linux-fsdevel
  Cc: Palash Oswal, Sudip Mukherjee, linux-kernel,
	syzbot+9671693590ef5aad8953, asml.silence

For the bug description see 2/2. As mentioned there the current problems
is because of generic_write_checks(), but there was also a similar case
fixed in 5.12, which should have been triggerable by normal
write(2)/read(2) and others.

It may be better to enforce reexpands as a long term solution, but for
now this patchset is quickier and easier to backport.

v2: don't fail it has been justly fully reverted

Pavel Begunkov (2):
  iov_iter: mark truncated iters
  io_uring: don't retry with truncated iter

 fs/io_uring.c       | 16 ++++++++++++++++
 include/linux/uio.h |  5 ++++-
 2 files changed, 20 insertions(+), 1 deletion(-)

-- 
2.32.0


^ permalink raw reply	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2021-08-23 12:28 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-08-12 20:40 [PATCH v2 0/2] iter revert problems Pavel Begunkov
2021-08-12 20:40 ` [PATCH v2 1/2] iov_iter: mark truncated iters Pavel Begunkov
2021-08-12 20:40 ` [PATCH v2 2/2] io_uring: don't retry with truncated iter Pavel Begunkov
2021-08-16 15:35 ` [PATCH v2 0/2] iter revert problems Jens Axboe
2021-08-21 14:24 ` Pavel Begunkov
2021-08-21 22:25   ` Al Viro
2021-08-21 23:13     ` Jens Axboe
2021-08-23 12:28       ` David Laight

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