tree f55f7b9af2c8debe05bbb48a82a16bc5dedb7f38
parent bcf85df2695665ba00dc546660f34dd1078354d4
author Dylan Yudaken <dylany@fb.com> 1645527302 -0800
committer Greg Kroah-Hartman <gregkh@google.com> 1677693106 +0000

UPSTREAM: io_uring: update kiocb->ki_pos at execution time

commit d34e1e5b396a0dbaa4a29b7138df662cfb9d8e8e upstream.

Update kiocb->ki_pos at execution time rather than in io_prep_rw().
io_prep_rw() happens before the job is enqueued to a worker and so the
offset might be read multiple times before being executed once.

Ensures that the file position in a set of _linked_ SQEs will be only
obtained after earlier SQEs have completed, and so will include their
incremented file position.

Change-Id: I3c5abbf6a337ec1958fd6600c5feb44fb61a5772
Signed-off-by: Dylan Yudaken <dylany@fb.com>
Reviewed-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Bug: 268174392
(cherry picked from commit ea528ecac3ae58d8197871b29748eefca7d46be8)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>