linux-kernel - [PATCH 0/2] Revert "block: add single bio async direct IO helper" to avoid UAF

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Date:   Tue,  7 Dec 2021 10:51:40 -0500
From:   George Kennedy <george.kennedy@...cle.com>
To:     gregkh@...uxfoundation.org, axboe@...nel.dk, asml.silence@...il.com
Cc:     george.kennedy@...cle.com, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 0/2] Revert "block: add single bio async direct IO helper" to avoid UAF

git bisect shows that commit 54a88eb838d3
("block: add single bio async direct IO helper")
causes the following UAF: KASAN: use-after-free Write in io_submit_one

Tried to root-cause the issue, but need the patch submitter's help in
coming up with a fix.

Needed to revert commit 1bb6b8102945
("block: avoid extra iter advance with async iocb")
in order to be able to revert 54a88eb838d37af930c9f19e1930a4fba6789cb5.

George Kennedy (2):
  Revert "block: avoid extra iter advance with async iocb"
  Revert "block: add single bio async direct IO helper"

 block/bio.c         |  2 +-
 block/fops.c        | 96 ++---------------------------------------------------
 include/linux/bio.h |  1 -
 3 files changed, 4 insertions(+), 95 deletions(-)

-- 
1.8.3.1