linux-kernel - [PATCH v2 0/2] nvme: compat ioctl fixes

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Date:   Sat, 28 Mar 2020 01:09:07 -0400
From:   Nick Bowler <nbowler@...conx.ca>
To:     linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Sagi Grimberg <sagi@...mberg.me>,
        Christoph Hellwig <hch@...radead.org>,
        Keith Busch <kbusch@...nel.org>
Subject: [PATCH v2 0/2] nvme: compat ioctl fixes

On review of my earlier patch to correct how 32-bit addresses in the
NVME_IOCTL_ADMIN_CMD compat ioctl (via nvme_user_cmd function) were
handled, similar problems were noted in the nvme_user_cmd64 function.

Additionally, NVME_IOCTL_SUBMIT_IO is busted in the compat case because
it not only has the same 32-bit address problem, but additionally the
corresponding nvme_user_io structure padding differs between 32-bit and
64-bit x86 (and some other arches presumably have the same problem).

Note that since I do not know of any users of the NVME_IOCTL_IO64_CMD
or NVME_IOCTL_ADMIN64_CMD ioctls, I have not tested the changes to the
nvme_user_cmd64 function (but these changes are virtually identical
to those done in the other functions function).

Nick Bowler (2):
  nvme: Fix compat NVME_IOCTL_SUBMIT_IO numbering
  nvme: Fix compat address handling in several ioctls

 drivers/nvme/host/core.c        | 47 ++++++++++++++++++++++++---------
 include/uapi/linux/nvme_ioctl.h | 25 ++++++++++++++++++
 2 files changed, 59 insertions(+), 13 deletions(-)

-- 
2.24.1