linux-hardening - [PATCH 0/8] scsi: aacraid: Replace one-element arrays with flexible-array members

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Date:   Tue, 22 Feb 2022 01:28:12 -0600
From:   "Gustavo A. R. Silva" <gustavoars@...nel.org>
To:     linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Adaptec OEM Raid Solutions <aacraid@...rosemi.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        linux-hardening@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>
Subject: [PATCH 0/8] scsi: aacraid: Replace one-element arrays with
 flexible-array members

This series aims to replace one-element arrays with flexible-array
members in multiple structures in drivers/scsi/aacraid/aacraid.h.

There is a regular need in the kernel to provide a way to declare having
a dynamically sized set of trailing elements in a structure. Kernel code
should always use “flexible array members”[1] for these cases. The older
style of one-element or zero-length arrays should no longer be used[2].

This helps with the ongoing efforts to globally enable -Warray-bounds
and get us closer to being able to tighten the FORTIFY_SOURCE routines
on memcpy().

These issues were found with the help of Coccinelle and audited and fixed,
manually.

[1] https://en.wikipedia.org/wiki/Flexible_array_member
[2] https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays

Link: https://github.com/KSPP/linux/issues/79

Gustavo A. R. Silva (8):
  scsi: aacraid: Replace one-element array with flexible-array member
  scsi: aacraid: Replace one-element array with flexible-array member in
    struct sgmap
  scsi: aacraid: Replace one-element array with flexible-array member in
    struct user_sgmap
  scsi: aacraid: Replace one-element array with flexible-array member in
    struct sgmap64
  scsi: aacraid: Replace one-element array with flexible-array member in
    struct user_sgmap64
  scsi: aacraid: Replace one-element array with flexible-array member in
    struct sgmapraw
  scsi: aacraid: Replace one-element array with flexible-array member in
    struct user_sgmapraw
  scsi: aacraid: Replace one-element array with flexible-array member in
    struct aac_aifcmd

 drivers/scsi/aacraid/aachba.c   | 76 +++++++++++----------------------
 drivers/scsi/aacraid/aacraid.h  | 16 +++----
 drivers/scsi/aacraid/commctrl.c |  5 +--
 drivers/scsi/aacraid/comminit.c |  3 +-
 4 files changed, 37 insertions(+), 63 deletions(-)

-- 
2.27.0