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Shin'ichiro Kawasaki 5f0266044d scsi: mpi3mr: Avoid memcpy field-spanning write WARNING 
[ Upstream commit 429846b4b6 ]

When the "storcli2 show" command is executed for eHBA-9600, mpi3mr driver
prints this WARNING message:

  memcpy: detected field-spanning write (size 128) of single field "bsg_reply_buf->reply_buf" at drivers/scsi/mpi3mr/mpi3mr_app.c:1658 (size 1)
  WARNING: CPU: 0 PID: 12760 at drivers/scsi/mpi3mr/mpi3mr_app.c:1658 mpi3mr_bsg_request+0x6b12/0x7f10 [mpi3mr]

The cause of the WARN is 128 bytes memcpy to the 1 byte size array "__u8
replay_buf[1]" in the struct mpi3mr_bsg_in_reply_buf. The array is intended
to be a flexible length array, so the WARN is a false positive.

To suppress the WARN, remove the constant number '1' from the array
declaration and clarify that it has flexible length. Also, adjust the
memory allocation size to match the change.

Suggested-by: Sathya Prakash Veerichetty <sathya.prakash@broadcom.com>
Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Link: https://lore.kernel.org/r/20240323084155.166835-1-shinichiro.kawasaki@wdc.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-05-17 11:56:04 +02:00
..
asm-generic open: return EINVAL for O_DIRECTORY | O_CREAT 2023-05-24 17:32:34 +01:00
drm drm/virtio: exbuf->fence_fd unmodified on interrupted wait 2023-02-14 19:11:45 +01:00
linux PCI/DPC: Use FIELD_GET() 2024-04-27 17:07:11 +02:00
misc This update includes the following changes: 2022-10-10 13:04:25 -07:00
mtd This pull request contains updates for UBI and UBIFS 2022-10-14 18:23:23 -07:00
rdma RDMA/irdma: Allow accurate reporting on QP max send/recv WR 2024-03-26 18:20:53 -04:00
scsi scsi: mpi3mr: Avoid memcpy field-spanning write WARNING 2024-05-17 11:56:04 +02:00
sound ASoC: Intel: Skylake: Fix declaration of enum skl_ch_cfg 2023-05-30 14:03:32 +01:00
video License cleanup: add SPDX license identifier to uapi header files with a license 2017-11-02 11:20:11 +01:00
xen Improve docs for IOCTL_GNTDEV_MAP_GRANT_REF 2022-02-03 08:23:32 +01:00
Kbuild kbuild: re-implement Makefile.headersinst without recursion 2019-06-15 19:57:02 +09:00