[v2,0/3] floppy: suppress UBSAN warning in setup_rw_floppy()

Message

Denis Efremov (Oracle) April 26, 2020, 1:07 p.m. UTC

These patches are based on Willy's cleanup patches
https://lkml.org/lkml/2020/3/31/609.

The first two patches indroduce defines to make it more clear why
cmd_count in struct floppy_raw_cmd allows out-of-bounds access for
cmd, reply_count, reply fields. The last one handles the warning.

Changes in v2:
 - add FD_RAW_CMD_FULLSIZE to the second patch
 - add union with fullcmd to struct floppy_raw_cmd in the last patch

Denis Efremov (3):
  floppy: add FD_AUTODETECT_SIZE define for struct floppy_drive_params
  floppy: add defines for sizes of cmd & reply buffers of floppy_raw_cmd
  floppy: suppress UBSAN warning in setup_rw_floppy()

 drivers/block/floppy.c  | 34 +++++++++++++---------------------
 include/uapi/linux/fd.h | 26 ++++++++++++++++++++++----
 2 files changed, 35 insertions(+), 25 deletions(-)