[PATCH 0/3] dm: simplify list ioctls

[David Laight <david.laight.linux@gmail.com>]

Scanning for poossibly unbounded strlen() found the device/disk
manager ioctls that do a double scan of the data to check whether
the caller supplied buffer is large enough, and then to fill it.

If the buffer is too small the required size isn't returned.

So simplify everything and make it all less likely to overrun
the kernel buffer (copied back to user later) if anything changes
between the scans.

I managed a minimal test that the ioctls still work.

David Laight (3):
  dm: __list_versions(): Only process targets once
  dm: list_devices(): Only process devices once
  dm: lookup_ioctl(): Use designated array initialers

 drivers/md/dm-ioctl.c | 207 +++++++++++++++++++-----------------------
 1 file changed, 92 insertions(+), 115 deletions(-)

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2.39.5