tree 7f0eadba6ca9d0cc19b26dc82ec61bc8df4c9fe2
parent 7acc7c683a747689aaaaad4fce1683fc3f85e552
author Johannes Berg <johannes.berg@intel.com> 1284676705 +0200
committer John W. Linville <linville@tuxdriver.com> 1285004500 -0400

wext: fix potential private ioctl memory content leak

When a driver doesn't fill the entire buffer, old
heap contents may remain, and if it also doesn't
update the length properly, this old heap content
will be copied back to userspace.

It is very unlikely that this happens in any of
the drivers using private ioctls since it would
show up as junk being reported by iwpriv, but it
seems better to be safe here, so use kzalloc.

Reported-by: Jeff Mahoney <jeffm@suse.com>
Cc: stable@kernel.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>