tree 0e8f9966e42128fea6a49436055570f8575d34a9
parent fa7ccfb17033bfb5bca86f6b909cab0b807efbc0
author Dan Rosenberg <drosenberg@vsecurity.com> 1308919085 -0400
committer Gustavo F. Padovan <padovan@profusion.mobi> 1309283875 -0300

Bluetooth: Prevent buffer overflow in l2cap config request

A remote user can provide a small value for the command size field in
the command header of an l2cap configuration request, resulting in an
integer underflow when subtracting the size of the configuration request
header.  This results in copying a very large amount of data via
memcpy() and destroying the kernel heap.  Check for underflow.

Signed-off-by: Dan Rosenberg <drosenberg@vsecurity.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>