tree 49c4d36e9f3929df1f561033722cbf72c65fee96
parent ab067e99d22ec78ff646de1283348729d1aa66d4
author Thomas Jarosch <thomas.jarosch@intra2net.com> 1318862890 +0200
committer Pekka Enberg <penberg@kernel.org> 1318957079 +0300

tools, slub: Fix off-by-one buffer corruption after readlink() call

readlink() never zero terminates the provided buffer.
Therefore we already do

    buffer[count] = 0;

This leads to an off-by-one buffer corruption as readlink()
might return the full size of the buffer.

The common technique is to reduce the buffer size by one.
Another fix would be to check

  if (count < 0 || count == sizeof(buffer))
      fatal();

Reducing the buffer size by one is easier IMHO.

Signed-off-by: Thomas Jarosch <thomas.jarosch@intra2net.com>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Christoph Lameter <cl@gentwo.org>
Signed-off-by: Pekka Enberg <penberg@kernel.org>