tree 9b16ed244e0bd0b71a1d3d6e662be310f1e8f9c2
parent e40152ee1e1c7a63f4777791863215e3faa37a86
author Eric Dumazet <eric.dumazet@gmail.com> 1269465947 +0100
committer Pekka Enberg <penberg@cs.helsinki.fi> 1274515050 +0300

slub: Potential stack overflow

I discovered that we can overflow stack if CONFIG_SLUB_DEBUG=y and use slabs
with many objects, since list_slab_objects() and process_slab() use
DECLARE_BITMAP(map, page->objects).

With 65535 bits, we use 8192 bytes of stack ...

Switch these allocations to dynamic allocations.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>