Messages in this thread | | | Subject | Re: [PATCH] slub: Potential stack overflow | From | Eric Dumazet <> | Date | Wed, 24 Mar 2010 20:22:08 +0100 |
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Le mercredi 24 mars 2010 à 14:16 -0500, Christoph Lameter a écrit : > On Wed, 24 Mar 2010, Eric Dumazet wrote: > > > 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); > > Maybe we better allocate the bitmap via kmalloc then. >
Hmm...
Are we allowed to nest in these two functions ?
GFP_KERNEL, GFP_ATOMIC ?
These are debugging functions, what happens if kmalloc() returns NULL ?
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