SLUB: Fix merged slab cache names
As explained by Linus "I'm Proud to be an American" Torvalds: Looking at the merging code, I actually think it's totally buggy. If you have something like this: - load module A: create slab cache A - load module B: create slab cache B that can merge with A - unload module A - "cat /proc/slabinfo": BOOM. Oops. exactly because the name is not handled correctly, and you'll have module B holding open a slab cache that has a name pointer that points to module A that no longer exists. This patch fixes the problem by using kstrdup() to allocate dynamic memory for ->name of "struct kmem_cache" as suggested by Christoph Lameter. Acked-by: Christoph Lameter <cl@linux.com> Cc: David Rientjes <rientjes@google.com> Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Pekka Enberg <penberg@kernel.org> Conflicts: mm/slub.c
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