Commit 44d7175d authored by Sergey Senozhatsky's avatar Sergey Senozhatsky Committed by Linus Torvalds
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mm/dmapool: allow NULL `pool' pointer in dma_pool_destroy()

dma_pool_destroy() does not tolerate a NULL dma_pool pointer argument and
performs a NULL-pointer dereference.  This requires additional attention
and effort from developers/reviewers and forces all dma_pool_destroy()
callers to do a NULL check

    if (pool)

Or, otherwise, be invalid dma_pool_destroy() users.

Tweak dma_pool_destroy() and NULL-check the pointer there.

Proposed by Andrew Morton.


Signed-off-by: default avatarSergey Senozhatsky <>
Acked-by: default avatarDavid Rientjes <>
Cc: Julia Lawall <>
Cc: Joe Perches <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent 4e3ca3e0
......@@ -271,6 +271,9 @@ void dma_pool_destroy(struct dma_pool *pool)
bool empty = false;
if (unlikely(!pool))
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