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![John W. Linville](/assets/img/avatar_default.png)
In e1000_free_desc_rings, zero-out pointers after the memory they point to is freed. The test rings are static and get re-used, and failures during subsequent test setups can cause e1000_free_desc_rings to get called with dirty pointers. Dirty pointers can cause oopses or crashes... Signed-off-by: John W. Linville <linville@tuxdriver.com>