net: mvneta: fix refilling for Rx DMA buffers
With the actual code, if a memory allocation error happens while refilling a Rx descriptor, then the original Rx buffer is both passed to the networking stack (in a SKB) and let in the Rx ring. This leads to various kernel oops and crashes. As a fix, this patch moves Rx descriptor refilling ahead of building SKB with the associated Rx buffer. In case of a memory allocation failure, data is dropped and the original DMA buffer is put back into the Rx ring. Signed-off-by: NSimon Guinot <simon.guinot@sequanux.org> Fixes: c5aff182 ("net: mvneta: driver for Marvell Armada 370/XP network unit") Cc: <stable@vger.kernel.org> # v3.8+ Tested-by: NYoann Sculo <yoann@sculo.fr> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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