wil6210: Sanity check for reported DMA length
If Rx descriptor contains garbage, it is possible to access memory beyond allocated buffer. Check this condition and drop Rx if reported length is unreasonable large Signed-off-by: NVladimir Kondratiev <qca_vkondrat@qca.qualcomm.com> Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
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