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libata: if T_LENGTH is zero, dma direction should be DMA_NONE
commit 5da5231 upstream. Avoid data corruption by rejecting pass-through commands where T_LENGTH is zero (No data is transferred) and the dma direction is not DMA_NONE. Cc: <stable@vger.kernel.org> Reported-by: syzkaller<syzkaller@googlegroups.com> Signed-off-by: George Kennedy<george.kennedy@oracle.com> Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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