Xuan Zhuo d5c0ed17fe
virtio: packed: fix unmap leak for indirect desc table ...
When use_dma_api and premapped are true, then the do_unmap is false.
Because the do_unmap is false, vring_unmap_extra_packed is not called by
detach_buf_packed.
if (unlikely(vq->do_unmap)) {
curr = id;
for (i = 0; i < state->num; i++) {
vring_unmap_extra_packed(vq,
&vq->packed.desc_extra[curr]);
curr = vq->packed.desc_extra[curr].next;
}
}
So the indirect desc table is not unmapped. This causes the unmap leak.
So here, we check vq->use_dma_api instead. Synchronously, dma info is
updated based on use_dma_api judgment
This bug does not occur, because no driver use the premapped with
indirect.
Fixes: b319940f83xuanzhuo@linux.alibaba.com >
Message-Id: <20240223071833.26095-1-xuanzhuo@linux.alibaba.com >
Signed-off-by: Michael S. Tsirkin <mst@redhat.com >
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