virtio_net: fix PAGE_SIZE > 64k

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[ Upstream commit d0fa28f000 ]

I don't have any guests with PAGE_SIZE > 64k but the
code seems to be clearly broken in that case
as PAGE_SIZE / MERGEABLE_BUFFER_ALIGN will need
more than 8 bit and so the code in mergeable_ctx_to_buf_address
does not give us the actual true size.

Cc: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Michael S. Tsirkin 2017-01-23 21:37:52 +02:00 • committed by Greg Kroah-Hartman

parent a6c3e01bf3

commit 7fdc81f6e1

1 changed files with 9 additions and 1 deletions

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drivers/net/virtio_net.c

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