On Tue, Jun 14, 2022 at 02:17:26AM -0300, Leonardo Bras wrote:
> Somewhere between v6 and v7 the of the zero-copy-send patchset a crucial
> part of the flushing mechanism got missing: incrementing zero_copy_queued.
>
> Without that, the flushing interface becomes a no-op, and there is no
> guarantee the buffer is really sent.
>
> This can go as bad as causing a corruption in RAM during migration.
>
> Fixes: 2bc58ffc2926 ("QIOChannelSocket: Implement io_writev zero copy flag &
> io_flush for CONFIG_LINUX")
> Reported-by: 徐闯 <[email protected]>
> Signed-off-by: Leonardo Bras <[email protected]>
> ---
> io/channel-socket.c | 5 +++++
> 1 file changed, 5 insertions(+)
Reviewed-by: Daniel P. Berrangé <[email protected]>
With regards,
Daniel
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