[Qemu-commits] [qemu/qemu] 771b6e: virtio-net: fix unmap leak

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/qemu/qemu
  Commit: 771b6ed37e3aa188a7485560b949a41c6cf174dc
      
https://github.com/qemu/qemu/commit/771b6ed37e3aa188a7485560b949a41c6cf174dc
  Author: Jason Wang <address@hidden>
  Date:   2014-11-28 (Fri, 28 Nov 2014)

  Changed paths:
    M hw/net/virtio-net.c

  Log Message:
  -----------
  virtio-net: fix unmap leak

virtio_net_handle_ctrl() and other functions that process control vq
request call iov_discard_front() which will shorten the iov. This will
lead unmapping in virtqueue_push() leaks mapping.

Fixes this by keeping the original iov untouched and using a temp variable
in those functions.

Cc: Wen Congyang <address@hidden>
Cc: Stefano Stabellini <address@hidden>
Cc: address@hidden
Signed-off-by: Jason Wang <address@hidden>
Reviewed-by: Stefano Stabellini <address@hidden>
Reviewed-by: Fam Zheng <address@hidden>
Reviewed-by: Michael S. Tsirkin <address@hidden>
Message-id: address@hidden
Signed-off-by: Peter Maydell <address@hidden>