[Bug 1904954] Re: lan9118 bug peeked received message size not equal to actual received message size

[Peter Maydell]

This patchset should fix this bug:
20210108180401.2263-1-peter.maydell@linaro.org/">https://patchew.org/QEMU/20210108180401.2263-1-peter.maydell@linaro.org/

PS: this isn't a security issue because the lan9118 is used only on
board models that can't run under KVM and so it is not on QEMU's
security boundary.

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https://bugs.launchpad.net/bugs/1904954

Title:
  lan9118 bug peeked received message size not equal to actual received
  message size

Status in QEMU:
  New

Bug description:
  peeked message size is not equal to read message size

  Bug in the code at line:
  https://github.com/qemu/qemu/blob/master/hw/net/lan9118.c#L1209

  s->tx_status_fifo_head should be s->rx_status_fifo_head

  Could also be a security bug, as the user could allocate a buffer of
  size peeked data smaller than the actual packet received, which could
  cause a buffer overflow.

  Thanks,

  Alfred

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