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[Bug 1904954] Re: lan9118 bug peeked received message size not equal to
From: |
Peter Maydell |
Subject: |
[Bug 1904954] Re: lan9118 bug peeked received message size not equal to actual received message size |
Date: |
Fri, 08 Jan 2021 18:08:21 -0000 |
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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