[Qemu-devel] [PATCH] Fix crash due to incorrect pointer logic in slirp/ip_input.c

[Ed Swierk]

Another memory management bug in the slirp code causes qemu to crash
while attempting to reassemble a fragmented IP packet. While iterating
through a list of buffers, if m_cat() moves the current buffer, the
pointer to the next buffer is read from an invalid location.

The attached patch simply reads the next buffer pointer before calling
m_cat(). Incidentally, this is also the fix adopted in the BSD
networking stack, from which slirp was originally derived.

--Ed

qemu-slirp-reassembly-bug.patch
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