net: avoid infinite loop when receiving packets(CVE-2015-5278)
Ne2000 NIC uses ring buffer of NE2000_MEM_SIZE(49152)
bytes to process network packets. While receiving packets
via ne2000_receive() routine, a local 'index' variable
could exceed the ring buffer size, leading to an infinite
loop situation.
Reported-by: Qinghao Tang <luodalongde@gmail.com>
Signed-off-by: P J P <pjp@fedoraproject.org>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
(cherry picked from commit 737d2b3c41
)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
stable-2.4
parent
7aa2bcad0c
commit
5a1ccdfe44
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@ -256,7 +256,7 @@ ssize_t ne2000_receive(NetClientState *nc, const uint8_t *buf, size_t size_)
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if (index <= s->stop)
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avail = s->stop - index;
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else
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avail = 0;
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break;
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len = size;
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if (len > avail)
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len = avail;
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