33 lines
1.1 KiB
Diff
33 lines
1.1 KiB
Diff
From: P J P <pjp@fedoraproject.org>
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Date: Tue, 15 Sep 2015 16:46:59 +0530
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Subject: [PATCH] net: avoid infinite loop when receiving
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packets(CVE-2015-5278)
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Ne2000 NIC uses ring buffer of NE2000_MEM_SIZE(49152)
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bytes to process network packets. While receiving packets
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via ne2000_receive() routine, a local 'index' variable
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could exceed the ring buffer size, leading to an infinite
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loop situation.
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Reported-by: Qinghao Tang <luodalongde@gmail.com>
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Signed-off-by: P J P <pjp@fedoraproject.org>
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Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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(cherry picked from commit 737d2b3c41d59eb8f94ab7eb419b957938f24943)
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---
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hw/net/ne2000.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/hw/net/ne2000.c b/hw/net/ne2000.c
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index 3492db3..44a4264 100644
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--- a/hw/net/ne2000.c
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+++ b/hw/net/ne2000.c
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@@ -253,7 +253,7 @@ 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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