31 lines
1.2 KiB
Diff
31 lines
1.2 KiB
Diff
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References: bsc#964947 CVE-2015-5278
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Subject: net: avoid infinite loop when receiving packets(CVE-2015-5278)
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From: P J P pjp@fedoraproject.org Tue Sep 15 16:46:59 2015 +0530
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Date: Tue Sep 15 12:51:14 2015 +0100:
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Git: 737d2b3c41d59eb8f94ab7eb419b957938f24943
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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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Index: xen-4.6.0-testing/tools/qemu-xen-traditional-dir-remote/hw/ne2000.c
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===================================================================
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--- xen-4.6.0-testing.orig/tools/qemu-xen-traditional-dir-remote/hw/ne2000.c
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+++ xen-4.6.0-testing/tools/qemu-xen-traditional-dir-remote/hw/ne2000.c
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@@ -328,7 +328,7 @@ static void ne2000_receive(void *opaque,
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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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