35 lines
1.1 KiB
Diff
35 lines
1.1 KiB
Diff
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References: bsc#969351 CVE-2016-2841
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From: Prasad J Pandit <address@hidden>
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Ne2000 NIC uses ring buffer of NE2000_MEM_SIZE(49152)
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bytes to process network packets. Registers PSTART & PSTOP
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define ring buffer size & location. Setting these registers
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to invalid values could lead to infinite loop or OOB r/w
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access issues. Add check to avoid it.
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Reported-by: Yang Hongke <address@hidden>
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Signed-off-by: Prasad J Pandit <address@hidden>
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---
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hw/net/ne2000.c | 4 ++++
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1 file changed, 4 insertions(+)
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Update per review:
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-> https://lists.gnu.org/archive/html/qemu-devel/2016-02/msg05522.html
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Index: xen-4.6.1-testing/tools/qemu-xen-traditional-dir-remote/hw/ne2000.c
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===================================================================
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--- xen-4.6.1-testing.orig/tools/qemu-xen-traditional-dir-remote/hw/ne2000.c
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+++ xen-4.6.1-testing/tools/qemu-xen-traditional-dir-remote/hw/ne2000.c
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@@ -202,6 +202,10 @@ static int ne2000_buffer_full(NE2000Stat
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{
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int avail, index, boundary;
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+ if (s->stop <= s->start) {
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+ return 1;
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+ }
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+
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index = s->curpag << 8;
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boundary = s->boundary << 8;
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if (index < boundary)
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