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From: Prasad J Pandit <pjp@fedoraproject.org>
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Date: Thu, 31 Dec 2015 17:05:27 +0530
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Subject: [PATCH] net: ne2000: fix bounds check in ioport operations
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While doing ioport r/w operations, ne2000 device emulation suffers
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from OOB r/w errors. Update respective array bounds check to avoid
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OOB access.
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Reported-by: Ling Liu <liuling-it@360.cn>
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Cc: qemu-stable@nongnu.org
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Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
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Signed-off-by: Jason Wang <jasowang@redhat.com>
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(cherry picked from commit aa7f9966dfdff500bbbf1956d9e115b1fa8987a6)
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---
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hw/net/ne2000.c | 10 ++++++----
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1 file changed, 6 insertions(+), 4 deletions(-)
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diff --git a/hw/net/ne2000.c b/hw/net/ne2000.c
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index 2bdb4c9..364f226 100644
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--- a/hw/net/ne2000.c
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+++ b/hw/net/ne2000.c
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@@ -476,8 +476,9 @@ static inline void ne2000_mem_writel(NE2000State *s, uint32_t addr,
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uint32_t val)
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{
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addr &= ~1; /* XXX: check exact behaviour if not even */
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- if (addr < 32 ||
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- (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) {
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+ if (addr < 32
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+ || (addr >= NE2000_PMEM_START
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+ && addr + sizeof(uint32_t) <= NE2000_MEM_SIZE)) {
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stl_le_p(s->mem + addr, val);
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}
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}
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@@ -506,8 +507,9 @@ static inline uint32_t ne2000_mem_readw(NE2000State *s, uint32_t addr)
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static inline uint32_t ne2000_mem_readl(NE2000State *s, uint32_t addr)
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{
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addr &= ~1; /* XXX: check exact behaviour if not even */
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- if (addr < 32 ||
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- (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) {
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+ if (addr < 32
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+ || (addr >= NE2000_PMEM_START
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+ && addr + sizeof(uint32_t) <= NE2000_MEM_SIZE)) {
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return ldl_le_p(s->mem + addr);
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} else {
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return 0xffffffff;
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