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net: vmxnet: use g_new for pkt initialisation 

When network transport abstraction layer initialises pkt, the maximum
fragmentation count is not checked. This could lead to an integer
overflow causing a NULL pointer dereference. Replace g_malloc() with
g_new() to catch the multiplication overflow.

Reported-by: Li Qiang <liqiang6-s@360.cn>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Acked-by: Dmitry Fleytman <dmitry@daynix.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
master
Li Qiang 2016-08-16 16:58:01 +05:30 committed by Jason Wang
parent 5f0e775348
commit 47882fa497
1 changed files with 2 additions and 3 deletions
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5
hw/net/net_tx_pkt.c
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@ -65,10 +65,9 @@ void net_tx_pkt_init(struct NetTxPkt **pkt, PCIDevice *pci_dev,
p->pci_dev = pci_dev;
p->vec = g_malloc((sizeof *p->vec) *
(max_frags + NET_TX_PKT_PL_START_FRAG));
p->vec = g_new(struct iovec, max_frags + NET_TX_PKT_PL_START_FRAG);
p->raw = g_malloc((sizeof *p->raw) * max_frags);
p->raw = g_new(struct iovec, max_frags);
p->max_payload_frags = max_frags;
p->max_raw_frags = max_frags;