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Fixed integer overflow in e1000e 

Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1737400
Fixed setting max_queue_num if there are no peers in
NICConf. qemu_new_nic() creates NICState with 1 NetClientState(index
0) without peers, set max_queue_num to 0 - It prevents undefined
behavior and possible crashes, especially during pcie hotplug.

Fixes: 6f3fbe4ed0 ("net: Introduce e1000e device emulation")
Signed-off-by: Andrew Melnychenko <andrew@daynix.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Dmitry Fleytman <dmitry.fleytman@gmail.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
master
Andrew Melnychenko 2020-03-04 16:20:58 +02:00 committed by Jason Wang
parent a43790f2f6
commit f22a57ac09
1 changed files with 1 additions and 1 deletions
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2
hw/net/e1000e.c
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@ -328,7 +328,7 @@ e1000e_init_net_peer(E1000EState *s, PCIDevice *pci_dev, uint8_t *macaddr)
s->nic = qemu_new_nic(&net_e1000e_info, &s->conf,
object_get_typename(OBJECT(s)), dev->id, s);
s->core.max_queue_num = s->conf.peers.queues - 1;
s->core.max_queue_num = s->conf.peers.queues ? s->conf.peers.queues - 1 : 0;
trace_e1000e_mac_set_permanent(MAC_ARG(macaddr));
memcpy(s->core.permanent_mac, macaddr, sizeof(s->core.permanent_mac));