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rtl8139: switch to use qemu_receive_packet() for loopback

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This patch switches to use qemu_receive_packet() which can detect
reentrancy and return early.

This is intended to address CVE-2021-3416.

Cc: Prasad J Pandit <ppandit@redhat.com>
Cc: qemu-stable@nongnu.org
Buglink: https://bugs.launchpad.net/qemu/+bug/1910826
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com
Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Alexander Bulekov 2021-02-26 13:47:53 -05:00 committed by Jason Wang
parent 8c552542b8
commit 5311fb805a
1 changed files with 1 additions and 1 deletions
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2
hw/net/rtl8139.c
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@ -1795,7 +1795,7 @@ static void rtl8139_transfer_frame(RTL8139State *s, uint8_t *buf, int size,
}
DPRINTF("+++ transmit loopback mode\n");
rtl8139_do_receive(qemu_get_queue(s->nic), buf, size, do_interrupt);
qemu_receive_packet(qemu_get_queue(s->nic), buf, size);
if (iov) {
g_free(buf2);