[v3] Detect reentrant RX casued by loopback

[PATCH V3 07/10] rtl8139: switch to use qemu_receive_packet() for loopback

Posted by Jason Wang 4 years, 11 months ago

From: Alexander Bulekov <alxndr@bu.edu>

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

Buglink: https://bugs.launchpad.net/qemu/+bug/1910826
Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
---
 hw/net/rtl8139.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/net/rtl8139.c b/hw/net/rtl8139.c
index 4675ac878e..90b4fc63ce 100644
--- a/hw/net/rtl8139.c
+++ b/hw/net/rtl8139.c
@@ -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);
-- 
2.24.3 (Apple Git-128)

Re: [PATCH V3 07/10] rtl8139: switch to use qemu_receive_packet() for loopback

Posted by Philippe Mathieu-Daudé 4 years, 11 months ago

On 3/2/21 6:54 AM, Jason Wang wrote:
> From: Alexander Bulekov <alxndr@bu.edu>
> 
> This patch switches to use qemu_receive_packet() which can detect
> reentrancy and return early.
> 
> Buglink: https://bugs.launchpad.net/qemu/+bug/1910826
> Signed-off-by: Alexander Bulekov <alxndr@bu.edu>

Missing your S-o-b?

> ---
>  hw/net/rtl8139.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>