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sungem: switch to use qemu_receive_packet() for loopback

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Fix CVE-2021-3416

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
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>

Signed-off-by: Jiajie Li <lijiajie11@huawei.com>
This commit is contained in:
Chen Qun 2021-05-14 10:30:23 +08:00
parent 39989f83ee
commit eaeac4ebc8
1 changed files with 43 additions and 0 deletions
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sungem-switch-to-use-qemu_receive_packet-for-loopbac.patch Normal file
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@ -0,0 +1,43 @@
From e36764a070b9caccf2ac7502f4656a81e2283823 Mon Sep 17 00:00:00 2001
From: Jason Wang <jasowang@redhat.com>
Date: Fri, 14 May 2021 10:30:23 +0800
Subject: [PATCH] sungem: switch to use qemu_receive_packet() for loopback
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Fix CVE-2021-3416
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
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Jiajie Li <lijiajie11@huawei.com>
---
hw/net/sungem.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/hw/net/sungem.c b/hw/net/sungem.c
index 89bcf749d1..37b62f62b8 100644
--- a/hw/net/sungem.c
+++ b/hw/net/sungem.c
@@ -303,7 +303,7 @@ static void sungem_send_packet(SunGEMState *s, const uint8_t *buf,
NetClientState *nc = qemu_get_queue(s->nic);
if (s->macregs[MAC_XIFCFG >> 2] & MAC_XIFCFG_LBCK) {
- nc->info->receive(nc, buf, size);
+ qemu_receive_packet(nc, buf, size);
} else {
qemu_send_packet(nc, buf, size);
}
--
2.27.0