packages/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

hw: ehci: check return value of 'usb_packet_map'

Browse Source 
If 'usb_packet_map' fails, we should stop to process the usb
request.

Signed-off-by: Li Qiang <liq3ea@163.com>
Message-Id: <20200812161727.29412-1-liq3ea@163.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
(cherry-picked from 2fdb42d8)
Fix CVE-2020-25723
Signed-off-by: Alex Chen <alex.chen@huawei.com>
This commit is contained in:
Huawei Technologies Co., Ltd 2020-08-12 09:17:27 -07:00 committed by Euler Robot
parent 94ee2e703d
commit baf7742ed7
1 changed files with 49 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
hw-ehci-check-return-value-of-usb_packet_map.patch Normal file
View File

@ -0,0 +1,49 @@
From 02d63f9fd9655f1899dabbccaf0568bfaa3e97df Mon Sep 17 00:00:00 2001
From: Li Qiang <liq3ea@163.com>
Date: Wed, 12 Aug 2020 09:17:27 -0700
Subject: [PATCH] hw: ehci: check return value of 'usb_packet_map'
If 'usb_packet_map' fails, we should stop to process the usb
request.
Signed-off-by: Li Qiang <liq3ea@163.com>
Message-Id: <20200812161727.29412-1-liq3ea@163.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
(cherry-picked from 2fdb42d8)
Fix CVE-2020-25723
Signed-off-by: Alex Chen <alex.chen@huawei.com>
---
hw/usb/hcd-ehci.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/hw/usb/hcd-ehci.c b/hw/usb/hcd-ehci.c
index 5f089f3005..433e6a4fc0 100644
--- a/hw/usb/hcd-ehci.c
+++ b/hw/usb/hcd-ehci.c
@@ -1370,7 +1370,10 @@ static int ehci_execute(EHCIPacket *p, const char *action)
spd = (p->pid == USB_TOKEN_IN && NLPTR_TBIT(p->qtd.altnext) == 0);
usb_packet_setup(&p->packet, p->pid, ep, 0, p->qtdaddr, spd,
(p->qtd.token & QTD_TOKEN_IOC) != 0);
- usb_packet_map(&p->packet, &p->sgl);
+ if (usb_packet_map(&p->packet, &p->sgl)) {
+ qemu_sglist_destroy(&p->sgl);
+ return -1;
+ }
p->async = EHCI_ASYNC_INITIALIZED;
}
@@ -1449,7 +1452,10 @@ static int ehci_process_itd(EHCIState *ehci,
if (ep && ep->type == USB_ENDPOINT_XFER_ISOC) {
usb_packet_setup(&ehci->ipacket, pid, ep, 0, addr, false,
(itd->transact[i] & ITD_XACT_IOC) != 0);
- usb_packet_map(&ehci->ipacket, &ehci->isgl);
+ if (usb_packet_map(&ehci->ipacket, &ehci->isgl)) {
+ qemu_sglist_destroy(&ehci->isgl);
+ return -1;
+ }
usb_handle_packet(dev, &ehci->ipacket);
usb_packet_unmap(&ehci->ipacket, &ehci->isgl);
} else {
--
2.27.0