From: Gerd Hoffmann <kraxel@redhat.com>
To: qemu-devel@nongnu.org
Cc: "Marc-André Lureau" <marcandre.lureau@redhat.com>,
"Gerd Hoffmann" <kraxel@redhat.com>
Subject: [Qemu-devel] [PULL 1/5] usbredir: fix buffer-overflow on vmload
Date: Thu, 22 Aug 2019 08:52:38 +0200 [thread overview]
Message-ID: <20190822065242.12496-2-kraxel@redhat.com> (raw)
In-Reply-To: <20190822065242.12496-1-kraxel@redhat.com>
From: Marc-André Lureau <marcandre.lureau@redhat.com>
If interface_count is NO_INTERFACE_INFO, let's not access the arrays
out-of-bounds.
==994==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x625000243930 at pc 0x5642068086a8 bp 0x7f0b6f9ffa50 sp 0x7f0b6f9ffa40
READ of size 1 at 0x625000243930 thread T0
#0 0x5642068086a7 in usbredir_check_bulk_receiving /home/elmarco/src/qemu/hw/usb/redirect.c:1503
#1 0x56420681301c in usbredir_post_load /home/elmarco/src/qemu/hw/usb/redirect.c:2154
#2 0x5642068a56c2 in vmstate_load_state /home/elmarco/src/qemu/migration/vmstate.c:168
#3 0x56420688e2ac in vmstate_load /home/elmarco/src/qemu/migration/savevm.c:829
#4 0x5642068980cb in qemu_loadvm_section_start_full /home/elmarco/src/qemu/migration/savevm.c:2211
#5 0x564206899645 in qemu_loadvm_state_main /home/elmarco/src/qemu/migration/savevm.c:2395
#6 0x5642068998cf in qemu_loadvm_state /home/elmarco/src/qemu/migration/savevm.c:2467
#7 0x56420685f3e9 in process_incoming_migration_co /home/elmarco/src/qemu/migration/migration.c:449
#8 0x564207106c47 in coroutine_trampoline /home/elmarco/src/qemu/util/coroutine-ucontext.c:115
#9 0x7f0c0604e37f (/lib64/libc.so.6+0x4d37f)
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Liam Merwick <liam.merwick@oracle.com>
Reviewed-by: Li Qiang <liq3ea@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20190807084048.4258-1-marcandre.lureau@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
hw/usb/redirect.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/hw/usb/redirect.c b/hw/usb/redirect.c
index fc9fe0c00f4c..be15b9f30334 100644
--- a/hw/usb/redirect.c
+++ b/hw/usb/redirect.c
@@ -1499,6 +1499,11 @@ static void usbredir_check_bulk_receiving(USBRedirDevice *dev)
for (i = EP2I(USB_DIR_IN); i < MAX_ENDPOINTS; i++) {
dev->endpoint[i].bulk_receiving_enabled = 0;
}
+
+ if (dev->interface_info.interface_count == NO_INTERFACE_INFO) {
+ return;
+ }
+
for (i = 0; i < dev->interface_info.interface_count; i++) {
quirks = usb_get_quirks(dev->device_info.vendor_id,
dev->device_info.product_id,
--
2.18.1
next prev parent reply other threads:[~2019-08-22 6:54 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-22 6:52 [Qemu-devel] [PULL 0/5] Usb 20190822 patches Gerd Hoffmann
2019-08-22 6:52 ` Gerd Hoffmann [this message]
2019-08-22 6:52 ` [Qemu-devel] [PULL 2/5] usb-redir: merge interrupt packets Gerd Hoffmann
2019-08-22 6:52 ` [Qemu-devel] [PULL 3/5] xhci: Add No Op Command Gerd Hoffmann
2019-08-22 6:52 ` [Qemu-devel] [PULL 4/5] usb: reword -usb command-line option and mention xHCI Gerd Hoffmann
2019-08-22 6:52 ` [Qemu-devel] [PULL 5/5] ehci: fix queue->dev null ptr dereference Gerd Hoffmann
2019-08-22 15:13 ` [Qemu-devel] [PULL 0/5] Usb 20190822 patches Peter Maydell
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