From: Lee Chee Yang <chee.yang....@intel.com> (cherry picked from commit 6774efd1e3d0bd5c8c34f84dcf4f698d7eafb36a) Signed-off-by: Lee Chee Yang <chee.yang....@intel.com> Signed-off-by: Alexandre Belloni <alexandre.bell...@bootlin.com> Signed-off-by: Richard Purdie <richard.pur...@linuxfoundation.org> --- meta/recipes-devtools/qemu/qemu.inc | 2 + .../qemu/qemu/CVE-2021-3527-1.patch | 42 +++++++++++++ .../qemu/qemu/CVE-2021-3527-2.patch | 59 +++++++++++++++++++ 3 files changed, 103 insertions(+) create mode 100644 meta/recipes-devtools/qemu/qemu/CVE-2021-3527-1.patch create mode 100644 meta/recipes-devtools/qemu/qemu/CVE-2021-3527-2.patch
diff --git a/meta/recipes-devtools/qemu/qemu.inc b/meta/recipes-devtools/qemu/qemu.inc index 5f7d82dfed..a22721004e 100644 --- a/meta/recipes-devtools/qemu/qemu.inc +++ b/meta/recipes-devtools/qemu/qemu.inc @@ -64,6 +64,8 @@ SRC_URI = "https://download.qemu.org/${BPN}-${PV}.tar.xz \ file://0005-vhost-user-gpu-fix-memory-leak-in-virgl_cmd_resource.patch \ file://0006-vhost-user-gpu-fix-memory-leak-in-virgl_resource_att.patch \ file://0007-vhost-user-gpu-fix-OOB-write-in-virgl_cmd_get_capset.patch \ + file://CVE-2021-3527-1.patch \ + file://CVE-2021-3527-2.patch \ " UPSTREAM_CHECK_REGEX = "qemu-(?P<pver>\d+(\.\d+)+)\.tar" diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2021-3527-1.patch b/meta/recipes-devtools/qemu/qemu/CVE-2021-3527-1.patch new file mode 100644 index 0000000000..77a5385692 --- /dev/null +++ b/meta/recipes-devtools/qemu/qemu/CVE-2021-3527-1.patch @@ -0,0 +1,42 @@ +From 05a40b172e4d691371534828078be47e7fff524c Mon Sep 17 00:00:00 2001 +From: Gerd Hoffmann <kra...@redhat.com> +Date: Mon, 3 May 2021 15:29:15 +0200 +Subject: [PATCH] usb: limit combined packets to 1 MiB (CVE-2021-3527) + +usb-host and usb-redirect try to batch bulk transfers by combining many +small usb packets into a single, large transfer request, to reduce the +overhead and improve performance. + +This patch adds a size limit of 1 MiB for those combined packets to +restrict the host resources the guest can bind that way. + +Signed-off-by: Gerd Hoffmann <kra...@redhat.com> +Message-Id: <20210503132915.2335822-6-kra...@redhat.com> + +Upstream-Status: Backport +https://gitlab.com/qemu-project/qemu/-/commit/05a40b172e4d691371534828078be47e7fff524c +CVE: CVE-2021-3527 +Signed-off-by: Chee Yang Lee <chee.yang....@intel.com> + +--- + hw/usb/combined-packet.c | 4 +++- + 1 file changed, 3 insertions(+), 1 deletion(-) + +diff --git a/hw/usb/combined-packet.c b/hw/usb/combined-packet.c +index 5d57e883dc..e56802f89a 100644 +--- a/hw/usb/combined-packet.c ++++ b/hw/usb/combined-packet.c +@@ -171,7 +171,9 @@ void usb_ep_combine_input_packets(USBEndpoint *ep) + if ((p->iov.size % ep->max_packet_size) != 0 || !p->short_not_ok || + next == NULL || + /* Work around for Linux usbfs bulk splitting + migration */ +- (totalsize == (16 * KiB - 36) && p->int_req)) { ++ (totalsize == (16 * KiB - 36) && p->int_req) || ++ /* Next package may grow combined package over 1MiB */ ++ totalsize > 1 * MiB - ep->max_packet_size) { + usb_device_handle_data(ep->dev, first); + assert(first->status == USB_RET_ASYNC); + if (first->combined) { +-- +GitLab + diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2021-3527-2.patch b/meta/recipes-devtools/qemu/qemu/CVE-2021-3527-2.patch new file mode 100644 index 0000000000..6371aced12 --- /dev/null +++ b/meta/recipes-devtools/qemu/qemu/CVE-2021-3527-2.patch @@ -0,0 +1,59 @@ +From 7ec54f9eb62b5d177e30eb8b1cad795a5f8d8986 Mon Sep 17 00:00:00 2001 +From: Gerd Hoffmann <kra...@redhat.com> +Date: Mon, 3 May 2021 15:29:12 +0200 +Subject: [PATCH] usb/redir: avoid dynamic stack allocation (CVE-2021-3527) +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Use autofree heap allocation instead. + +Fixes: 4f4321c11ff ("usb: use iovecs in USBPacket") +Reviewed-by: Philippe Mathieu-Daudé <phi...@redhat.com> +Signed-off-by: Gerd Hoffmann <kra...@redhat.com> +Tested-by: Philippe Mathieu-Daudé <phi...@redhat.com> +Message-Id: <20210503132915.2335822-3-kra...@redhat.com> + +Upstream-Status: Backport +https://gitlab.com/qemu-project/qemu/-/commit/7ec54f9eb62b5d177e30eb8b1cad795a5f8d8986 +CVE: CVE-2021-3527 +Signed-off-by: Chee Yang Lee <chee.yang....@intel.com> + +--- + hw/usb/redirect.c | 6 +++--- + 1 file changed, 3 insertions(+), 3 deletions(-) + +diff --git a/hw/usb/redirect.c b/hw/usb/redirect.c +index 17f06f3417..6a75b0dc4a 100644 +--- a/hw/usb/redirect.c ++++ b/hw/usb/redirect.c +@@ -620,7 +620,7 @@ static void usbredir_handle_iso_data(USBRedirDevice *dev, USBPacket *p, + .endpoint = ep, + .length = p->iov.size + }; +- uint8_t buf[p->iov.size]; ++ g_autofree uint8_t *buf = g_malloc(p->iov.size); + /* No id, we look at the ep when receiving a status back */ + usb_packet_copy(p, buf, p->iov.size); + usbredirparser_send_iso_packet(dev->parser, 0, &iso_packet, +@@ -818,7 +818,7 @@ static void usbredir_handle_bulk_data(USBRedirDevice *dev, USBPacket *p, + usbredirparser_send_bulk_packet(dev->parser, p->id, + &bulk_packet, NULL, 0); + } else { +- uint8_t buf[size]; ++ g_autofree uint8_t *buf = g_malloc(size); + usb_packet_copy(p, buf, size); + usbredir_log_data(dev, "bulk data out:", buf, size); + usbredirparser_send_bulk_packet(dev->parser, p->id, +@@ -923,7 +923,7 @@ static void usbredir_handle_interrupt_out_data(USBRedirDevice *dev, + USBPacket *p, uint8_t ep) + { + struct usb_redir_interrupt_packet_header interrupt_packet; +- uint8_t buf[p->iov.size]; ++ g_autofree uint8_t *buf = g_malloc(p->iov.size); + + DPRINTF("interrupt-out ep %02X len %zd id %"PRIu64"\n", ep, + p->iov.size, p->id); +-- +GitLab + -- 2.17.1
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