app-emulation/qemu: security fixes, notably CVE-2017-2620, bug #609206

This commit applies a number of patches fixing
  CVE-2017-2620 #609206
  CVE-2017-2630 #609396
  CVE-2017-5973 #609334
  CVE-2017-5987 #609398
  CVE-2017-6058 #609638

Package-Manager: Portage-2.3.3, Repoman-2.3.1

app-emulation/qemu/files/qemu-2.8.0-CVE-2017-2620.patch

@@ -0,0 +1,56 @@
+From: Gerd Hoffmann <kraxel@redhat.com>
+Subject: [PATCH 3/3] cirrus: add blit_is_unsafe call to cirrus_bitblt_cputovideo
+
+CIRRUS_BLTMODE_MEMSYSSRC blits do NOT check blit destination
+and blit width, at all.  Oops.  Fix it.
+
+Security impact: high.
+
+The missing blit destination check allows to write to host memory.
+Basically same as CVE-2014-8106 for the other blit variants.
+
+The missing blit width check allows to overflow cirrus_bltbuf,
+with the attractive target cirrus_srcptr (current cirrus_bltbuf write
+position) being located right after cirrus_bltbuf in CirrusVGAState.
+
+Due to cirrus emulation writing cirrus_bltbuf bytewise the attacker
+hasn't full control over cirrus_srcptr though, only one byte can be
+changed.  Once the first byte has been modified further writes land
+elsewhere.
+
+[ This is CVE-2017-2620 / XSA-209  - Ian Jackson ]
+
+Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
+---
+ hw/display/cirrus_vga.c | 8 ++++++++
+ 1 file changed, 8 insertions(+)
+
+diff --git a/hw/display/cirrus_vga.c b/hw/display/cirrus_vga.c
+index 0e47cf8..a093dc8 100644
+--- a/hw/display/cirrus_vga.c
++++ b/hw/display/cirrus_vga.c
+@@ -899,6 +899,10 @@ static int cirrus_bitblt_cputovideo(CirrusVGAState * s)
+ {
+     int w;
+ 
++    if (blit_is_unsafe(s)) {
++        return 0;
++    }
++
+     s->cirrus_blt_mode &= ~CIRRUS_BLTMODE_MEMSYSSRC;
+     s->cirrus_srcptr = &s->cirrus_bltbuf[0];
+     s->cirrus_srcptr_end = &s->cirrus_bltbuf[0];
+@@ -924,6 +928,10 @@ static int cirrus_bitblt_cputovideo(CirrusVGAState * s)
+ 	}
+         s->cirrus_srccounter = s->cirrus_blt_srcpitch * s->cirrus_blt_height;
+     }
++
++    /* the blit_is_unsafe call above should catch this */
++    assert(s->cirrus_blt_srcpitch <= CIRRUS_BLTBUFSIZE);
++
+     s->cirrus_srcptr = s->cirrus_bltbuf;
+     s->cirrus_srcptr_end = s->cirrus_bltbuf + s->cirrus_blt_srcpitch;
+     cirrus_update_memory_access(s);
+-- 
+1.8.3.1
+

app-emulation/qemu/files/qemu-2.8.0-CVE-2017-2630.patch

@@ -0,0 +1,22 @@
+Comparison symbol is misused. It may lead to memory corruption.
+
+Signed-off-by: Vladimir Sementsov-Ogievskiy <address@hidden>
+---
+ nbd/client.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/nbd/client.c b/nbd/client.c
+index 6caf6bda6d..351731bc63 100644
+--- a/nbd/client.c
++++ b/nbd/client.c
+@@ -94,7 +94,7 @@ static ssize_t drop_sync(QIOChannel *ioc, size_t size)
+     char small[1024];
+     char *buffer;
+ 
+-    buffer = sizeof(small) < size ? small : g_malloc(MIN(65536, size));
++    buffer = sizeof(small) > size ? small : g_malloc(MIN(65536, size));
+     while (size > 0) {
+         ssize_t count = read_sync(ioc, buffer, MIN(65536, size));
+ 
+-- 
+2.11.0

app-emulation/qemu/files/qemu-2.8.0-CVE-2017-5973.patch

@@ -0,0 +1,87 @@
+Limits should be big enough that normal guest should not hit it.
+Add a tracepoint to log them, just in case.  Also, while being
+at it, log the existing link trb limit too.
+
+Reported-by: 李强 <address@hidden>
+Signed-off-by: Gerd Hoffmann <address@hidden>
+---
+ hw/usb/hcd-xhci.c   | 15 ++++++++++++++-
+ hw/usb/trace-events |  1 +
+ 2 files changed, 15 insertions(+), 1 deletion(-)
+
+diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c
+index fbf8a8b..28dd2f2 100644
+--- a/hw/usb/hcd-xhci.c
++++ b/hw/usb/hcd-xhci.c
+@@ -51,6 +51,8 @@
+ #define EV_QUEUE (((3 * 24) + 16) * MAXSLOTS)
+ 
+ #define TRB_LINK_LIMIT  4
++#define COMMAND_LIMIT   256
++#define TRANSFER_LIMIT  256
+ 
+ #define LEN_CAP         0x40
+ #define LEN_OPER        (0x400 + 0x10 * MAXPORTS)
+@@ -943,6 +945,7 @@ static TRBType xhci_ring_fetch(XHCIState *xhci, XHCIRing *ring, XHCITRB *trb,
+             return type;
+         } else {
+             if (++link_cnt > TRB_LINK_LIMIT) {
++                trace_usb_xhci_enforced_limit("trb-link");
+                 return 0;
+             }
+             ring->dequeue = xhci_mask64(trb->parameter);
+@@ -2060,6 +2063,7 @@ static void xhci_kick_epctx(XHCIEPContext *epctx, unsigned int streamid)
+     XHCIRing *ring;
+     USBEndpoint *ep = NULL;
+     uint64_t mfindex;
++    unsigned int count = 0;
+     int length;
+     int i;
+ 
+@@ -2172,6 +2176,10 @@ static void xhci_kick_epctx(XHCIEPContext *epctx, unsigned int streamid)
+             epctx->retry = xfer;
+             break;
+         }
++        if (count++ > TRANSFER_LIMIT) {
++            trace_usb_xhci_enforced_limit("transfers");
++            break;
++        }
+     }
+     epctx->kick_active--;
+ 
+@@ -2618,7 +2626,7 @@ static void xhci_process_commands(XHCIState *xhci)
+     TRBType type;
+     XHCIEvent event = {ER_COMMAND_COMPLETE, CC_SUCCESS};
+     dma_addr_t addr;
+-    unsigned int i, slotid = 0;
++    unsigned int i, slotid = 0, count = 0;
+ 
+     DPRINTF("xhci_process_commands()\n");
+     if (!xhci_running(xhci)) {
+@@ -2735,6 +2743,11 @@ static void xhci_process_commands(XHCIState *xhci)
+         }
+         event.slotid = slotid;
+         xhci_event(xhci, &event, 0);
++
++        if (count++ > COMMAND_LIMIT) {
++            trace_usb_xhci_enforced_limit("commands");
++            return;
++        }
+     }
+ }
+ 
+diff --git a/hw/usb/trace-events b/hw/usb/trace-events
+index fdd1d29..0c323d4 100644
+--- a/hw/usb/trace-events
++++ b/hw/usb/trace-events
+@@ -174,6 +174,7 @@ usb_xhci_xfer_retry(void *xfer) "%p"
+ usb_xhci_xfer_success(void *xfer, uint32_t bytes) "%p: len %d"
+ usb_xhci_xfer_error(void *xfer, uint32_t ret) "%p: ret %d"
+ usb_xhci_unimplemented(const char *item, int nr) "%s (0x%x)"
++usb_xhci_enforced_limit(const char *item) "%s"
+ 
+ # hw/usb/desc.c
+ usb_desc_device(int addr, int len, int ret) "dev %d query device, len %d, ret %d"
+-- 
+1.8.3.1
+

app-emulation/qemu/files/qemu-2.8.0-CVE-2017-5987.patch

@@ -0,0 +1,50 @@
+From: Prasad J Pandit <address@hidden>
+
+In the SDHCI protocol, the transfer mode register value
+is used during multi block transfer to check if block count
+register is enabled and should be updated. Transfer mode
+register could be set such that, block count register would
+not be updated, thus leading to an infinite loop. Add check
+to avoid it.
+
+Reported-by: Wjjzhang <address@hidden>
+Reported-by: Jiang Xin <address@hidden>
+Signed-off-by: Prasad J Pandit <address@hidden>
+---
+ hw/sd/sdhci.c | 10 +++++-----
+ 1 file changed, 5 insertions(+), 5 deletions(-)
+
+Update: use qemu_log_mask(LOG_UNIMP, ...)
+  -> https://lists.gnu.org/archive/html/qemu-devel/2017-02/msg02354.html
+
+diff --git a/hw/sd/sdhci.c b/hw/sd/sdhci.c
+index 5bd5ab6..a9c744b 100644
+--- a/hw/sd/sdhci.c
++++ b/hw/sd/sdhci.c
+@@ -486,6 +486,11 @@ static void sdhci_sdma_transfer_multi_blocks(SDHCIState *s)
+     uint32_t boundary_chk = 1 << (((s->blksize & 0xf000) >> 12) + 12);
+     uint32_t boundary_count = boundary_chk - (s->sdmasysad % boundary_chk);
+ 
++    if (!(s->trnmod & SDHC_TRNS_BLK_CNT_EN) || !s->blkcnt) {
++        qemu_log_mask(LOG_UNIMP, "infinite transfer is not supported\n");
++        return;
++    }
++
+     /* XXX: Some sd/mmc drivers (for example, u-boot-slp) do not account for
+      * possible stop at page boundary if initial address is not page aligned,
+      * allow them to work properly */
+@@ -797,11 +802,6 @@ static void sdhci_data_transfer(void *opaque)
+     if (s->trnmod & SDHC_TRNS_DMA) {
+         switch (SDHC_DMA_TYPE(s->hostctl)) {
+         case SDHC_CTRL_SDMA:
+-            if ((s->trnmod & SDHC_TRNS_MULTI) &&
+-                    (!(s->trnmod & SDHC_TRNS_BLK_CNT_EN) || s->blkcnt == 0)) {
+-                break;
+-            }
+-
+             if ((s->blkcnt == 1) || !(s->trnmod & SDHC_TRNS_MULTI)) {
+                 sdhci_sdma_transfer_single_block(s);
+             } else {
+-- 
+2.9.3
+

app-emulation/qemu/files/qemu-2.8.0-CVE-2017-6058.patch

@@ -0,0 +1,112 @@
+This patch fixed a problem that was introduced in commit eb700029.
+
+When net_rx_pkt_attach_iovec() calls eth_strip_vlan()
+this can result in pkt->ehdr_buf being overflowed, because
+ehdr_buf is only sizeof(struct eth_header) bytes large
+but eth_strip_vlan() can write
+sizeof(struct eth_header) + sizeof(struct vlan_header)
+bytes into it.
+
+Devices affected by this problem: vmxnet3.
+
+Reported-by: Peter Maydell <address@hidden>
+Signed-off-by: Dmitry Fleytman <address@hidden>
+---
+ hw/net/net_rx_pkt.c | 34 +++++++++++++++++-----------------
+ 1 file changed, 17 insertions(+), 17 deletions(-)
+
+diff --git a/hw/net/net_rx_pkt.c b/hw/net/net_rx_pkt.c
+index 1019b50..7c0beac 100644
+--- a/hw/net/net_rx_pkt.c
++++ b/hw/net/net_rx_pkt.c
+@@ -23,13 +23,13 @@
+ 
+ struct NetRxPkt {
+     struct virtio_net_hdr virt_hdr;
+-    uint8_t ehdr_buf[sizeof(struct eth_header)];
++    uint8_t ehdr_buf[sizeof(struct eth_header) + sizeof(struct vlan_header)];
+     struct iovec *vec;
+     uint16_t vec_len_total;
+     uint16_t vec_len;
+     uint32_t tot_len;
+     uint16_t tci;
+-    bool vlan_stripped;
++    size_t ehdr_buf_len;
+     bool has_virt_hdr;
+     eth_pkt_types_e packet_type;
+ 
+@@ -88,15 +88,13 @@ net_rx_pkt_pull_data(struct NetRxPkt *pkt,
+                         const struct iovec *iov, int iovcnt,
+                         size_t ploff)
+ {
+-    if (pkt->vlan_stripped) {
++    if (pkt->ehdr_buf_len) {
+         net_rx_pkt_iovec_realloc(pkt, iovcnt + 1);
+ 
+         pkt->vec[0].iov_base = pkt->ehdr_buf;
+-        pkt->vec[0].iov_len = sizeof(pkt->ehdr_buf);
+-
+-        pkt->tot_len =
+-            iov_size(iov, iovcnt) - ploff + sizeof(struct eth_header);
++        pkt->vec[0].iov_len = pkt->ehdr_buf_len;
+ 
++        pkt->tot_len = iov_size(iov, iovcnt) - ploff + pkt->ehdr_buf_len;
+         pkt->vec_len = iov_copy(pkt->vec + 1, pkt->vec_len_total - 1,
+                                 iov, iovcnt, ploff, pkt->tot_len);
+     } else {
+@@ -123,11 +121,12 @@ void net_rx_pkt_attach_iovec(struct NetRxPkt *pkt,
+     uint16_t tci = 0;
+     uint16_t ploff = iovoff;
+     assert(pkt);
+-    pkt->vlan_stripped = false;
+ 
+     if (strip_vlan) {
+-        pkt->vlan_stripped = eth_strip_vlan(iov, iovcnt, iovoff, pkt->ehdr_buf,
+-                                            &ploff, &tci);
++        pkt->ehdr_buf_len = eth_strip_vlan(iov, iovcnt, iovoff, pkt->ehdr_buf,
++                                           &ploff, &tci);
++    } else {
++        pkt->ehdr_buf_len = 0;
+     }
+ 
+     pkt->tci = tci;
+@@ -143,12 +142,13 @@ void net_rx_pkt_attach_iovec_ex(struct NetRxPkt *pkt,
+     uint16_t tci = 0;
+     uint16_t ploff = iovoff;
+     assert(pkt);
+-    pkt->vlan_stripped = false;
+ 
+     if (strip_vlan) {
+-        pkt->vlan_stripped = eth_strip_vlan_ex(iov, iovcnt, iovoff, vet,
+-                                               pkt->ehdr_buf,
+-                                               &ploff, &tci);
++        pkt->ehdr_buf_len = eth_strip_vlan_ex(iov, iovcnt, iovoff, vet,
++                                              pkt->ehdr_buf,
++                                              &ploff, &tci);
++    } else {
++        pkt->ehdr_buf_len = 0;
+     }
+ 
+     pkt->tci = tci;
+@@ -162,8 +162,8 @@ void net_rx_pkt_dump(struct NetRxPkt *pkt)
+     NetRxPkt *pkt = (NetRxPkt *)pkt;
+     assert(pkt);
+ 
+-    printf("RX PKT: tot_len: %d, vlan_stripped: %d, vlan_tag: %d\n",
+-              pkt->tot_len, pkt->vlan_stripped, pkt->tci);
++    printf("RX PKT: tot_len: %d, ehdr_buf_len: %lu, vlan_tag: %d\n",
++              pkt->tot_len, pkt->ehdr_buf_len, pkt->tci);
+ #endif
+ }
+ 
+@@ -426,7 +426,7 @@ bool net_rx_pkt_is_vlan_stripped(struct NetRxPkt *pkt)
+ {
+     assert(pkt);
+ 
+-    return pkt->vlan_stripped;
++    return pkt->ehdr_buf_len ? true : false;
+ }
+ 
+ bool net_rx_pkt_has_virt_hdr(struct NetRxPkt *pkt)
+-- 
+2.7.4

app-emulation/qemu/qemu-2.8.0-r3.ebuild

@@ -0,0 +1,699 @@
+# Copyright 1999-2017 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI="5"
+
+PYTHON_COMPAT=( python2_7 )
+PYTHON_REQ_USE="ncurses,readline"
+
+PLOCALES="bg de_DE fr_FR hu it tr zh_CN"
+
+inherit eutils flag-o-matic linux-info toolchain-funcs multilib python-r1 \
+	user udev fcaps readme.gentoo-r1 pax-utils l10n
+
+if [[ ${PV} = *9999* ]]; then
+	EGIT_REPO_URI="git://git.qemu.org/qemu.git"
+	inherit git-2
+	SRC_URI=""
+else
+	SRC_URI="http://wiki.qemu-project.org/download/${P}.tar.bz2"
+	KEYWORDS="~amd64 ~arm64 ~ppc ~ppc64 ~x86 ~x86-fbsd"
+fi
+
+DESCRIPTION="QEMU + Kernel-based Virtual Machine userland tools"
+HOMEPAGE="http://www.qemu.org http://www.linux-kvm.org"
+
+LICENSE="GPL-2 LGPL-2 BSD-2"
+SLOT="0"
+IUSE="accessibility +aio alsa bluetooth bzip2 +caps +curl debug +fdt glusterfs \
+gnutls gtk gtk2 infiniband iscsi +jpeg \
+kernel_linux kernel_FreeBSD lzo ncurses nfs nls numa opengl +pin-upstream-blobs
++png pulseaudio python \
+rbd sasl +seccomp sdl sdl2 selinux smartcard snappy spice ssh static static-softmmu
+static-user systemtap tci test +threads usb usbredir vde +vhost-net \
+virgl virtfs +vnc vte xattr xen xfs"
+
+COMMON_TARGETS="aarch64 alpha arm cris i386 m68k microblaze microblazeel mips
+mips64 mips64el mipsel or32 ppc ppc64 s390x sh4 sh4eb sparc sparc64
+x86_64"
+IUSE_SOFTMMU_TARGETS="${COMMON_TARGETS} lm32 moxie ppcemb tricore unicore32 xtensa xtensaeb"
+IUSE_USER_TARGETS="${COMMON_TARGETS} armeb mipsn32 mipsn32el ppc64abi32 ppc64le sparc32plus tilegx"
+
+use_softmmu_targets=$(printf ' qemu_softmmu_targets_%s' ${IUSE_SOFTMMU_TARGETS})
+use_user_targets=$(printf ' qemu_user_targets_%s' ${IUSE_USER_TARGETS})
+IUSE+=" ${use_softmmu_targets} ${use_user_targets}"
+
+# Allow no targets to be built so that people can get a tools-only build.
+# Block USE flag configurations known to not work.
+REQUIRED_USE="${PYTHON_REQUIRED_USE}
+	gtk2? ( gtk )
+	qemu_softmmu_targets_arm? ( fdt )
+	qemu_softmmu_targets_microblaze? ( fdt )
+	qemu_softmmu_targets_ppc? ( fdt )
+	qemu_softmmu_targets_ppc64? ( fdt )
+	sdl2? ( sdl )
+	static? ( static-softmmu static-user )
+	static-softmmu? ( !alsa !pulseaudio !bluetooth !opengl !gtk !gtk2 )
+	virtfs? ( xattr )
+	vte? ( gtk )"
+
+# Yep, you need both libcap and libcap-ng since virtfs only uses libcap.
+#
+# The attr lib isn't always linked in (although the USE flag is always
+# respected).  This is because qemu supports using the C library's API
+# when available rather than always using the extranl library.
+#
+# Older versions of gnutls are supported, but it's simpler to just require
+# the latest versions.  This is also why we require nettle.
+#
+# TODO: Split out tools deps into another var.  e.g. bzip2 is only used by
+# system binaries and tools, not user binaries.
+COMMON_LIB_DEPEND=">=dev-libs/glib-2.0[static-libs(+)]
+	sys-libs/zlib[static-libs(+)]
+	bzip2? ( app-arch/bzip2[static-libs(+)] )
+	xattr? ( sys-apps/attr[static-libs(+)] )"
+SOFTMMU_LIB_DEPEND="${COMMON_LIB_DEPEND}
+	>=x11-libs/pixman-0.28.0[static-libs(+)]
+	accessibility? ( app-accessibility/brltty[static-libs(+)] )
+	aio? ( dev-libs/libaio[static-libs(+)] )
+	alsa? ( >=media-libs/alsa-lib-1.0.13 )
+	bluetooth? ( net-wireless/bluez )
+	caps? ( sys-libs/libcap-ng[static-libs(+)] )
+	curl? ( >=net-misc/curl-7.15.4[static-libs(+)] )
+	fdt? ( >=sys-apps/dtc-1.4.0[static-libs(+)] )
+	glusterfs? ( >=sys-cluster/glusterfs-3.4.0[static-libs(+)] )
+	gnutls? (
+		dev-libs/nettle:=[static-libs(+)]
+		>=net-libs/gnutls-3.0:=[static-libs(+)]
+	)
+	gtk? (
+		gtk2? (
+			x11-libs/gtk+:2
+			vte? ( x11-libs/vte:0 )
+		)
+		!gtk2? (
+			x11-libs/gtk+:3
+			vte? ( x11-libs/vte:2.91 )
+		)
+	)
+	infiniband? ( sys-fabric/librdmacm:=[static-libs(+)] )
+	iscsi? ( net-libs/libiscsi )
+	jpeg? ( virtual/jpeg:0=[static-libs(+)] )
+	lzo? ( dev-libs/lzo:2[static-libs(+)] )
+	ncurses? (
+		sys-libs/ncurses:0=[unicode]
+		sys-libs/ncurses:0=[static-libs(+)]
+	)
+	nfs? ( >=net-fs/libnfs-1.9.3[static-libs(+)] )
+	numa? ( sys-process/numactl[static-libs(+)] )
+	opengl? (
+		virtual/opengl
+		media-libs/libepoxy[static-libs(+)]
+		media-libs/mesa[static-libs(+)]
+		media-libs/mesa[egl,gbm]
+	)
+	png? ( media-libs/libpng:0=[static-libs(+)] )
+	pulseaudio? ( media-sound/pulseaudio )
+	rbd? ( sys-cluster/ceph[static-libs(+)] )
+	sasl? ( dev-libs/cyrus-sasl[static-libs(+)] )
+	sdl? (
+		!sdl2? (
+			media-libs/libsdl[X]
+			>=media-libs/libsdl-1.2.11[static-libs(+)]
+		)
+		sdl2? (
+			media-libs/libsdl2[X]
+			media-libs/libsdl2[static-libs(+)]
+		)
+	)
+	seccomp? ( >=sys-libs/libseccomp-2.1.0[static-libs(+)] )
+	smartcard? ( >=app-emulation/libcacard-2.5.0[static-libs(+)] )
+	snappy? ( app-arch/snappy[static-libs(+)] )
+	spice? (
+		>=app-emulation/spice-protocol-0.12.3
+		>=app-emulation/spice-0.12.0[static-libs(+)]
+	)
+	ssh? ( >=net-libs/libssh2-1.2.8[static-libs(+)] )
+	usb? ( >=virtual/libusb-1-r2[static-libs(+)] )
+	usbredir? ( >=sys-apps/usbredir-0.6[static-libs(+)] )
+	vde? ( net-misc/vde[static-libs(+)] )
+	virgl? ( media-libs/virglrenderer[static-libs(+)] )
+	virtfs? ( sys-libs/libcap )
+	xfs? ( sys-fs/xfsprogs[static-libs(+)] )"
+USER_LIB_DEPEND="${COMMON_LIB_DEPEND}"
+X86_FIRMWARE_DEPEND="
+	>=sys-firmware/ipxe-1.0.0_p20130624
+	pin-upstream-blobs? (
+		~sys-firmware/seabios-1.10.1
+		~sys-firmware/sgabios-0.1_pre8
+		~sys-firmware/vgabios-0.7a
+	)
+	!pin-upstream-blobs? (
+		sys-firmware/seabios
+		sys-firmware/sgabios
+		sys-firmware/vgabios
+	)"
+CDEPEND="
+	!static-softmmu? ( $(printf "%s? ( ${SOFTMMU_LIB_DEPEND//\[static-libs(+)]} ) " ${use_softmmu_targets}) )
+	!static-user? ( $(printf "%s? ( ${USER_LIB_DEPEND//\[static-libs(+)]} ) " ${use_user_targets}) )
+	qemu_softmmu_targets_i386? ( ${X86_FIRMWARE_DEPEND} )
+	qemu_softmmu_targets_x86_64? ( ${X86_FIRMWARE_DEPEND} )
+	python? ( ${PYTHON_DEPS} )
+	systemtap? ( dev-util/systemtap )
+	xen? ( app-emulation/xen-tools:= )"
+DEPEND="${CDEPEND}
+	dev-lang/perl
+	=dev-lang/python-2*
+	sys-apps/texinfo
+	virtual/pkgconfig
+	kernel_linux? ( >=sys-kernel/linux-headers-2.6.35 )
+	gtk? ( nls? ( sys-devel/gettext ) )
+	static-softmmu? ( $(printf "%s? ( ${SOFTMMU_LIB_DEPEND} ) " ${use_softmmu_targets}) )
+	static-user? ( $(printf "%s? ( ${USER_LIB_DEPEND} ) " ${use_user_targets}) )
+	test? (
+		dev-libs/glib[utils]
+		sys-devel/bc
+	)"
+RDEPEND="${CDEPEND}
+	selinux? ( sec-policy/selinux-qemu )
+"
+
+STRIP_MASK="/usr/share/qemu/palcode-clipper"
+
+QA_PREBUILT="
+	usr/share/qemu/openbios-ppc
+	usr/share/qemu/openbios-sparc64
+	usr/share/qemu/openbios-sparc32
+	usr/share/qemu/palcode-clipper
+	usr/share/qemu/s390-ccw.img
+	usr/share/qemu/u-boot.e500
+"
+
+QA_WX_LOAD="usr/bin/qemu-i386
+	usr/bin/qemu-x86_64
+	usr/bin/qemu-alpha
+	usr/bin/qemu-arm
+	usr/bin/qemu-cris
+	usr/bin/qemu-m68k
+	usr/bin/qemu-microblaze
+	usr/bin/qemu-microblazeel
+	usr/bin/qemu-mips
+	usr/bin/qemu-mipsel
+	usr/bin/qemu-or32
+	usr/bin/qemu-ppc
+	usr/bin/qemu-ppc64
+	usr/bin/qemu-ppc64abi32
+	usr/bin/qemu-sh4
+	usr/bin/qemu-sh4eb
+	usr/bin/qemu-sparc
+	usr/bin/qemu-sparc64
+	usr/bin/qemu-armeb
+	usr/bin/qemu-sparc32plus
+	usr/bin/qemu-s390x
+	usr/bin/qemu-unicore32"
+
+DOC_CONTENTS="If you don't have kvm compiled into the kernel, make sure
+you have the kernel module loaded before running kvm. The easiest way to
+ensure that the kernel module is loaded is to load it on boot.\n
+For AMD CPUs the module is called 'kvm-amd'.\n
+For Intel CPUs the module is called 'kvm-intel'.\n
+Please review /etc/conf.d/modules for how to load these.\n\n
+Make sure your user is in the 'kvm' group\n
+Just run 'gpasswd -a <USER> kvm', then have <USER> re-login.\n\n
+For brand new installs, the default permissions on /dev/kvm might not let you
+access it.  You can tell udev to reset ownership/perms:\n
+udevadm trigger -c add /dev/kvm"
+
+qemu_support_kvm() {
+	if use qemu_softmmu_targets_x86_64 || use qemu_softmmu_targets_i386 \
+		use qemu_softmmu_targets_ppc || use qemu_softmmu_targets_ppc64 \
+		use qemu_softmmu_targets_s390x; then
+		return 0
+	fi
+
+	return 1
+}
+
+pkg_pretend() {
+	if use kernel_linux && kernel_is lt 2 6 25; then
+		eerror "This version of KVM requres a host kernel of 2.6.25 or higher."
+	elif use kernel_linux; then
+		if ! linux_config_exists; then
+			eerror "Unable to check your kernel for KVM support"
+		else
+			CONFIG_CHECK="~KVM ~TUN ~BRIDGE"
+			ERROR_KVM="You must enable KVM in your kernel to continue"
+			ERROR_KVM_AMD="If you have an AMD CPU, you must enable KVM_AMD in"
+			ERROR_KVM_AMD+=" your kernel configuration."
+			ERROR_KVM_INTEL="If you have an Intel CPU, you must enable"
+			ERROR_KVM_INTEL+=" KVM_INTEL in your kernel configuration."
+			ERROR_TUN="You will need the Universal TUN/TAP driver compiled"
+			ERROR_TUN+=" into your kernel or loaded as a module to use the"
+			ERROR_TUN+=" virtual network device if using -net tap."
+			ERROR_BRIDGE="You will also need support for 802.1d"
+			ERROR_BRIDGE+=" Ethernet Bridging for some network configurations."
+			use vhost-net && CONFIG_CHECK+=" ~VHOST_NET"
+			ERROR_VHOST_NET="You must enable VHOST_NET to have vhost-net"
+			ERROR_VHOST_NET+=" support"
+
+			if use amd64 || use x86 || use amd64-linux || use x86-linux; then
+				CONFIG_CHECK+=" ~KVM_AMD ~KVM_INTEL"
+			fi
+
+			use python && CONFIG_CHECK+=" ~DEBUG_FS"
+			ERROR_DEBUG_FS="debugFS support required for kvm_stat"
+
+			# Now do the actual checks setup above
+			check_extra_config
+		fi
+	fi
+
+	if grep -qs '/usr/bin/qemu-kvm' "${EROOT}"/etc/libvirt/qemu/*.xml; then
+		eerror "The kvm/qemu-kvm wrappers no longer exist, but your libvirt"
+		eerror "instances are still pointing to it.  Please update your"
+		eerror "configs in /etc/libvirt/qemu/ to use the -enable-kvm flag"
+		eerror "and the right system binary (e.g. qemu-system-x86_64)."
+		die "update your virt configs to not use qemu-kvm"
+	fi
+}
+
+pkg_setup() {
+	enewgroup kvm 78
+}
+
+# Sanity check to make sure target lists are kept up-to-date.
+check_targets() {
+	local var=$1 mak=$2
+	local detected sorted
+
+	pushd "${S}"/default-configs >/dev/null || die
+
+	# Force C locale until glibc is updated. #564936
+	detected=$(echo $(printf '%s\n' *-${mak}.mak | sed "s:-${mak}.mak::" | LC_COLLATE=C sort -u))
+	sorted=$(echo $(printf '%s\n' ${!var} | LC_COLLATE=C sort -u))
+	if [[ ${sorted} != "${detected}" ]] ; then
+		eerror "The ebuild needs to be kept in sync."
+		eerror "${var}: ${sorted}"
+		eerror "$(printf '%-*s' ${#var} configure): ${detected}"
+		die "sync ${var} to the list of targets"
+	fi
+
+	popd >/dev/null
+}
+
+handle_locales() {
+	# Make sure locale list is kept up-to-date.
+	local detected sorted
+	detected=$(echo $(cd po && printf '%s\n' *.po | grep -v messages.po | sed 's:.po$::' | sort -u))
+	sorted=$(echo $(printf '%s\n' ${PLOCALES} | sort -u))
+	if [[ ${sorted} != "${detected}" ]] ; then
+		eerror "The ebuild needs to be kept in sync."
+		eerror "PLOCALES: ${sorted}"
+		eerror " po/*.po: ${detected}"
+		die "sync PLOCALES"
+	fi
+
+	# Deal with selective install of locales.
+	if use nls ; then
+		# Delete locales the user does not want. #577814
+		rm_loc() { rm po/$1.po || die; }
+		l10n_for_each_disabled_locale_do rm_loc
+	else
+		# Cheap hack to disable gettext .mo generation.
+		rm -f po/*.po
+	fi
+}
+
+src_prepare() {
+	check_targets IUSE_SOFTMMU_TARGETS softmmu
+	check_targets IUSE_USER_TARGETS linux-user
+
+	# Alter target makefiles to accept CFLAGS set via flag-o
+	sed -i -r \
+		-e 's/^(C|OP_C|HELPER_C)FLAGS=/\1FLAGS+=/' \
+		Makefile Makefile.target || die
+
+	epatch "${FILESDIR}"/${PN}-2.5.0-cflags.patch
+	epatch "${FILESDIR}"/${PN}-2.5.0-sysmacros.patch
+	epatch "${FILESDIR}"/${PN}-2.7.0-CVE-2016-8669-1.patch #597108
+	epatch "${FILESDIR}"/${PN}-2.8.0-CVE-2016-9908.patch   #601826
+	epatch "${FILESDIR}"/${PN}-2.8.0-CVE-2016-9912.patch   #602630
+	epatch "${FILESDIR}"/${PN}-2.8.0-CVE-2016-10028.patch  #603444
+	epatch "${FILESDIR}"/${PN}-2.8.0-CVE-2016-10155.patch  #606720
+	epatch "${FILESDIR}"/${PN}-2.8.0-CVE-2017-2615.patch   #608034
+	epatch "${FILESDIR}"/${PN}-2.8.0-CVE-2017-2630.patch   #609396
+	epatch "${FILESDIR}"/${PN}-2.8.0-CVE-2017-5525-1.patch #606264
+	epatch "${FILESDIR}"/${PN}-2.8.0-CVE-2017-5525-2.patch
+	epatch "${FILESDIR}"/${PN}-2.8.0-CVE-2017-5552.patch   #606722
+	epatch "${FILESDIR}"/${PN}-2.8.0-CVE-2017-5578.patch   #607000
+	epatch "${FILESDIR}"/${PN}-2.8.0-CVE-2017-5579.patch   #607100
+	epatch "${FILESDIR}"/${PN}-2.8.0-CVE-2017-5667.patch   #607766
+	epatch "${FILESDIR}"/${PN}-2.8.0-CVE-2017-5856.patch   #608036
+	epatch "${FILESDIR}"/${PN}-2.8.0-CVE-2017-5857.patch   #608038
+	epatch "${FILESDIR}"/${PN}-2.8.0-CVE-2017-5898.patch   #608520
+	epatch "${FILESDIR}"/${PN}-2.8.0-CVE-2017-5931.patch   #608728
+	epatch "${FILESDIR}"/${PN}-2.8.0-CVE-2017-5973.patch   #609334
+	epatch "${FILESDIR}"/${PN}-2.8.0-CVE-2017-5987.patch   #609398
+	epatch "${FILESDIR}"/${PN}-2.8.0-CVE-2017-6058.patch   #609638
+	epatch "${FILESDIR}"/${PN}-2.8.0-CVE-2017-2620.patch   #609206
+
+	# Fix ld and objcopy being called directly
+	tc-export AR LD OBJCOPY
+
+	# Verbose builds
+	MAKEOPTS+=" V=1"
+
+	epatch_user
+
+	# Run after we've applied all patches.
+	handle_locales
+}
+
+##
+# configures qemu based on the build directory and the build type
+# we are using.
+#
+qemu_src_configure() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	local buildtype=$1
+	local builddir="${S}/${buildtype}-build"
+	local static_flag="static-${buildtype}"
+
+	mkdir "${builddir}"
+
+	local conf_opts=(
+		--prefix=/usr
+		--sysconfdir=/etc
+		--libdir=/usr/$(get_libdir)
+		--docdir=/usr/share/doc/${PF}/html
+		--disable-bsd-user
+		--disable-guest-agent
+		--disable-strip
+		--disable-werror
+		# We support gnutls/nettle for crypto operations.  It is possible
+		# to use gcrypt when gnutls/nettle are disabled (but not when they
+		# are enabled), but it's not really worth the hassle.  Disable it
+		# all the time to avoid automatically detecting it. #568856
+		--disable-gcrypt
+		--python="${PYTHON}"
+		--cc="$(tc-getCC)"
+		--cxx="$(tc-getCXX)"
+		--host-cc="$(tc-getBUILD_CC)"
+		$(use_enable debug debug-info)
+		$(use_enable debug debug-tcg)
+		--enable-docs
+		$(use_enable tci tcg-interpreter)
+		$(use_enable xattr attr)
+	)
+
+	# Disable options not used by user targets as the default configure
+	# options will autoprobe and try to link in a bunch of unused junk.
+	conf_softmmu() {
+		if [[ ${buildtype} == "user" ]] ; then
+			echo "--disable-${2:-$1}"
+		else
+			use_enable "$@"
+		fi
+	}
+	conf_opts+=(
+		$(conf_softmmu accessibility brlapi)
+		$(conf_softmmu aio linux-aio)
+		$(conf_softmmu bzip2)
+		$(conf_softmmu bluetooth bluez)
+		$(conf_softmmu caps cap-ng)
+		$(conf_softmmu curl)
+		$(conf_softmmu fdt)
+		$(conf_softmmu glusterfs)
+		$(conf_softmmu gnutls)
+		$(conf_softmmu gnutls nettle)
+		$(conf_softmmu gtk)
+		$(conf_softmmu infiniband rdma)
+		$(conf_softmmu iscsi libiscsi)
+		$(conf_softmmu jpeg vnc-jpeg)
+		$(conf_softmmu kernel_linux kvm)
+		$(conf_softmmu lzo)
+		$(conf_softmmu ncurses curses)
+		$(conf_softmmu nfs libnfs)
+		$(conf_softmmu numa)
+		$(conf_softmmu opengl)
+		$(conf_softmmu png vnc-png)
+		$(conf_softmmu rbd)
+		$(conf_softmmu sasl vnc-sasl)
+		$(conf_softmmu sdl)
+		$(conf_softmmu seccomp)
+		$(conf_softmmu smartcard)
+		$(conf_softmmu snappy)
+		$(conf_softmmu spice)
+		$(conf_softmmu ssh libssh2)
+		$(conf_softmmu usb libusb)
+		$(conf_softmmu usbredir usb-redir)
+		$(conf_softmmu vde)
+		$(conf_softmmu vhost-net)
+		$(conf_softmmu virgl virglrenderer)
+		$(conf_softmmu virtfs)
+		$(conf_softmmu vnc)
+		$(conf_softmmu vte)
+		$(conf_softmmu xen)
+		$(conf_softmmu xen xen-pci-passthrough)
+		$(conf_softmmu xfs xfsctl)
+	)
+
+	case ${buildtype} in
+	user)
+		conf_opts+=(
+			--enable-linux-user
+			--disable-system
+			--disable-blobs
+			--disable-tools
+		)
+		;;
+	softmmu)
+		# audio options
+		local audio_opts="oss"
+		use alsa && audio_opts="alsa,${audio_opts}"
+		use sdl && audio_opts="sdl,${audio_opts}"
+		use pulseaudio && audio_opts="pa,${audio_opts}"
+
+		conf_opts+=(
+			--disable-linux-user
+			--enable-system
+			--with-system-pixman
+			--audio-drv-list="${audio_opts}"
+		)
+		use gtk && conf_opts+=( --with-gtkabi=$(usex gtk2 2.0 3.0) )
+		use sdl && conf_opts+=( --with-sdlabi=$(usex sdl2 2.0 1.2) )
+		;;
+	tools)
+		conf_opts+=(
+			--disable-linux-user
+			--disable-system
+			--disable-blobs
+			$(use_enable bzip2)
+		)
+		static_flag="static"
+		;;
+	esac
+
+	local targets="${buildtype}_targets"
+	[[ -n ${targets} ]] && conf_opts+=( --target-list="${!targets}" )
+
+	# Add support for SystemTAP
+	use systemtap && conf_opts+=( --enable-trace-backend=dtrace )
+
+	# We always want to attempt to build with PIE support as it results
+	# in a more secure binary. But it doesn't work with static or if
+	# the current GCC doesn't have PIE support.
+	if use ${static_flag}; then
+		conf_opts+=( --static --disable-pie )
+	else
+		gcc-specs-pie && conf_opts+=( --enable-pie )
+	fi
+
+	echo "../configure ${conf_opts[*]}"
+	cd "${builddir}"
+	../configure "${conf_opts[@]}" || die "configure failed"
+
+	# FreeBSD's kernel does not support QEMU assigning/grabbing
+	# host USB devices yet
+	use kernel_FreeBSD && \
+		sed -i -E -e "s|^(HOST_USB=)bsd|\1stub|" "${S}"/config-host.mak
+}
+
+src_configure() {
+	local target
+
+	python_setup
+
+	softmmu_targets= softmmu_bins=()
+	user_targets= user_bins=()
+
+	for target in ${IUSE_SOFTMMU_TARGETS} ; do
+		if use "qemu_softmmu_targets_${target}"; then
+			softmmu_targets+=",${target}-softmmu"
+			softmmu_bins+=( "qemu-system-${target}" )
+		fi
+	done
+
+	for target in ${IUSE_USER_TARGETS} ; do
+		if use "qemu_user_targets_${target}"; then
+			user_targets+=",${target}-linux-user"
+			user_bins+=( "qemu-${target}" )
+		fi
+	done
+
+	softmmu_targets=${softmmu_targets#,}
+	user_targets=${user_targets#,}
+
+	[[ -n ${softmmu_targets} ]] && qemu_src_configure "softmmu"
+	[[ -n ${user_targets}    ]] && qemu_src_configure "user"
+	[[ -z ${softmmu_targets}${user_targets} ]] && qemu_src_configure "tools"
+}
+
+src_compile() {
+	if [[ -n ${user_targets} ]]; then
+		cd "${S}/user-build"
+		default
+	fi
+
+	if [[ -n ${softmmu_targets} ]]; then
+		cd "${S}/softmmu-build"
+		default
+	fi
+
+	if [[ -z ${softmmu_targets}${user_targets} ]]; then
+		cd "${S}/tools-build"
+		default
+	fi
+}
+
+src_test() {
+	if [[ -n ${softmmu_targets} ]]; then
+		cd "${S}/softmmu-build"
+		pax-mark m */qemu-system-* #515550
+		emake -j1 check
+		emake -j1 check-report.html
+	fi
+}
+
+qemu_python_install() {
+	python_domodule "${S}/scripts/qmp/qmp.py"
+
+	python_doscript "${S}/scripts/kvm/vmxcap"
+	python_doscript "${S}/scripts/qmp/qmp-shell"
+	python_doscript "${S}/scripts/qmp/qemu-ga-client"
+}
+
+src_install() {
+	if [[ -n ${user_targets} ]]; then
+		cd "${S}/user-build"
+		emake DESTDIR="${ED}" install
+
+		# Install binfmt handler init script for user targets
+		newinitd "${FILESDIR}/qemu-binfmt.initd-r1" qemu-binfmt
+	fi
+
+	if [[ -n ${softmmu_targets} ]]; then
+		cd "${S}/softmmu-build"
+		emake DESTDIR="${ED}" install
+
+		# This might not exist if the test failed. #512010
+		[[ -e check-report.html ]] && dohtml check-report.html
+
+		if use kernel_linux; then
+			udev_newrules "${FILESDIR}"/65-kvm.rules-r1 65-kvm.rules
+		fi
+
+		if use python; then
+			python_foreach_impl qemu_python_install
+		fi
+	fi
+
+	if [[ -z ${softmmu_targets}${user_targets} ]]; then
+		cd "${S}/tools-build"
+		emake DESTDIR="${ED}" install
+	fi
+
+	# Disable mprotect on the qemu binaries as they use JITs to be fast #459348
+	pushd "${ED}"/usr/bin >/dev/null
+	pax-mark m "${softmmu_bins[@]}" "${user_bins[@]}"
+	popd >/dev/null
+
+	# Install config file example for qemu-bridge-helper
+	insinto "/etc/qemu"
+	doins "${FILESDIR}/bridge.conf"
+
+	# Remove the docdir placed qmp-commands.txt
+	mv "${ED}/usr/share/doc/${PF}/html/qmp-commands.txt" "${S}/docs/" || die
+
+	cd "${S}"
+	dodoc Changelog MAINTAINERS docs/specs/pci-ids.txt
+	newdoc pc-bios/README README.pc-bios
+	dodoc docs/qmp-*.txt
+
+	if [[ -n ${softmmu_targets} ]]; then
+		# Remove SeaBIOS since we're using the SeaBIOS packaged one
+		rm "${ED}/usr/share/qemu/bios.bin"
+		if use qemu_softmmu_targets_x86_64 || use qemu_softmmu_targets_i386; then
+			dosym ../seabios/bios.bin /usr/share/qemu/bios.bin
+		fi
+
+		# Remove vgabios since we're using the vgabios packaged one
+		rm "${ED}/usr/share/qemu/vgabios.bin"
+		rm "${ED}/usr/share/qemu/vgabios-cirrus.bin"
+		rm "${ED}/usr/share/qemu/vgabios-qxl.bin"
+		rm "${ED}/usr/share/qemu/vgabios-stdvga.bin"
+		rm "${ED}/usr/share/qemu/vgabios-vmware.bin"
+		if use qemu_softmmu_targets_x86_64 || use qemu_softmmu_targets_i386; then
+			dosym ../vgabios/vgabios.bin /usr/share/qemu/vgabios.bin
+			dosym ../vgabios/vgabios-cirrus.bin /usr/share/qemu/vgabios-cirrus.bin
+			dosym ../vgabios/vgabios-qxl.bin /usr/share/qemu/vgabios-qxl.bin
+			dosym ../vgabios/vgabios-stdvga.bin /usr/share/qemu/vgabios-stdvga.bin
+			dosym ../vgabios/vgabios-vmware.bin /usr/share/qemu/vgabios-vmware.bin
+		fi
+
+		# Remove sgabios since we're using the sgabios packaged one
+		rm "${ED}/usr/share/qemu/sgabios.bin"
+		if use qemu_softmmu_targets_x86_64 || use qemu_softmmu_targets_i386; then
+			dosym ../sgabios/sgabios.bin /usr/share/qemu/sgabios.bin
+		fi
+
+		# Remove iPXE since we're using the iPXE packaged one
+		rm "${ED}"/usr/share/qemu/pxe-*.rom
+		if use qemu_softmmu_targets_x86_64 || use qemu_softmmu_targets_i386; then
+			dosym ../ipxe/8086100e.rom /usr/share/qemu/pxe-e1000.rom
+			dosym ../ipxe/80861209.rom /usr/share/qemu/pxe-eepro100.rom
+			dosym ../ipxe/10500940.rom /usr/share/qemu/pxe-ne2k_pci.rom
+			dosym ../ipxe/10222000.rom /usr/share/qemu/pxe-pcnet.rom
+			dosym ../ipxe/10ec8139.rom /usr/share/qemu/pxe-rtl8139.rom
+			dosym ../ipxe/1af41000.rom /usr/share/qemu/pxe-virtio.rom
+		fi
+	fi
+
+	qemu_support_kvm && readme.gentoo_create_doc
+}
+
+pkg_postinst() {
+	if qemu_support_kvm; then
+		readme.gentoo_print_elog
+	fi
+
+	if [[ -n ${softmmu_targets} ]] && use kernel_linux; then
+		udev_reload
+	fi
+
+	fcaps cap_net_admin /usr/libexec/qemu-bridge-helper
+}
+
+pkg_info() {
+	echo "Using:"
+	echo "  $(best_version app-emulation/spice-protocol)"
+	echo "  $(best_version sys-firmware/ipxe)"
+	echo "  $(best_version sys-firmware/seabios)"
+	if has_version 'sys-firmware/seabios[binary]'; then
+		echo "    USE=binary"
+	else
+		echo "    USE=''"
+	fi
+	echo "  $(best_version sys-firmware/vgabios)"
+}