From ad030e8ff0be18fa09849db97158a607ffa81492 Mon Sep 17 00:00:00 2001 From: Lee Chee Yang Date: Tue, 7 Apr 2020 13:00:04 +0800 Subject: qemu: fix CVE-2020-11102 (From OE-Core rev: 47f8d0da838c59ab419f0cbae941f84693cb53c0) Signed-off-by: Lee Chee Yang Signed-off-by: Richard Purdie --- meta/recipes-devtools/qemu/qemu.inc | 1 + .../qemu/qemu/CVE-2020-11102.patch | 148 +++++++++++++++++++++ 2 files changed, 149 insertions(+) create mode 100644 meta/recipes-devtools/qemu/qemu/CVE-2020-11102.patch diff --git a/meta/recipes-devtools/qemu/qemu.inc b/meta/recipes-devtools/qemu/qemu.inc index 530ee82fa9..f17a046fca 100644 --- a/meta/recipes-devtools/qemu/qemu.inc +++ b/meta/recipes-devtools/qemu/qemu.inc @@ -36,6 +36,7 @@ SRC_URI = "https://download.qemu.org/${BPN}-${PV}.tar.xz \ file://0001-Add-enable-disable-udev.patch \ file://CVE-2020-7211.patch \ file://0001-qemu-Do-not-include-file-if-not-exists.patch \ + file://CVE-2020-11102.patch \ " UPSTREAM_CHECK_REGEX = "qemu-(?P\d+(\.\d+)+)\.tar" diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2020-11102.patch b/meta/recipes-devtools/qemu/qemu/CVE-2020-11102.patch new file mode 100644 index 0000000000..e8f3e1dbdb --- /dev/null +++ b/meta/recipes-devtools/qemu/qemu/CVE-2020-11102.patch @@ -0,0 +1,148 @@ +From 8ffb7265af64ec81748335ec8f20e7ab542c3850 Mon Sep 17 00:00:00 2001 +From: Prasad J Pandit +Date: Tue, 24 Mar 2020 22:57:22 +0530 +Subject: [PATCH] net: tulip: check frame size and r/w data length + +Tulip network driver while copying tx/rx buffers does not check +frame size against r/w data length. This may lead to OOB buffer +access. Add check to avoid it. + +Limit iterations over descriptors to avoid potential infinite +loop issue in tulip_xmit_list_update. + +Reported-by: Li Qiang +Reported-by: Ziming Zhang +Reported-by: Jason Wang +Tested-by: Li Qiang +Reviewed-by: Li Qiang +Signed-off-by: Prasad J Pandit +Signed-off-by: Jason Wang + +Upstream-Status: Backport [https://git.qemu.org/?p=qemu.git;a=commit;h=8ffb7265af64ec81748335ec8f20e7ab542c3850] +CVE: CVE-2020-11102 +Signed-off-by: Chee Yang Lee +--- + hw/net/tulip.c | 36 +++++++++++++++++++++++++++--------- + 1 file changed, 27 insertions(+), 9 deletions(-) + +diff --git a/hw/net/tulip.c b/hw/net/tulip.c +index cfac271..1295f51 100644 +--- a/hw/net/tulip.c ++++ b/hw/net/tulip.c +@@ -170,6 +170,10 @@ static void tulip_copy_rx_bytes(TULIPState *s, struct tulip_descriptor *desc) + } else { + len = s->rx_frame_len; + } ++ ++ if (s->rx_frame_len + len > sizeof(s->rx_frame)) { ++ return; ++ } + pci_dma_write(&s->dev, desc->buf_addr1, s->rx_frame + + (s->rx_frame_size - s->rx_frame_len), len); + s->rx_frame_len -= len; +@@ -181,6 +185,10 @@ static void tulip_copy_rx_bytes(TULIPState *s, struct tulip_descriptor *desc) + } else { + len = s->rx_frame_len; + } ++ ++ if (s->rx_frame_len + len > sizeof(s->rx_frame)) { ++ return; ++ } + pci_dma_write(&s->dev, desc->buf_addr2, s->rx_frame + + (s->rx_frame_size - s->rx_frame_len), len); + s->rx_frame_len -= len; +@@ -227,7 +235,8 @@ static ssize_t tulip_receive(TULIPState *s, const uint8_t *buf, size_t size) + + trace_tulip_receive(buf, size); + +- if (size < 14 || size > 2048 || s->rx_frame_len || tulip_rx_stopped(s)) { ++ if (size < 14 || size > sizeof(s->rx_frame) - 4 ++ || s->rx_frame_len || tulip_rx_stopped(s)) { + return 0; + } + +@@ -275,7 +284,6 @@ static ssize_t tulip_receive_nc(NetClientState *nc, + return tulip_receive(qemu_get_nic_opaque(nc), buf, size); + } + +- + static NetClientInfo net_tulip_info = { + .type = NET_CLIENT_DRIVER_NIC, + .size = sizeof(NICState), +@@ -558,7 +566,7 @@ static void tulip_tx(TULIPState *s, struct tulip_descriptor *desc) + if ((s->csr[6] >> CSR6_OM_SHIFT) & CSR6_OM_MASK) { + /* Internal or external Loopback */ + tulip_receive(s, s->tx_frame, s->tx_frame_len); +- } else { ++ } else if (s->tx_frame_len <= sizeof(s->tx_frame)) { + qemu_send_packet(qemu_get_queue(s->nic), + s->tx_frame, s->tx_frame_len); + } +@@ -570,23 +578,31 @@ static void tulip_tx(TULIPState *s, struct tulip_descriptor *desc) + } + } + +-static void tulip_copy_tx_buffers(TULIPState *s, struct tulip_descriptor *desc) ++static int tulip_copy_tx_buffers(TULIPState *s, struct tulip_descriptor *desc) + { + int len1 = (desc->control >> TDES1_BUF1_SIZE_SHIFT) & TDES1_BUF1_SIZE_MASK; + int len2 = (desc->control >> TDES1_BUF2_SIZE_SHIFT) & TDES1_BUF2_SIZE_MASK; + ++ if (s->tx_frame_len + len1 > sizeof(s->tx_frame)) { ++ return -1; ++ } + if (len1) { + pci_dma_read(&s->dev, desc->buf_addr1, + s->tx_frame + s->tx_frame_len, len1); + s->tx_frame_len += len1; + } + ++ if (s->tx_frame_len + len2 > sizeof(s->tx_frame)) { ++ return -1; ++ } + if (len2) { + pci_dma_read(&s->dev, desc->buf_addr2, + s->tx_frame + s->tx_frame_len, len2); + s->tx_frame_len += len2; + } + desc->status = (len1 + len2) ? 0 : 0x7fffffff; ++ ++ return 0; + } + + static void tulip_setup_filter_addr(TULIPState *s, uint8_t *buf, int n) +@@ -651,13 +667,15 @@ static uint32_t tulip_ts(TULIPState *s) + + static void tulip_xmit_list_update(TULIPState *s) + { ++#define TULIP_DESC_MAX 128 ++ uint8_t i = 0; + struct tulip_descriptor desc; + + if (tulip_ts(s) != CSR5_TS_SUSPENDED) { + return; + } + +- for (;;) { ++ for (i = 0; i < TULIP_DESC_MAX; i++) { + tulip_desc_read(s, s->current_tx_desc, &desc); + tulip_dump_tx_descriptor(s, &desc); + +@@ -675,10 +693,10 @@ static void tulip_xmit_list_update(TULIPState *s) + s->tx_frame_len = 0; + } + +- tulip_copy_tx_buffers(s, &desc); +- +- if (desc.control & TDES1_LS) { +- tulip_tx(s, &desc); ++ if (!tulip_copy_tx_buffers(s, &desc)) { ++ if (desc.control & TDES1_LS) { ++ tulip_tx(s, &desc); ++ } + } + } + tulip_desc_write(s, s->current_tx_desc, &desc); +-- +1.8.3.1 + -- cgit v1.2.3-54-g00ecf