[kirkstone][PATCH 1/5] qemu: fix CVE-2021-3507

[kirkstone][PATCH 1/5] qemu: fix CVE-2021-3507

[Sakib Sajal]

Backport relevant patches to fix CVE-2021-3507.

Signed-off-by: Sakib Sajal <sakib.sajal@windriver.com>
---
 meta/recipes-devtools/qemu/qemu.inc           |   2 +
 .../qemu/qemu/CVE-2021-3507_1.patch           |  92 ++++++++++++++
 .../qemu/qemu/CVE-2021-3507_2.patch           | 115 ++++++++++++++++++
 3 files changed, 209 insertions(+)
 create mode 100644 meta/recipes-devtools/qemu/qemu/CVE-2021-3507_1.patch
 create mode 100644 meta/recipes-devtools/qemu/qemu/CVE-2021-3507_2.patch

diff --git a/meta/recipes-devtools/qemu/qemu.inc b/meta/recipes-devtools/qemu/qemu.inc
index 54a68e1730..dd30313fdd 100644
--- a/meta/recipes-devtools/qemu/qemu.inc
+++ b/meta/recipes-devtools/qemu/qemu.inc
@@ -36,6 +36,8 @@ SRC_URI = "https://download.qemu.org/${BPN}-${PV}.tar.xz \
            file://CVE-2021-4206.patch \
            file://CVE-2021-4207.patch \
            file://CVE-2022-35414.patch \
+           file://CVE-2021-3507_1.patch \
+           file://CVE-2021-3507_2.patch \
            "
 UPSTREAM_CHECK_REGEX = "qemu-(?P<pver>\d+(\.\d+)+)\.tar"
 
diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2021-3507_1.patch b/meta/recipes-devtools/qemu/qemu/CVE-2021-3507_1.patch
new file mode 100644
index 0000000000..4201610f4d
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/CVE-2021-3507_1.patch
@@ -0,0 +1,92 @@
+From 963ac2cd5186b28fbfdecd15ac43afe1dbaf871a Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= <philmd@redhat.com>
+Date: Thu, 18 Nov 2021 12:57:32 +0100
+Subject: [PATCH 1/2] hw/block/fdc: Prevent end-of-track overrun
+ (CVE-2021-3507)
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Per the 82078 datasheet, if the end-of-track (EOT byte in
+the FIFO) is more than the number of sectors per side, the
+command is terminated unsuccessfully:
+
+* 5.2.5 DATA TRANSFER TERMINATION
+
+  The 82078 supports terminal count explicitly through
+  the TC pin and implicitly through the underrun/over-
+  run and end-of-track (EOT) functions. For full sector
+  transfers, the EOT parameter can define the last
+  sector to be transferred in a single or multisector
+  transfer. If the last sector to be transferred is a par-
+  tial sector, the host can stop transferring the data in
+  mid-sector, and the 82078 will continue to complete
+  the sector as if a hardware TC was received. The
+  only difference between these implicit functions and
+  TC is that they return "abnormal termination" result
+  status. Such status indications can be ignored if they
+  were expected.
+
+* 6.1.3 READ TRACK
+
+  This command terminates when the EOT specified
+  number of sectors have been read. If the 82078
+  does not find an I D Address Mark on the diskette
+  after the second· occurrence of a pulse on the
+  INDX# pin, then it sets the IC code in Status Regis-
+  ter 0 to "01" (Abnormal termination), sets the MA bit
+  in Status Register 1 to "1", and terminates the com-
+  mand.
+
+* 6.1.6 VERIFY
+
+  Refer to Table 6-6 and Table 6-7 for information
+  concerning the values of MT and EC versus SC and
+  EOT value.
+
+* Table 6·6. Result Phase Table
+
+* Table 6-7. Verify Command Result Phase Table
+
+Fix by aborting the transfer when EOT > # Sectors Per Side.
+
+Cc: qemu-stable@nongnu.org
+Cc: Hervé Poussineau <hpoussin@reactos.org>
+Fixes: baca51faff0 ("floppy driver: disk geometry auto detect")
+Reported-by: Alexander Bulekov <alxndr@bu.edu>
+Resolves: https://gitlab.com/qemu-project/qemu/-/issues/339
+Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
+Message-Id: <20211118115733.4038610-2-philmd@redhat.com>
+Reviewed-by: Hanna Reitz <hreitz@redhat.com>
+Signed-off-by: Kevin Wolf <kwolf@redhat.com>
+
+Upstream-Status: Backport [defac5e2fbddf8423a354ff0454283a2115e1367]
+CVE: CVE-2021-3507
+
+Signed-off-by: Sakib Sajal <sakib.sajal@windriver.com>
+---
+ hw/block/fdc.c | 8 ++++++++
+ 1 file changed, 8 insertions(+)
+
+diff --git a/hw/block/fdc.c b/hw/block/fdc.c
+index 21d18ac2e..24b05406e 100644
+--- a/hw/block/fdc.c
++++ b/hw/block/fdc.c
+@@ -1529,6 +1529,14 @@ static void fdctrl_start_transfer(FDCtrl *fdctrl, int direction)
+         int tmp;
+         fdctrl->data_len = 128 << (fdctrl->fifo[5] > 7 ? 7 : fdctrl->fifo[5]);
+         tmp = (fdctrl->fifo[6] - ks + 1);
++        if (tmp < 0) {
++            FLOPPY_DPRINTF("invalid EOT: %d\n", tmp);
++            fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, 0x00);
++            fdctrl->fifo[3] = kt;
++            fdctrl->fifo[4] = kh;
++            fdctrl->fifo[5] = ks;
++            return;
++        }
+         if (fdctrl->fifo[0] & 0x80)
+             tmp += fdctrl->fifo[6];
+         fdctrl->data_len *= tmp;
+-- 
+2.33.0
+
diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2021-3507_2.patch b/meta/recipes-devtools/qemu/qemu/CVE-2021-3507_2.patch
new file mode 100644
index 0000000000..9f00d9c0d0
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/CVE-2021-3507_2.patch
@@ -0,0 +1,115 @@
+From ec5725982f811d9728ad1f9940df0e9349397e67 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= <philmd@redhat.com>
+Date: Thu, 18 Nov 2021 12:57:33 +0100
+Subject: [PATCH 2/2] tests/qtest/fdc-test: Add a regression test for
+ CVE-2021-3507
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Add the reproducer from https://gitlab.com/qemu-project/qemu/-/issues/339
+
+Without the previous commit, when running 'make check-qtest-i386'
+with QEMU configured with '--enable-sanitizers' we get:
+
+  ==4028352==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x619000062a00 at pc 0x5626d03c491a bp 0x7ffdb4199410 sp 0x7ffdb4198bc0
+  READ of size 786432 at 0x619000062a00 thread T0
+      #0 0x5626d03c4919 in __asan_memcpy (qemu-system-i386+0x1e65919)
+      #1 0x5626d1c023cc in flatview_write_continue softmmu/physmem.c:2787:13
+      #2 0x5626d1bf0c0f in flatview_write softmmu/physmem.c:2822:14
+      #3 0x5626d1bf0798 in address_space_write softmmu/physmem.c:2914:18
+      #4 0x5626d1bf0f37 in address_space_rw softmmu/physmem.c:2924:16
+      #5 0x5626d1bf14c8 in cpu_physical_memory_rw softmmu/physmem.c:2933:5
+      #6 0x5626d0bd5649 in cpu_physical_memory_write include/exec/cpu-common.h:82:5
+      #7 0x5626d0bd0a07 in i8257_dma_write_memory hw/dma/i8257.c:452:9
+      #8 0x5626d09f825d in fdctrl_transfer_handler hw/block/fdc.c:1616:13
+      #9 0x5626d0a048b4 in fdctrl_start_transfer hw/block/fdc.c:1539:13
+      #10 0x5626d09f4c3e in fdctrl_write_data hw/block/fdc.c:2266:13
+      #11 0x5626d09f22f7 in fdctrl_write hw/block/fdc.c:829:9
+      #12 0x5626d1c20bc5 in portio_write softmmu/ioport.c:207:17
+
+  0x619000062a00 is located 0 bytes to the right of 512-byte region [0x619000062800,0x619000062a00)
+  allocated by thread T0 here:
+      #0 0x5626d03c66ec in posix_memalign (qemu-system-i386+0x1e676ec)
+      #1 0x5626d2b988d4 in qemu_try_memalign util/oslib-posix.c:210:11
+      #2 0x5626d2b98b0c in qemu_memalign util/oslib-posix.c:226:27
+      #3 0x5626d09fbaf0 in fdctrl_realize_common hw/block/fdc.c:2341:20
+      #4 0x5626d0a150ed in isabus_fdc_realize hw/block/fdc-isa.c:113:5
+      #5 0x5626d2367935 in device_set_realized hw/core/qdev.c:531:13
+
+  SUMMARY: AddressSanitizer: heap-buffer-overflow (qemu-system-i386+0x1e65919) in __asan_memcpy
+  Shadow bytes around the buggy address:
+    0x0c32800044f0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
+    0x0c3280004500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+    0x0c3280004510: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+    0x0c3280004520: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+    0x0c3280004530: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  =>0x0c3280004540:[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
+    0x0c3280004550: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
+    0x0c3280004560: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
+    0x0c3280004570: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
+    0x0c3280004580: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
+    0x0c3280004590: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
+  Shadow byte legend (one shadow byte represents 8 application bytes):
+    Addressable:           00
+    Heap left redzone:       fa
+    Freed heap region:       fd
+  ==4028352==ABORTING
+
+[ kwolf: Added snapshot=on to prevent write file lock failure ]
+
+Reported-by: Alexander Bulekov <alxndr@bu.edu>
+Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
+Reviewed-by: Alexander Bulekov <alxndr@bu.edu>
+Signed-off-by: Kevin Wolf <kwolf@redhat.com>
+
+Upstream-Status: Backport [46609b90d9e3a6304def11038a76b58ff43f77bc]
+CVE: CVE-2021-3507
+
+Signed-off-by: Sakib Sajal <sakib.sajal@windriver.com>
+---
+ tests/qtest/fdc-test.c | 21 +++++++++++++++++++++
+ 1 file changed, 21 insertions(+)
+
+diff --git a/tests/qtest/fdc-test.c b/tests/qtest/fdc-test.c
+index 8f6eee84a..6f5850354 100644
+--- a/tests/qtest/fdc-test.c
++++ b/tests/qtest/fdc-test.c
+@@ -583,6 +583,26 @@ static void test_cve_2021_20196(void)
+     qtest_quit(s);
+ }
+ 
++static void test_cve_2021_3507(void)
++{
++    QTestState *s;
++
++    s = qtest_initf("-nographic -m 32M -nodefaults "
++                    "-drive file=%s,format=raw,if=floppy,snapshot=on",
++                    test_image);
++    qtest_outl(s, 0x9, 0x0a0206);
++    qtest_outw(s, 0x3f4, 0x1600);
++    qtest_outw(s, 0x3f4, 0x0000);
++    qtest_outw(s, 0x3f4, 0x0000);
++    qtest_outw(s, 0x3f4, 0x0000);
++    qtest_outw(s, 0x3f4, 0x0200);
++    qtest_outw(s, 0x3f4, 0x0200);
++    qtest_outw(s, 0x3f4, 0x0000);
++    qtest_outw(s, 0x3f4, 0x0000);
++    qtest_outw(s, 0x3f4, 0x0000);
++    qtest_quit(s);
++}
++
+ int main(int argc, char **argv)
+ {
+     int fd;
+@@ -614,6 +634,7 @@ int main(int argc, char **argv)
+     qtest_add_func("/fdc/read_no_dma_19", test_read_no_dma_19);
+     qtest_add_func("/fdc/fuzz-registers", fuzz_registers);
+     qtest_add_func("/fdc/fuzz/cve_2021_20196", test_cve_2021_20196);
++    qtest_add_func("/fdc/fuzz/cve_2021_3507", test_cve_2021_3507);
+ 
+     ret = g_test_run();
+ 
+-- 
+2.33.0
+
-- 
2.33.0

[kirkstone][PATCH 2/5] qemu: fix CVE-2021-3929

[Sakib Sajal]

Backport patch to fix CVE-2021-3929.

Signed-off-by: Sakib Sajal <sakib.sajal@windriver.com>
---
 meta/recipes-devtools/qemu/qemu.inc           |  1 +
 .../qemu/qemu/CVE-2021-3929.patch             | 70 +++++++++++++++++++
 2 files changed, 71 insertions(+)
 create mode 100644 meta/recipes-devtools/qemu/qemu/CVE-2021-3929.patch

diff --git a/meta/recipes-devtools/qemu/qemu.inc b/meta/recipes-devtools/qemu/qemu.inc
index dd30313fdd..53bad5c453 100644
--- a/meta/recipes-devtools/qemu/qemu.inc
+++ b/meta/recipes-devtools/qemu/qemu.inc
@@ -38,6 +38,7 @@ SRC_URI = "https://download.qemu.org/${BPN}-${PV}.tar.xz \
            file://CVE-2022-35414.patch \
            file://CVE-2021-3507_1.patch \
            file://CVE-2021-3507_2.patch \
+           file://CVE-2021-3929.patch \
            "
 UPSTREAM_CHECK_REGEX = "qemu-(?P<pver>\d+(\.\d+)+)\.tar"
 
diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2021-3929.patch b/meta/recipes-devtools/qemu/qemu/CVE-2021-3929.patch
new file mode 100644
index 0000000000..7555e5bc40
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/CVE-2021-3929.patch
@@ -0,0 +1,70 @@
+From 12daeafc9868c1ebe482d580494f9e6d3d5c260f Mon Sep 17 00:00:00 2001
+From: Klaus Jensen <k.jensen@samsung.com>
+Date: Fri, 17 Dec 2021 10:44:01 +0100
+Subject: [PATCH] hw/nvme: fix CVE-2021-3929
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This fixes CVE-2021-3929 "locally" by denying DMA to the iomem of the
+device itself. This still allows DMA to MMIO regions of other devices
+(e.g. doing P2P DMA to the controller memory buffer of another NVMe
+device).
+
+Fixes: CVE-2021-3929
+Reported-by: Qiuhao Li <Qiuhao.Li@outlook.com>
+Reviewed-by: Keith Busch <kbusch@kernel.org>
+Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
+Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
+
+Upstream-Status: Backport [736b01642d85be832385063f278fe7cd4ffb5221]
+CVE: CVE-2021-3929
+
+Signed-off-by: Sakib Sajal <sakib.sajal@windriver.com>
+---
+ hw/nvme/ctrl.c | 22 ++++++++++++++++++++++
+ 1 file changed, 22 insertions(+)
+
+diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c
+index 5f573c417..eda52c6ac 100644
+--- a/hw/nvme/ctrl.c
++++ b/hw/nvme/ctrl.c
+@@ -357,6 +357,24 @@ static inline void *nvme_addr_to_pmr(NvmeCtrl *n, hwaddr addr)
+     return memory_region_get_ram_ptr(&n->pmr.dev->mr) + (addr - n->pmr.cba);
+ }
+ 
++static inline bool nvme_addr_is_iomem(NvmeCtrl *n, hwaddr addr)
++{
++    hwaddr hi, lo;
++
++    /*
++     * The purpose of this check is to guard against invalid "local" access to
++     * the iomem (i.e. controller registers). Thus, we check against the range
++     * covered by the 'bar0' MemoryRegion since that is currently composed of
++     * two subregions (the NVMe "MBAR" and the MSI-X table/pba). Note, however,
++     * that if the device model is ever changed to allow the CMB to be located
++     * in BAR0 as well, then this must be changed.
++     */
++    lo = n->bar0.addr;
++    hi = lo + int128_get64(n->bar0.size);
++
++    return addr >= lo && addr < hi;
++}
++
+ static int nvme_addr_read(NvmeCtrl *n, hwaddr addr, void *buf, int size)
+ {
+     hwaddr hi = addr + size - 1;
+@@ -614,6 +632,10 @@ static uint16_t nvme_map_addr(NvmeCtrl *n, NvmeSg *sg, hwaddr addr, size_t len)
+ 
+     trace_pci_nvme_map_addr(addr, len);
+ 
++    if (nvme_addr_is_iomem(n, addr)) {
++        return NVME_DATA_TRAS_ERROR;
++    }
++
+     if (nvme_addr_is_cmb(n, addr)) {
+         cmb = true;
+     } else if (nvme_addr_is_pmr(n, addr)) {
+-- 
+2.33.0
+
-- 
2.33.0

[kirkstone][PATCH 3/5] qemu: fix CVE-2021-4158

[Sakib Sajal]

Backport patch to fix CVE-2021-4158.

Signed-off-by: Sakib Sajal <sakib.sajal@windriver.com>
---
 meta/recipes-devtools/qemu/qemu.inc           |  1 +
 .../qemu/qemu/CVE-2021-4158.patch             | 46 +++++++++++++++++++
 2 files changed, 47 insertions(+)
 create mode 100644 meta/recipes-devtools/qemu/qemu/CVE-2021-4158.patch

diff --git a/meta/recipes-devtools/qemu/qemu.inc b/meta/recipes-devtools/qemu/qemu.inc
index 53bad5c453..1d04ad3c67 100644
--- a/meta/recipes-devtools/qemu/qemu.inc
+++ b/meta/recipes-devtools/qemu/qemu.inc
@@ -39,6 +39,7 @@ SRC_URI = "https://download.qemu.org/${BPN}-${PV}.tar.xz \
            file://CVE-2021-3507_1.patch \
            file://CVE-2021-3507_2.patch \
            file://CVE-2021-3929.patch \
+           file://CVE-2021-4158.patch \
            "
 UPSTREAM_CHECK_REGEX = "qemu-(?P<pver>\d+(\.\d+)+)\.tar"
 
diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2021-4158.patch b/meta/recipes-devtools/qemu/qemu/CVE-2021-4158.patch
new file mode 100644
index 0000000000..f6de53244f
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/CVE-2021-4158.patch
@@ -0,0 +1,46 @@
+From a0b64c6d078acb9bcfae600e22bf99a9a7deca7c Mon Sep 17 00:00:00 2001
+From: "Michael S. Tsirkin" <mst@redhat.com>
+Date: Tue, 21 Dec 2021 09:45:44 -0500
+Subject: [PATCH] acpi: validate hotplug selector on access
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+When bus is looked up on a pci write, we didn't
+validate that the lookup succeeded.
+Fuzzers thus can trigger QEMU crash by dereferencing the NULL
+bus pointer.
+
+Fixes: b32bd763a1 ("pci: introduce acpi-index property for PCI device")
+Fixes: CVE-2021-4158
+Cc: "Igor Mammedov" <imammedo@redhat.com>
+Fixes: https://gitlab.com/qemu-project/qemu/-/issues/770
+Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
+Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
+Reviewed-by: Ani Sinha <ani@anisinha.ca>
+
+Upstream-Status: Backport [9bd6565ccee68f72d5012e24646e12a1c662827e]
+CVE: CVE-2021-4158
+
+Signed-off-by: Sakib Sajal <sakib.sajal@windriver.com>
+---
+ hw/acpi/pcihp.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/hw/acpi/pcihp.c b/hw/acpi/pcihp.c
+index 30405b511..a5e182dd3 100644
+--- a/hw/acpi/pcihp.c
++++ b/hw/acpi/pcihp.c
+@@ -491,6 +491,9 @@ static void pci_write(void *opaque, hwaddr addr, uint64_t data,
+         }
+ 
+         bus = acpi_pcihp_find_hotplug_bus(s, s->hotplug_select);
++        if (!bus) {
++            break;
++        }
+         QTAILQ_FOREACH_SAFE(kid, &bus->qbus.children, sibling, next) {
+             Object *o = OBJECT(kid->child);
+             PCIDevice *dev = PCI_DEVICE(o);
+-- 
+2.33.0
+
-- 
2.33.0

[kirkstone][PATCH 4/5] qemu: fix CVE-2022-0358

[Sakib Sajal]

Backport patch to fix CVE-2022-0358.

Signed-off-by: Sakib Sajal <sakib.sajal@windriver.com>
---
 meta/recipes-devtools/qemu/qemu.inc           |   1 +
 .../qemu/qemu/CVE-2022-0358.patch             | 106 ++++++++++++++++++
 2 files changed, 107 insertions(+)
 create mode 100644 meta/recipes-devtools/qemu/qemu/CVE-2022-0358.patch

diff --git a/meta/recipes-devtools/qemu/qemu.inc b/meta/recipes-devtools/qemu/qemu.inc
index 1d04ad3c67..44d4c9ca2f 100644
--- a/meta/recipes-devtools/qemu/qemu.inc
+++ b/meta/recipes-devtools/qemu/qemu.inc
@@ -40,6 +40,7 @@ SRC_URI = "https://download.qemu.org/${BPN}-${PV}.tar.xz \
            file://CVE-2021-3507_2.patch \
            file://CVE-2021-3929.patch \
            file://CVE-2021-4158.patch \
+           file://CVE-2022-0358.patch \
            "
 UPSTREAM_CHECK_REGEX = "qemu-(?P<pver>\d+(\.\d+)+)\.tar"
 
diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2022-0358.patch b/meta/recipes-devtools/qemu/qemu/CVE-2022-0358.patch
new file mode 100644
index 0000000000..8eb1475638
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/CVE-2022-0358.patch
@@ -0,0 +1,106 @@
+From 4d2558ec9336d3614a43f7437c9cf74793ae3a87 Mon Sep 17 00:00:00 2001
+From: Vivek Goyal <vgoyal@redhat.com>
+Date: Tue, 25 Jan 2022 13:51:14 -0500
+Subject: [PATCH] virtiofsd: Drop membership of all supplementary groups
+ (CVE-2022-0358)
+
+At the start, drop membership of all supplementary groups. This is
+not required.
+
+If we have membership of "root" supplementary group and when we switch
+uid/gid using setresuid/setsgid, we still retain membership of existing
+supplemntary groups. And that can allow some operations which are not
+normally allowed.
+
+For example, if root in guest creates a dir as follows.
+
+$ mkdir -m 03777 test_dir
+
+This sets SGID on dir as well as allows unprivileged users to write into
+this dir.
+
+And now as unprivileged user open file as follows.
+
+$ su test
+$ fd = open("test_dir/priviledge_id", O_RDWR|O_CREAT|O_EXCL, 02755);
+
+This will create SGID set executable in test_dir/.
+
+And that's a problem because now an unpriviliged user can execute it,
+get egid=0 and get access to resources owned by "root" group. This is
+privilege escalation.
+
+Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=2044863
+Fixes: CVE-2022-0358
+Reported-by: JIETAO XIAO <shawtao1125@gmail.com>
+Suggested-by: Miklos Szeredi <mszeredi@redhat.com>
+Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
+Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
+Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
+Message-Id: <YfBGoriS38eBQrAb@redhat.com>
+Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
+  dgilbert: Fixed missing {}'s style nit
+
+Upstream-Status: Backport [449e8171f96a6a944d1f3b7d3627ae059eae21ca]
+CVE: CVE-2022-0358
+
+Signed-off-by: Sakib Sajal <sakib.sajal@windriver.com>
+---
+ tools/virtiofsd/passthrough_ll.c | 27 +++++++++++++++++++++++++++
+ 1 file changed, 27 insertions(+)
+
+diff --git a/tools/virtiofsd/passthrough_ll.c b/tools/virtiofsd/passthrough_ll.c
+index 64b5b4fbb..b3d0674f6 100644
+--- a/tools/virtiofsd/passthrough_ll.c
++++ b/tools/virtiofsd/passthrough_ll.c
+@@ -54,6 +54,7 @@
+ #include <sys/wait.h>
+ #include <sys/xattr.h>
+ #include <syslog.h>
++#include <grp.h>
+ 
+ #include "qemu/cutils.h"
+ #include "passthrough_helpers.h"
+@@ -1161,6 +1162,30 @@ static void lo_lookup(fuse_req_t req, fuse_ino_t parent, const char *name)
+ #define OURSYS_setresuid SYS_setresuid
+ #endif
+ 
++static void drop_supplementary_groups(void)
++{
++    int ret;
++
++    ret = getgroups(0, NULL);
++    if (ret == -1) {
++        fuse_log(FUSE_LOG_ERR, "getgroups() failed with error=%d:%s\n",
++                 errno, strerror(errno));
++        exit(1);
++    }
++
++    if (!ret) {
++        return;
++    }
++
++    /* Drop all supplementary groups. We should not need it */
++    ret = setgroups(0, NULL);
++    if (ret == -1) {
++        fuse_log(FUSE_LOG_ERR, "setgroups() failed with error=%d:%s\n",
++                 errno, strerror(errno));
++        exit(1);
++    }
++}
++
+ /*
+  * Change to uid/gid of caller so that file is created with
+  * ownership of caller.
+@@ -3926,6 +3951,8 @@ int main(int argc, char *argv[])
+ 
+     qemu_init_exec_dir(argv[0]);
+ 
++    drop_supplementary_groups();
++
+     pthread_mutex_init(&lo.mutex, NULL);
+     lo.inodes = g_hash_table_new(lo_key_hash, lo_key_equal);
+     lo.root.fd = -1;
+-- 
+2.33.0
+
-- 
2.33.0

[kirkstone][PATCH 5/5] qemu: fix CVE-2022-0216

[Sakib Sajal]

Backport relevant patches to fix CVE-2022-0216.

Signed-off-by: Sakib Sajal <sakib.sajal@windriver.com>
---
 meta/recipes-devtools/qemu/qemu.inc           |  2 +
 .../qemu/qemu/CVE-2022-0216_1.patch           | 42 +++++++++++++++
 .../qemu/qemu/CVE-2022-0216_2.patch           | 52 +++++++++++++++++++
 3 files changed, 96 insertions(+)
 create mode 100644 meta/recipes-devtools/qemu/qemu/CVE-2022-0216_1.patch
 create mode 100644 meta/recipes-devtools/qemu/qemu/CVE-2022-0216_2.patch

diff --git a/meta/recipes-devtools/qemu/qemu.inc b/meta/recipes-devtools/qemu/qemu.inc
index 44d4c9ca2f..a493ac8add 100644
--- a/meta/recipes-devtools/qemu/qemu.inc
+++ b/meta/recipes-devtools/qemu/qemu.inc
@@ -41,6 +41,8 @@ SRC_URI = "https://download.qemu.org/${BPN}-${PV}.tar.xz \
            file://CVE-2021-3929.patch \
            file://CVE-2021-4158.patch \
            file://CVE-2022-0358.patch \
+           file://CVE-2022-0216_1.patch \
+           file://CVE-2022-0216_2.patch \
            "
 UPSTREAM_CHECK_REGEX = "qemu-(?P<pver>\d+(\.\d+)+)\.tar"
 
diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2022-0216_1.patch b/meta/recipes-devtools/qemu/qemu/CVE-2022-0216_1.patch
new file mode 100644
index 0000000000..de7458fc72
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/CVE-2022-0216_1.patch
@@ -0,0 +1,42 @@
+From 1cedc914b2c4b4e0c9dfcd1b0e02917af35b5eb6 Mon Sep 17 00:00:00 2001
+From: Mauro Matteo Cascella <mcascell@redhat.com>
+Date: Tue, 5 Jul 2022 22:05:43 +0200
+Subject: [PATCH 1/3] scsi/lsi53c895a: fix use-after-free in lsi_do_msgout
+ (CVE-2022-0216)
+
+Set current_req->req to NULL to prevent reusing a free'd buffer in case of
+repeated SCSI cancel requests. Thanks to Thomas Huth for suggesting the patch.
+
+Fixes: CVE-2022-0216
+Resolves: https://gitlab.com/qemu-project/qemu/-/issues/972
+Signed-off-by: Mauro Matteo Cascella <mcascell@redhat.com>
+Reviewed-by: Thomas Huth <thuth@redhat.com>
+Message-Id: <20220705200543.2366809-1-mcascell@redhat.com>
+Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
+
+Upstream-Status: Backport [6c8fa961da5e60f574bb52fd3ad44b1e9e8ad4b8]
+CVE: CVE-2022-0216
+
+Signed-off-by: Sakib Sajal <sakib.sajal@windriver.com>
+---
+ hw/scsi/lsi53c895a.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/hw/scsi/lsi53c895a.c b/hw/scsi/lsi53c895a.c
+index 85e907a78..8033cf050 100644
+--- a/hw/scsi/lsi53c895a.c
++++ b/hw/scsi/lsi53c895a.c
+@@ -1029,8 +1029,9 @@ static void lsi_do_msgout(LSIState *s)
+         case 0x0d:
+             /* The ABORT TAG message clears the current I/O process only. */
+             trace_lsi_do_msgout_abort(current_tag);
+-            if (current_req) {
++            if (current_req && current_req->req) {
+                 scsi_req_cancel(current_req->req);
++                current_req->req = NULL;
+             }
+             lsi_disconnect(s);
+             break;
+-- 
+2.33.0
+
diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2022-0216_2.patch b/meta/recipes-devtools/qemu/qemu/CVE-2022-0216_2.patch
new file mode 100644
index 0000000000..12f5a602da
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/CVE-2022-0216_2.patch
@@ -0,0 +1,52 @@
+From 8f2c2cb908758192d5ebc00605cbf0989b8a507c Mon Sep 17 00:00:00 2001
+From: Mauro Matteo Cascella <mcascell@redhat.com>
+Date: Mon, 11 Jul 2022 14:33:16 +0200
+Subject: [PATCH 3/3] scsi/lsi53c895a: really fix use-after-free in
+ lsi_do_msgout (CVE-2022-0216)
+
+Set current_req to NULL, not current_req->req, to prevent reusing a free'd
+buffer in case of repeated SCSI cancel requests.  Also apply the fix to
+CLEAR QUEUE and BUS DEVICE RESET messages as well, since they also cancel
+the request.
+
+Thanks to Alexander Bulekov for providing a reproducer.
+
+Fixes: CVE-2022-0216
+Resolves: https://gitlab.com/qemu-project/qemu/-/issues/972
+Signed-off-by: Mauro Matteo Cascella <mcascell@redhat.com>
+Tested-by: Alexander Bulekov <alxndr@bu.edu>
+Message-Id: <20220711123316.421279-1-mcascell@redhat.com>
+Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
+
+Upstream-Status: Backport [4367a20cc442c56b05611b4224de9a61908f9eac]
+CVE: CVE-2022-0216
+
+Signed-off-by: Sakib Sajal <sakib.sajal@windriver.com>
+---
+ hw/scsi/lsi53c895a.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/hw/scsi/lsi53c895a.c b/hw/scsi/lsi53c895a.c
+index 8033cf050..fbe3fa3dd 100644
+--- a/hw/scsi/lsi53c895a.c
++++ b/hw/scsi/lsi53c895a.c
+@@ -1031,7 +1031,7 @@ static void lsi_do_msgout(LSIState *s)
+             trace_lsi_do_msgout_abort(current_tag);
+             if (current_req && current_req->req) {
+                 scsi_req_cancel(current_req->req);
+-                current_req->req = NULL;
++                current_req = NULL;
+             }
+             lsi_disconnect(s);
+             break;
+@@ -1057,6 +1057,7 @@ static void lsi_do_msgout(LSIState *s)
+             /* clear the current I/O process */
+             if (s->current) {
+                 scsi_req_cancel(s->current->req);
++                current_req = NULL;
+             }
+ 
+             /* As the current implemented devices scsi_disk and scsi_generic
+-- 
+2.33.0
+
-- 
2.33.0