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authorHitendra Prajapati <hprajapati@mvista.com>2022-07-27 13:25:44 +0530
committerSteve Sakoman <steve@sakoman.com>2022-07-27 07:01:24 -1000
commit7c3043df56b3090138fe56f8c06df5ca08cafd26 (patch)
tree51c3b4242bf3c76d27647284399613cf23da13dc
parent191db3c58b52fa7c8530d82f7e3e3b24075fdeb4 (diff)
downloadopenembedded-core-7c3043df56b3090138fe56f8c06df5ca08cafd26.tar.gz
qemu: CVE-2022-35414 can perform an uninitialized read on the translate_fail path, leading to an io_readx or io_writex crash
Source: https://github.com/qemu/qemu MR: 119832 Type: Security Fix Disposition: Backport from https://github.com/qemu/qemu/commit/418ade7849ce7641c0f7333718caf5091a02fd4c ChangeID: 1246afd7bb950d2d5fe2e198961797c0fa14ac00 Description: CVE-2022-35414 qemu: can perform an uninitialized read on the translate_fail path, leading to an io_readx or io_writex crash. Signed-off-by: Hitendra Prajapati <hprajapati@mvista.com> Signed-off-by: Steve Sakoman <steve@sakoman.com>
-rw-r--r--meta/recipes-devtools/qemu/qemu.inc1
-rw-r--r--meta/recipes-devtools/qemu/qemu/CVE-2022-35414.patch53
2 files changed, 54 insertions, 0 deletions
diff --git a/meta/recipes-devtools/qemu/qemu.inc b/meta/recipes-devtools/qemu/qemu.inc
index 4135619fc6..10b4280b23 100644
--- a/meta/recipes-devtools/qemu/qemu.inc
+++ b/meta/recipes-devtools/qemu/qemu.inc
@@ -98,6 +98,7 @@ SRC_URI = "https://download.qemu.org/${BPN}-${PV}.tar.xz \
file://CVE-2020-13253_4.patch \
file://CVE-2020-13253_5.patch \
file://CVE-2020-13791.patch \
+ file://CVE-2022-35414.patch \
"
UPSTREAM_CHECK_REGEX = "qemu-(?P<pver>\d+(\.\d+)+)\.tar"
diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2022-35414.patch b/meta/recipes-devtools/qemu/qemu/CVE-2022-35414.patch
new file mode 100644
index 0000000000..4196ebcf98
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/CVE-2022-35414.patch
@@ -0,0 +1,53 @@
+From 09a07b5b39c87423df9e8f6574c19a14d36beac5 Mon Sep 17 00:00:00 2001
+From: Hitendra Prajapati <hprajapati@mvista.com>
+Date: Wed, 27 Jul 2022 10:34:12 +0530
+Subject: [PATCH] CVE-2022-35414
+
+Upstream-Status: Backport [https://github.com/qemu/qemu/commit/418ade7849ce7641c0f7333718caf5091a02fd4c]
+CVE: CVE-2022-35414
+Signed-off-by: Hitendra Prajapati <hprajapati@mvista.com>
+---
+ exec.c | 13 ++++++++++++-
+ 1 file changed, 12 insertions(+), 1 deletion(-)
+
+diff --git a/exec.c b/exec.c
+index 43c70ffb..2d6add46 100644
+--- a/exec.c
++++ b/exec.c
+@@ -685,7 +685,7 @@ static void tcg_iommu_free_notifier_list(CPUState *cpu)
+
+ /* Called from RCU critical section */
+ MemoryRegionSection *
+-address_space_translate_for_iotlb(CPUState *cpu, int asidx, hwaddr addr,
++address_space_translate_for_iotlb(CPUState *cpu, int asidx, hwaddr orig_addr,
+ hwaddr *xlat, hwaddr *plen,
+ MemTxAttrs attrs, int *prot)
+ {
+@@ -694,6 +694,7 @@ address_space_translate_for_iotlb(CPUState *cpu, int asidx, hwaddr addr,
+ IOMMUMemoryRegionClass *imrc;
+ IOMMUTLBEntry iotlb;
+ int iommu_idx;
++ hwaddr addr = orig_addr;
+ AddressSpaceDispatch *d = atomic_rcu_read(&cpu->cpu_ases[asidx].memory_dispatch);
+
+ for (;;) {
+@@ -737,6 +738,16 @@ address_space_translate_for_iotlb(CPUState *cpu, int asidx, hwaddr addr,
+ return section;
+
+ translate_fail:
++ /*
++ * We should be given a page-aligned address -- certainly
++ * tlb_set_page_with_attrs() does so. The page offset of xlat
++ * is used to index sections[], and PHYS_SECTION_UNASSIGNED = 0.
++ * The page portion of xlat will be logged by memory_region_access_valid()
++ * when this memory access is rejected, so use the original untranslated
++ * physical address.
++ */
++ assert((orig_addr & ~TARGET_PAGE_MASK) == 0);
++ *xlat = orig_addr;
+ return &d->map.sections[PHYS_SECTION_UNASSIGNED];
+ }
+ #endif
+--
+2.25.1
+