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-rw-r--r--system/xen/dom0/config-4.4.13-xen.i486 (renamed from system/xen/dom0/config-4.4.6-xen.i486)4
-rw-r--r--system/xen/dom0/config-4.4.13-xen.x86_64 (renamed from system/xen/dom0/config-4.4.6-xen.x86_64)4
-rw-r--r--system/xen/dom0/kernel-xen.sh2
-rw-r--r--system/xen/domU/domU.sh2
-rw-r--r--system/xen/patches/xsa173-4.6.patch244
-rw-r--r--system/xen/patches/xsa176.patch45
-rw-r--r--system/xen/patches/xsa179-qemuu-4.6-0001-vga-fix-banked-access-bounds-checking-CVE-2016-3710.patch108
-rw-r--r--system/xen/patches/xsa179-qemuu-4.6-0002-vga-add-vbe_enabled-helper.patch68
-rw-r--r--system/xen/patches/xsa179-qemuu-4.6-0003-vga-factor-out-vga-register-setup.patch127
-rw-r--r--system/xen/patches/xsa179-qemuu-4.6-0004-vga-update-vga-register-setup-on-vbe-changes.patch29
-rw-r--r--system/xen/patches/xsa179-qemuu-4.6-0005-vga-make-sure-vga-register-setup-for-vbe-stays-intac.patch75
-rw-r--r--system/xen/patches/xsa181.patch38
-rw-r--r--system/xen/xen.SlackBuild8
13 files changed, 745 insertions, 9 deletions
diff --git a/system/xen/dom0/config-4.4.6-xen.i486 b/system/xen/dom0/config-4.4.13-xen.i486
index 2a4aa7b4d5..1a6f8d66c2 100644
--- a/system/xen/dom0/config-4.4.6-xen.i486
+++ b/system/xen/dom0/config-4.4.13-xen.i486
@@ -1,6 +1,6 @@
#
# Automatically generated file; DO NOT EDIT.
-# Linux/x86 4.4.6 Kernel Configuration
+# Linux/x86 4.4.13 Kernel Configuration
#
# CONFIG_64BIT is not set
CONFIG_X86_32=y
@@ -1932,7 +1932,7 @@ CONFIG_SENSORS_APDS990X=m
CONFIG_HMC6352=m
CONFIG_DS1682=m
CONFIG_VMWARE_BALLOON=m
-CONFIG_BMP085=y
+CONFIG_BMP085=m
CONFIG_BMP085_I2C=m
CONFIG_PCH_PHUB=m
CONFIG_USB_SWITCH_FSA9480=m
diff --git a/system/xen/dom0/config-4.4.6-xen.x86_64 b/system/xen/dom0/config-4.4.13-xen.x86_64
index bce697b53b..a6abb06d55 100644
--- a/system/xen/dom0/config-4.4.6-xen.x86_64
+++ b/system/xen/dom0/config-4.4.13-xen.x86_64
@@ -1,6 +1,6 @@
#
# Automatically generated file; DO NOT EDIT.
-# Linux/x86 4.4.6 Kernel Configuration
+# Linux/x86 4.4.13 Kernel Configuration
#
CONFIG_64BIT=y
CONFIG_X86_64=y
@@ -1891,7 +1891,7 @@ CONFIG_SENSORS_APDS990X=m
CONFIG_HMC6352=m
CONFIG_DS1682=m
CONFIG_VMWARE_BALLOON=m
-CONFIG_BMP085=y
+CONFIG_BMP085=m
CONFIG_BMP085_I2C=m
CONFIG_USB_SWITCH_FSA9480=m
# CONFIG_SRAM is not set
diff --git a/system/xen/dom0/kernel-xen.sh b/system/xen/dom0/kernel-xen.sh
index 7596c3d6f1..df9903dc24 100644
--- a/system/xen/dom0/kernel-xen.sh
+++ b/system/xen/dom0/kernel-xen.sh
@@ -5,7 +5,7 @@
# Written by Chris Abela <chris.abela@maltats.com>, 20100515
# Modified by Mario Preksavec <mario@slackware.hr>
-KERNEL=${KERNEL:-4.4.6}
+KERNEL=${KERNEL:-4.4.13}
XEN=${XEN:-4.6.1}
BOOTLOADER=${BOOTLOADER:-lilo}
diff --git a/system/xen/domU/domU.sh b/system/xen/domU/domU.sh
index f1f7525c14..0f85ff648a 100644
--- a/system/xen/domU/domU.sh
+++ b/system/xen/domU/domU.sh
@@ -7,7 +7,7 @@
set -e
-KERNEL=${KERNEL:-4.4.6}
+KERNEL=${KERNEL:-4.4.13}
# Build an image for the root file system and another for the swap
# Default values : 8GB and 500MB resepectively.
diff --git a/system/xen/patches/xsa173-4.6.patch b/system/xen/patches/xsa173-4.6.patch
new file mode 100644
index 0000000000..aecf120c74
--- /dev/null
+++ b/system/xen/patches/xsa173-4.6.patch
@@ -0,0 +1,244 @@
+commit 54a4651cb4e744960fb375ed99909d7dfb943caf
+Author: Tim Deegan <tim@xen.org>
+Date: Wed Mar 16 16:51:27 2016 +0000
+
+ x86: limit GFNs to 32 bits for shadowed superpages.
+
+ Superpage shadows store the shadowed GFN in the backpointer field,
+ which for non-BIGMEM builds is 32 bits wide. Shadowing a superpage
+ mapping of a guest-physical address above 2^44 would lead to the GFN
+ being truncated there, and a crash when we come to remove the shadow
+ from the hash table.
+
+ Track the valid width of a GFN for each guest, including reporting it
+ through CPUID, and enforce it in the shadow pagetables. Set the
+ maximum witth to 32 for guests where this truncation could occur.
+
+ This is XSA-173.
+
+ Signed-off-by: Tim Deegan <tim@xen.org>
+ Signed-off-by: Jan Beulich <jbeulich@suse.com>
+
+Reported-by: Ling Liu <liuling-it@360.cn>
+diff --git a/xen/arch/x86/cpu/common.c b/xen/arch/x86/cpu/common.c
+index 35ef21b..528c283 100644
+--- a/xen/arch/x86/cpu/common.c
++++ b/xen/arch/x86/cpu/common.c
+@@ -38,6 +38,7 @@ integer_param("cpuid_mask_ext_edx", opt_cpuid_mask_ext_edx);
+ const struct cpu_dev *__read_mostly cpu_devs[X86_VENDOR_NUM] = {};
+
+ unsigned int paddr_bits __read_mostly = 36;
++unsigned int hap_paddr_bits __read_mostly = 36;
+
+ /*
+ * Default host IA32_CR_PAT value to cover all memory types.
+@@ -211,7 +212,7 @@ static void __init early_cpu_detect(void)
+
+ static void __cpuinit generic_identify(struct cpuinfo_x86 *c)
+ {
+- u32 tfms, capability, excap, ebx;
++ u32 tfms, capability, excap, ebx, eax;
+
+ /* Get vendor name */
+ cpuid(0x00000000, &c->cpuid_level,
+@@ -248,8 +249,11 @@ static void __cpuinit generic_identify(struct cpuinfo_x86 *c)
+ }
+ if ( c->extended_cpuid_level >= 0x80000004 )
+ get_model_name(c); /* Default name */
+- if ( c->extended_cpuid_level >= 0x80000008 )
+- paddr_bits = cpuid_eax(0x80000008) & 0xff;
++ if ( c->extended_cpuid_level >= 0x80000008 ) {
++ eax = cpuid_eax(0x80000008);
++ paddr_bits = eax & 0xff;
++ hap_paddr_bits = ((eax >> 16) & 0xff) ?: paddr_bits;
++ }
+ }
+
+ /* Might lift BIOS max_leaf=3 limit. */
+diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
+index e200aab..0b4d9f0 100644
+--- a/xen/arch/x86/hvm/hvm.c
++++ b/xen/arch/x86/hvm/hvm.c
+@@ -4567,8 +4567,7 @@ void hvm_cpuid(unsigned int input, unsigned int *eax, unsigned int *ebx,
+ break;
+
+ case 0x80000008:
+- count = cpuid_eax(0x80000008);
+- count = (count >> 16) & 0xff ?: count & 0xff;
++ count = d->arch.paging.gfn_bits + PAGE_SHIFT;
+ if ( (*eax & 0xff) > count )
+ *eax = (*eax & ~0xff) | count;
+
+diff --git a/xen/arch/x86/mm/guest_walk.c b/xen/arch/x86/mm/guest_walk.c
+index 773454d..06543d3 100644
+--- a/xen/arch/x86/mm/guest_walk.c
++++ b/xen/arch/x86/mm/guest_walk.c
+@@ -93,6 +93,12 @@ void *map_domain_gfn(struct p2m_domain *p2m, gfn_t gfn, mfn_t *mfn,
+ struct page_info *page;
+ void *map;
+
++ if ( gfn_x(gfn) >> p2m->domain->arch.paging.gfn_bits )
++ {
++ *rc = _PAGE_INVALID_BIT;
++ return NULL;
++ }
++
+ /* Translate the gfn, unsharing if shared */
+ page = get_page_from_gfn_p2m(p2m->domain, p2m, gfn_x(gfn), p2mt, NULL,
+ q);
+@@ -326,20 +332,8 @@ guest_walk_tables(struct vcpu *v, struct p2m_domain *p2m,
+ flags &= ~_PAGE_PAT;
+
+ if ( gfn_x(start) & GUEST_L2_GFN_MASK & ~0x1 )
+- {
+-#if GUEST_PAGING_LEVELS == 2
+- /*
+- * Note that _PAGE_INVALID_BITS is zero in this case, yielding a
+- * no-op here.
+- *
+- * Architecturally, the walk should fail if bit 21 is set (others
+- * aren't being checked at least in PSE36 mode), but we'll ignore
+- * this here in order to avoid specifying a non-natural, non-zero
+- * _PAGE_INVALID_BITS value just for that case.
+- */
+-#endif
+ rc |= _PAGE_INVALID_BITS;
+- }
++
+ /* Increment the pfn by the right number of 4k pages.
+ * Mask out PAT and invalid bits. */
+ start = _gfn((gfn_x(start) & ~GUEST_L2_GFN_MASK) +
+@@ -422,5 +416,11 @@ set_ad:
+ put_page(mfn_to_page(mfn_x(gw->l1mfn)));
+ }
+
++ /* If this guest has a restricted physical address space then the
++ * target GFN must fit within it. */
++ if ( !(rc & _PAGE_PRESENT)
++ && gfn_x(guest_l1e_get_gfn(gw->l1e)) >> d->arch.paging.gfn_bits )
++ rc |= _PAGE_INVALID_BITS;
++
+ return rc;
+ }
+diff --git a/xen/arch/x86/mm/hap/hap.c b/xen/arch/x86/mm/hap/hap.c
+index 6eb2167..f3475c6 100644
+--- a/xen/arch/x86/mm/hap/hap.c
++++ b/xen/arch/x86/mm/hap/hap.c
+@@ -448,6 +448,8 @@ void hap_domain_init(struct domain *d)
+ {
+ INIT_PAGE_LIST_HEAD(&d->arch.paging.hap.freelist);
+
++ d->arch.paging.gfn_bits = hap_paddr_bits - PAGE_SHIFT;
++
+ /* Use HAP logdirty mechanism. */
+ paging_log_dirty_init(d, hap_enable_log_dirty,
+ hap_disable_log_dirty,
+diff --git a/xen/arch/x86/mm/shadow/common.c b/xen/arch/x86/mm/shadow/common.c
+index bad8360..98d0d2c 100644
+--- a/xen/arch/x86/mm/shadow/common.c
++++ b/xen/arch/x86/mm/shadow/common.c
+@@ -51,6 +51,16 @@ int shadow_domain_init(struct domain *d, unsigned int domcr_flags)
+ INIT_PAGE_LIST_HEAD(&d->arch.paging.shadow.freelist);
+ INIT_PAGE_LIST_HEAD(&d->arch.paging.shadow.pinned_shadows);
+
++ d->arch.paging.gfn_bits = paddr_bits - PAGE_SHIFT;
++#ifndef CONFIG_BIGMEM
++ /*
++ * Shadowed superpages store GFNs in 32-bit page_info fields.
++ * Note that we cannot use guest_supports_superpages() here.
++ */
++ if ( !is_pv_domain(d) || opt_allow_superpage )
++ d->arch.paging.gfn_bits = 32;
++#endif
++
+ /* Use shadow pagetables for log-dirty support */
+ paging_log_dirty_init(d, sh_enable_log_dirty,
+ sh_disable_log_dirty, sh_clean_dirty_bitmap);
+diff --git a/xen/arch/x86/mm/shadow/multi.c b/xen/arch/x86/mm/shadow/multi.c
+index 43c9488..71477fe 100644
+--- a/xen/arch/x86/mm/shadow/multi.c
++++ b/xen/arch/x86/mm/shadow/multi.c
+@@ -525,7 +525,8 @@ _sh_propagate(struct vcpu *v,
+ ASSERT(GUEST_PAGING_LEVELS > 3 || level != 3);
+
+ /* Check there's something for the shadows to map to */
+- if ( !p2m_is_valid(p2mt) && !p2m_is_grant(p2mt) )
++ if ( (!p2m_is_valid(p2mt) && !p2m_is_grant(p2mt))
++ || gfn_x(target_gfn) >> d->arch.paging.gfn_bits )
+ {
+ *sp = shadow_l1e_empty();
+ goto done;
+diff --git a/xen/include/asm-x86/domain.h b/xen/include/asm-x86/domain.h
+index c6c6e71..74c3a52 100644
+--- a/xen/include/asm-x86/domain.h
++++ b/xen/include/asm-x86/domain.h
+@@ -193,6 +193,9 @@ struct paging_domain {
+ /* log dirty support */
+ struct log_dirty_domain log_dirty;
+
++ /* Number of valid bits in a gfn. */
++ unsigned int gfn_bits;
++
+ /* preemption handling */
+ struct {
+ const struct domain *dom;
+diff --git a/xen/include/asm-x86/guest_pt.h b/xen/include/asm-x86/guest_pt.h
+index f8a0d76..b5db401 100644
+--- a/xen/include/asm-x86/guest_pt.h
++++ b/xen/include/asm-x86/guest_pt.h
+@@ -210,15 +210,17 @@ guest_supports_nx(struct vcpu *v)
+ }
+
+
+-/* Some bits are invalid in any pagetable entry. */
+-#if GUEST_PAGING_LEVELS == 2
+-#define _PAGE_INVALID_BITS (0)
+-#elif GUEST_PAGING_LEVELS == 3
+-#define _PAGE_INVALID_BITS \
+- get_pte_flags(((1ull<<63) - 1) & ~((1ull<<paddr_bits) - 1))
+-#else /* GUEST_PAGING_LEVELS == 4 */
++/*
++ * Some bits are invalid in any pagetable entry.
++ * Normal flags values get represented in 24-bit values (see
++ * get_pte_flags() and put_pte_flags()), so set bit 24 in
++ * addition to be able to flag out of range frame numbers.
++ */
++#if GUEST_PAGING_LEVELS == 3
+ #define _PAGE_INVALID_BITS \
+- get_pte_flags(((1ull<<52) - 1) & ~((1ull<<paddr_bits) - 1))
++ (_PAGE_INVALID_BIT | get_pte_flags(((1ull << 63) - 1) & ~(PAGE_SIZE - 1)))
++#else /* 2-level and 4-level */
++#define _PAGE_INVALID_BITS _PAGE_INVALID_BIT
+ #endif
+
+
+diff --git a/xen/include/asm-x86/processor.h b/xen/include/asm-x86/processor.h
+index f507f5e..a200470 100644
+--- a/xen/include/asm-x86/processor.h
++++ b/xen/include/asm-x86/processor.h
+@@ -212,6 +212,8 @@ extern u32 cpuid_ext_features;
+
+ /* Maximum width of physical addresses supported by the hardware */
+ extern unsigned int paddr_bits;
++/* Max physical address width supported within HAP guests */
++extern unsigned int hap_paddr_bits;
+
+ extern const struct x86_cpu_id *x86_match_cpu(const struct x86_cpu_id table[]);
+
+diff --git a/xen/include/asm-x86/x86_64/page.h b/xen/include/asm-x86/x86_64/page.h
+index 19ab4d0..eb5e2fd 100644
+--- a/xen/include/asm-x86/x86_64/page.h
++++ b/xen/include/asm-x86/x86_64/page.h
+@@ -141,6 +141,12 @@ typedef l4_pgentry_t root_pgentry_t;
+ #define _PAGE_GNTTAB (1U<<22)
+
+ /*
++ * Bit 24 of a 24-bit flag mask! This is not any bit of a real pte,
++ * and is only used for signalling in variables that contain flags.
++ */
++#define _PAGE_INVALID_BIT (1U<<24)
++
++/*
+ * Bit 12 of a 24-bit flag mask. This corresponds to bit 52 of a pte.
+ * This is needed to distinguish between user and kernel PTEs since _PAGE_USER
+ * is asserted for both.
diff --git a/system/xen/patches/xsa176.patch b/system/xen/patches/xsa176.patch
new file mode 100644
index 0000000000..1c15abd3e3
--- /dev/null
+++ b/system/xen/patches/xsa176.patch
@@ -0,0 +1,45 @@
+x86/mm: fully honor PS bits in guest page table walks
+
+In L4 entries it is currently unconditionally reserved (and hence
+should, when set, always result in a reserved bit page fault), and is
+reserved on hardware not supporting 1Gb pages (and hence should, when
+set, similarly cause a reserved bit page fault on such hardware).
+
+This is CVE-2016-4480 / XSA-176.
+
+Signed-off-by: Jan Beulich <jbeulich@suse.com>
+Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
+Tested-by: Andrew Cooper <andrew.cooper3@citrix.com>
+
+--- a/xen/arch/x86/mm/guest_walk.c
++++ b/xen/arch/x86/mm/guest_walk.c
+@@ -226,6 +226,11 @@ guest_walk_tables(struct vcpu *v, struct
+ rc |= _PAGE_PRESENT;
+ goto out;
+ }
++ if ( gflags & _PAGE_PSE )
++ {
++ rc |= _PAGE_PSE | _PAGE_INVALID_BIT;
++ goto out;
++ }
+ rc |= ((gflags & mflags) ^ mflags);
+
+ /* Map the l3 table */
+@@ -247,7 +252,7 @@ guest_walk_tables(struct vcpu *v, struct
+ }
+ rc |= ((gflags & mflags) ^ mflags);
+
+- pse1G = (gflags & _PAGE_PSE) && guest_supports_1G_superpages(v);
++ pse1G = !!(gflags & _PAGE_PSE);
+
+ if ( pse1G )
+ {
+@@ -267,6 +272,8 @@ guest_walk_tables(struct vcpu *v, struct
+ /* _PAGE_PSE_PAT not set: remove _PAGE_PAT from flags. */
+ flags &= ~_PAGE_PAT;
+
++ if ( !guest_supports_1G_superpages(v) )
++ rc |= _PAGE_PSE | _PAGE_INVALID_BIT;
+ if ( gfn_x(start) & GUEST_L3_GFN_MASK & ~0x1 )
+ rc |= _PAGE_INVALID_BITS;
+
diff --git a/system/xen/patches/xsa179-qemuu-4.6-0001-vga-fix-banked-access-bounds-checking-CVE-2016-3710.patch b/system/xen/patches/xsa179-qemuu-4.6-0001-vga-fix-banked-access-bounds-checking-CVE-2016-3710.patch
new file mode 100644
index 0000000000..3ad3cf4327
--- /dev/null
+++ b/system/xen/patches/xsa179-qemuu-4.6-0001-vga-fix-banked-access-bounds-checking-CVE-2016-3710.patch
@@ -0,0 +1,108 @@
+From b16db5ab2d0c5ff755e08942f4c8e8f9f8618eae Mon Sep 17 00:00:00 2001
+From: Gerd Hoffmann <kraxel@redhat.com>
+Date: Tue, 26 Apr 2016 08:49:10 +0200
+Subject: [PATCH 1/5] vga: fix banked access bounds checking (CVE-2016-3710)
+
+vga allows banked access to video memory using the window at 0xa00000
+and it supports a different access modes with different address
+calculations.
+
+The VBE bochs extentions support banked access too, using the
+VBE_DISPI_INDEX_BANK register. The code tries to take the different
+address calculations into account and applies different limits to
+VBE_DISPI_INDEX_BANK depending on the current access mode.
+
+Which is probably effective in stopping misprogramming by accident.
+But from a security point of view completely useless as an attacker
+can easily change access modes after setting the bank register.
+
+Drop the bogus check, add range checks to vga_mem_{readb,writeb}
+instead.
+
+Fixes: CVE-2016-3710
+Reported-by: Qinghao Tang <luodalongde@gmail.com>
+Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
+Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
+---
+ hw/display/vga.c | 24 ++++++++++++++++++------
+ 1 file changed, 18 insertions(+), 6 deletions(-)
+
+diff --git a/hw/display/vga.c b/hw/display/vga.c
+index 52eaf05..b577712 100644
+--- a/hw/display/vga.c
++++ b/hw/display/vga.c
+@@ -178,6 +178,7 @@ static void vga_update_memory_access(VGACommonState *s)
+ break;
+ }
+ base += isa_mem_base;
++ assert(offset + size <= s->vram_size);
+ memory_region_init_alias(&s->chain4_alias, memory_region_owner(&s->vram),
+ "vga.chain4", &s->vram, offset, size);
+ memory_region_add_subregion_overlap(s->legacy_address_space, base,
+@@ -715,11 +716,7 @@ void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val)
+ vbe_fixup_regs(s);
+ break;
+ case VBE_DISPI_INDEX_BANK:
+- if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4) {
+- val &= (s->vbe_bank_mask >> 2);
+- } else {
+- val &= s->vbe_bank_mask;
+- }
++ val &= s->vbe_bank_mask;
+ s->vbe_regs[s->vbe_index] = val;
+ s->bank_offset = (val << 16);
+ vga_update_memory_access(s);
+@@ -818,13 +815,21 @@ uint32_t vga_mem_readb(VGACommonState *s, hwaddr addr)
+
+ if (s->sr[VGA_SEQ_MEMORY_MODE] & VGA_SR04_CHN_4M) {
+ /* chain 4 mode : simplest access */
++ assert(addr < s->vram_size);
+ ret = s->vram_ptr[addr];
+ } else if (s->gr[VGA_GFX_MODE] & 0x10) {
+ /* odd/even mode (aka text mode mapping) */
+ plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1);
+- ret = s->vram_ptr[((addr & ~1) << 1) | plane];
++ addr = ((addr & ~1) << 1) | plane;
++ if (addr >= s->vram_size) {
++ return 0xff;
++ }
++ ret = s->vram_ptr[addr];
+ } else {
+ /* standard VGA latched access */
++ if (addr * sizeof(uint32_t) >= s->vram_size) {
++ return 0xff;
++ }
+ s->latch = ((uint32_t *)s->vram_ptr)[addr];
+
+ if (!(s->gr[VGA_GFX_MODE] & 0x08)) {
+@@ -881,6 +886,7 @@ void vga_mem_writeb(VGACommonState *s, hwaddr addr, uint32_t val)
+ plane = addr & 3;
+ mask = (1 << plane);
+ if (s->sr[VGA_SEQ_PLANE_WRITE] & mask) {
++ assert(addr < s->vram_size);
+ s->vram_ptr[addr] = val;
+ #ifdef DEBUG_VGA_MEM
+ printf("vga: chain4: [0x" TARGET_FMT_plx "]\n", addr);
+@@ -894,6 +900,9 @@ void vga_mem_writeb(VGACommonState *s, hwaddr addr, uint32_t val)
+ mask = (1 << plane);
+ if (s->sr[VGA_SEQ_PLANE_WRITE] & mask) {
+ addr = ((addr & ~1) << 1) | plane;
++ if (addr >= s->vram_size) {
++ return;
++ }
+ s->vram_ptr[addr] = val;
+ #ifdef DEBUG_VGA_MEM
+ printf("vga: odd/even: [0x" TARGET_FMT_plx "]\n", addr);
+@@ -967,6 +976,9 @@ void vga_mem_writeb(VGACommonState *s, hwaddr addr, uint32_t val)
+ mask = s->sr[VGA_SEQ_PLANE_WRITE];
+ s->plane_updated |= mask; /* only used to detect font change */
+ write_mask = mask16[mask];
++ if (addr * sizeof(uint32_t) >= s->vram_size) {
++ return;
++ }
+ ((uint32_t *)s->vram_ptr)[addr] =
+ (((uint32_t *)s->vram_ptr)[addr] & ~write_mask) |
+ (val & write_mask);
+--
+1.9.1
+
diff --git a/system/xen/patches/xsa179-qemuu-4.6-0002-vga-add-vbe_enabled-helper.patch b/system/xen/patches/xsa179-qemuu-4.6-0002-vga-add-vbe_enabled-helper.patch
new file mode 100644
index 0000000000..0daa3141eb
--- /dev/null
+++ b/system/xen/patches/xsa179-qemuu-4.6-0002-vga-add-vbe_enabled-helper.patch
@@ -0,0 +1,68 @@
+From e026859e9aecf8635daf06e9fc2325239f458959 Mon Sep 17 00:00:00 2001
+From: Gerd Hoffmann <kraxel@redhat.com>
+Date: Tue, 26 Apr 2016 14:11:34 +0200
+Subject: [PATCH 2/5] vga: add vbe_enabled() helper
+
+Makes code a bit easier to read.
+
+Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
+Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
+---
+ hw/display/vga.c | 13 +++++++++----
+ 1 file changed, 9 insertions(+), 4 deletions(-)
+
+diff --git a/hw/display/vga.c b/hw/display/vga.c
+index b577712..ebf63ff 100644
+--- a/hw/display/vga.c
++++ b/hw/display/vga.c
+@@ -140,6 +140,11 @@ static uint32_t expand4[256];
+ static uint16_t expand2[256];
+ static uint8_t expand4to8[16];
+
++static inline bool vbe_enabled(VGACommonState *s)
++{
++ return s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED;
++}
++
+ static void vga_update_memory_access(VGACommonState *s)
+ {
+ hwaddr base, offset, size;
+@@ -563,7 +568,7 @@ static void vbe_fixup_regs(VGACommonState *s)
+ uint16_t *r = s->vbe_regs;
+ uint32_t bits, linelength, maxy, offset;
+
+- if (!(r[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED)) {
++ if (!vbe_enabled(s)) {
+ /* vbe is turned off -- nothing to do */
+ return;
+ }
+@@ -1057,7 +1062,7 @@ static void vga_get_offsets(VGACommonState *s,
+ {
+ uint32_t start_addr, line_offset, line_compare;
+
+- if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED) {
++ if (vbe_enabled(s)) {
+ line_offset = s->vbe_line_offset;
+ start_addr = s->vbe_start_addr;
+ line_compare = 65535;
+@@ -1382,7 +1387,7 @@ static int vga_get_bpp(VGACommonState *s)
+ {
+ int ret;
+
+- if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED) {
++ if (vbe_enabled(s)) {
+ ret = s->vbe_regs[VBE_DISPI_INDEX_BPP];
+ } else {
+ ret = 0;
+@@ -1394,7 +1399,7 @@ static void vga_get_resolution(VGACommonState *s, int *pwidth, int *pheight)
+ {
+ int width, height;
+
+- if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED) {
++ if (vbe_enabled(s)) {
+ width = s->vbe_regs[VBE_DISPI_INDEX_XRES];
+ height = s->vbe_regs[VBE_DISPI_INDEX_YRES];
+ } else {
+--
+1.9.1
+
diff --git a/system/xen/patches/xsa179-qemuu-4.6-0003-vga-factor-out-vga-register-setup.patch b/system/xen/patches/xsa179-qemuu-4.6-0003-vga-factor-out-vga-register-setup.patch
new file mode 100644
index 0000000000..70e4bdbca8
--- /dev/null
+++ b/system/xen/patches/xsa179-qemuu-4.6-0003-vga-factor-out-vga-register-setup.patch
@@ -0,0 +1,127 @@
+From b36a4e26caf7a050a6e8593527c26bfa4f47a758 Mon Sep 17 00:00:00 2001
+From: Gerd Hoffmann <kraxel@redhat.com>
+Date: Tue, 26 Apr 2016 15:24:18 +0200
+Subject: [PATCH 3/5] vga: factor out vga register setup
+
+When enabling vbe mode qemu will setup a bunch of vga registers to make
+sure the vga emulation operates in correct mode for a linear
+framebuffer. Move that code to a separate function so we can call it
+from other places too.
+
+Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
+Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
+---
+ hw/display/vga.c | 78 ++++++++++++++++++++++++++++++++------------------------
+ 1 file changed, 44 insertions(+), 34 deletions(-)
+
+diff --git a/hw/display/vga.c b/hw/display/vga.c
+index ebf63ff..fb822f4 100644
+--- a/hw/display/vga.c
++++ b/hw/display/vga.c
+@@ -643,6 +643,49 @@ static void vbe_fixup_regs(VGACommonState *s)
+ s->vbe_start_addr = offset / 4;
+ }
+
++/* we initialize the VGA graphic mode */
++static void vbe_update_vgaregs(VGACommonState *s)
++{
++ int h, shift_control;
++
++ if (!vbe_enabled(s)) {
++ /* vbe is turned off -- nothing to do */
++ return;
++ }
++
++ /* graphic mode + memory map 1 */
++ s->gr[VGA_GFX_MISC] = (s->gr[VGA_GFX_MISC] & ~0x0c) | 0x04 |
++ VGA_GR06_GRAPHICS_MODE;
++ s->cr[VGA_CRTC_MODE] |= 3; /* no CGA modes */
++ s->cr[VGA_CRTC_OFFSET] = s->vbe_line_offset >> 3;
++ /* width */
++ s->cr[VGA_CRTC_H_DISP] =
++ (s->vbe_regs[VBE_DISPI_INDEX_XRES] >> 3) - 1;
++ /* height (only meaningful if < 1024) */
++ h = s->vbe_regs[VBE_DISPI_INDEX_YRES] - 1;
++ s->cr[VGA_CRTC_V_DISP_END] = h;
++ s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x42) |
++ ((h >> 7) & 0x02) | ((h >> 3) & 0x40);
++ /* line compare to 1023 */
++ s->cr[VGA_CRTC_LINE_COMPARE] = 0xff;
++ s->cr[VGA_CRTC_OVERFLOW] |= 0x10;
++ s->cr[VGA_CRTC_MAX_SCAN] |= 0x40;
++
++ if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4) {
++ shift_control = 0;
++ s->sr[VGA_SEQ_CLOCK_MODE] &= ~8; /* no double line */
++ } else {
++ shift_control = 2;
++ /* set chain 4 mode */
++ s->sr[VGA_SEQ_MEMORY_MODE] |= VGA_SR04_CHN_4M;
++ /* activate all planes */
++ s->sr[VGA_SEQ_PLANE_WRITE] |= VGA_SR02_ALL_PLANES;
++ }
++ s->gr[VGA_GFX_MODE] = (s->gr[VGA_GFX_MODE] & ~0x60) |
++ (shift_control << 5);
++ s->cr[VGA_CRTC_MAX_SCAN] &= ~0x9f; /* no double scan */
++}
++
+ static uint32_t vbe_ioport_read_index(void *opaque, uint32_t addr)
+ {
+ VGACommonState *s = opaque;
+@@ -729,52 +772,19 @@ void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val)
+ case VBE_DISPI_INDEX_ENABLE:
+ if ((val & VBE_DISPI_ENABLED) &&
+ !(s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED)) {
+- int h, shift_control;
+
+ s->vbe_regs[VBE_DISPI_INDEX_VIRT_WIDTH] = 0;
+ s->vbe_regs[VBE_DISPI_INDEX_X_OFFSET] = 0;
+ s->vbe_regs[VBE_DISPI_INDEX_Y_OFFSET] = 0;
+ s->vbe_regs[VBE_DISPI_INDEX_ENABLE] |= VBE_DISPI_ENABLED;
+ vbe_fixup_regs(s);
++ vbe_update_vgaregs(s);
+
+ /* clear the screen */
+ if (!(val & VBE_DISPI_NOCLEARMEM)) {
+ memset(s->vram_ptr, 0,
+ s->vbe_regs[VBE_DISPI_INDEX_YRES] * s->vbe_line_offset);
+ }
+-
+- /* we initialize the VGA graphic mode */
+- /* graphic mode + memory map 1 */
+- s->gr[VGA_GFX_MISC] = (s->gr[VGA_GFX_MISC] & ~0x0c) | 0x04 |
+- VGA_GR06_GRAPHICS_MODE;
+- s->cr[VGA_CRTC_MODE] |= 3; /* no CGA modes */
+- s->cr[VGA_CRTC_OFFSET] = s->vbe_line_offset >> 3;
+- /* width */
+- s->cr[VGA_CRTC_H_DISP] =
+- (s->vbe_regs[VBE_DISPI_INDEX_XRES] >> 3) - 1;
+- /* height (only meaningful if < 1024) */
+- h = s->vbe_regs[VBE_DISPI_INDEX_YRES] - 1;
+- s->cr[VGA_CRTC_V_DISP_END] = h;
+- s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x42) |
+- ((h >> 7) & 0x02) | ((h >> 3) & 0x40);
+- /* line compare to 1023 */
+- s->cr[VGA_CRTC_LINE_COMPARE] = 0xff;
+- s->cr[VGA_CRTC_OVERFLOW] |= 0x10;
+- s->cr[VGA_CRTC_MAX_SCAN] |= 0x40;
+-
+- if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4) {
+- shift_control = 0;
+- s->sr[VGA_SEQ_CLOCK_MODE] &= ~8; /* no double line */
+- } else {
+- shift_control = 2;
+- /* set chain 4 mode */
+- s->sr[VGA_SEQ_MEMORY_MODE] |= VGA_SR04_CHN_4M;
+- /* activate all planes */
+- s->sr[VGA_SEQ_PLANE_WRITE] |= VGA_SR02_ALL_PLANES;
+- }
+- s->gr[VGA_GFX_MODE] = (s->gr[VGA_GFX_MODE] & ~0x60) |
+- (shift_control << 5);
+- s->cr[VGA_CRTC_MAX_SCAN] &= ~0x9f; /* no double scan */
+ } else {
+ s->bank_offset = 0;
+ }
+--
+1.9.1
+
diff --git a/system/xen/patches/xsa179-qemuu-4.6-0004-vga-update-vga-register-setup-on-vbe-changes.patch b/system/xen/patches/xsa179-qemuu-4.6-0004-vga-update-vga-register-setup-on-vbe-changes.patch
new file mode 100644
index 0000000000..0638edb91b
--- /dev/null
+++ b/system/xen/patches/xsa179-qemuu-4.6-0004-vga-update-vga-register-setup-on-vbe-changes.patch
@@ -0,0 +1,29 @@
+From ef8bd1b26a597ae7c306227655626640093cb7a2 Mon Sep 17 00:00:00 2001
+From: Gerd Hoffmann <kraxel@redhat.com>
+Date: Tue, 26 Apr 2016 15:39:22 +0200
+Subject: [PATCH 4/5] vga: update vga register setup on vbe changes
+
+Call the new vbe_update_vgaregs() function on vbe configuration
+changes, to make sure vga registers are up-to-date.
+
+Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
+Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
+---
+ hw/display/vga.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/hw/display/vga.c b/hw/display/vga.c
+index fb822f4..3739758 100644
+--- a/hw/display/vga.c
++++ b/hw/display/vga.c
+@@ -762,6 +762,7 @@ void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val)
+ case VBE_DISPI_INDEX_Y_OFFSET:
+ s->vbe_regs[s->vbe_index] = val;
+ vbe_fixup_regs(s);
++ vbe_update_vgaregs(s);
+ break;
+ case VBE_DISPI_INDEX_BANK:
+ val &= s->vbe_bank_mask;
+--
+1.9.1
+
diff --git a/system/xen/patches/xsa179-qemuu-4.6-0005-vga-make-sure-vga-register-setup-for-vbe-stays-intac.patch b/system/xen/patches/xsa179-qemuu-4.6-0005-vga-make-sure-vga-register-setup-for-vbe-stays-intac.patch
new file mode 100644
index 0000000000..c22f2d7195
--- /dev/null
+++ b/system/xen/patches/xsa179-qemuu-4.6-0005-vga-make-sure-vga-register-setup-for-vbe-stays-intac.patch
@@ -0,0 +1,75 @@
+From 92456c0c361d5da858d544647c6246ec78ed922b Mon Sep 17 00:00:00 2001
+From: Gerd Hoffmann <kraxel@redhat.com>
+Date: Tue, 26 Apr 2016 14:48:06 +0200
+Subject: [PATCH 5/5] vga: make sure vga register setup for vbe stays intact
+ (CVE-2016-3712).
+
+Call vbe_update_vgaregs() when the guest touches GFX, SEQ or CRT
+registers, to make sure the vga registers will always have the
+values needed by vbe mode. This makes sure the sanity checks
+applied by vbe_fixup_regs() are effective.
+
+Without this guests can muck with shift_control, can turn on planar
+vga modes or text mode emulation while VBE is active, making qemu
+take code paths meant for CGA compatibility, but with the very
+large display widths and heigts settable using VBE registers.
+
+Which is good for one or another buffer overflow. Not that
+critical as they typically read overflows happening somewhere
+in the display code. So guests can DoS by crashing qemu with a
+segfault, but it is probably not possible to break out of the VM.
+
+Fixes: CVE-2016-3712
+Reported-by: Zuozhi Fzz <zuozhi.fzz@alibaba-inc.com>
+Reported-by: P J P <ppandit@redhat.com>
+Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
+Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
+---
+ hw/display/vga.c | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/hw/display/vga.c b/hw/display/vga.c
+index 3739758..e7be97e 100644
+--- a/hw/display/vga.c
++++ b/hw/display/vga.c
+@@ -140,6 +140,8 @@ static uint32_t expand4[256];
+ static uint16_t expand2[256];
+ static uint8_t expand4to8[16];
+
++static void vbe_update_vgaregs(VGACommonState *s);
++
+ static inline bool vbe_enabled(VGACommonState *s)
+ {
+ return s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED;
+@@ -483,6 +485,7 @@ void vga_ioport_write(void *opaque, uint32_t addr, uint32_t val)
+ printf("vga: write SR%x = 0x%02x\n", s->sr_index, val);
+ #endif
+ s->sr[s->sr_index] = val & sr_mask[s->sr_index];
++ vbe_update_vgaregs(s);
+ if (s->sr_index == VGA_SEQ_CLOCK_MODE) {
+ s->update_retrace_info(s);
+ }
+@@ -514,6 +517,7 @@ void vga_ioport_write(void *opaque, uint32_t addr, uint32_t val)
+ printf("vga: write GR%x = 0x%02x\n", s->gr_index, val);
+ #endif
+ s->gr[s->gr_index] = val & gr_mask[s->gr_index];
++ vbe_update_vgaregs(s);
+ vga_update_memory_access(s);
+ break;
+ case VGA_CRT_IM:
+@@ -532,10 +536,12 @@ void vga_ioport_write(void *opaque, uint32_t addr, uint32_t val)
+ if (s->cr_index == VGA_CRTC_OVERFLOW) {
+ s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x10) |
+ (val & 0x10);
++ vbe_update_vgaregs(s);
+ }
+ return;
+ }
+ s->cr[s->cr_index] = val;
++ vbe_update_vgaregs(s);
+
+ switch(s->cr_index) {
+ case VGA_CRTC_H_TOTAL:
+--
+1.9.1
+
diff --git a/system/xen/patches/xsa181.patch b/system/xen/patches/xsa181.patch
new file mode 100644
index 0000000000..c44541ec4d
--- /dev/null
+++ b/system/xen/patches/xsa181.patch
@@ -0,0 +1,38 @@
+From ee488e2133e581967d13d5287d7bd654e9b2e2a6 Mon Sep 17 00:00:00 2001
+From: Andrew Cooper <andrew.cooper3@citrix.com>
+Date: Thu, 2 Jun 2016 14:19:00 +0100
+Subject: [PATCH] xen/arm: Don't free p2m->root in p2m_teardown() before it has
+ been allocated
+
+If p2m_init() didn't complete successfully, (e.g. due to VMID
+exhaustion), p2m_teardown() is called and unconditionally tries to free
+p2m->root before it has been allocated. free_domheap_pages() doesn't
+tolerate NULL pointers.
+
+This is XSA-181
+
+Reported-by: Aaron Cornelius <Aaron.Cornelius@dornerworks.com>
+Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
+Reviewed-by: Jan Beulich <jbeulich@suse.com>
+Reviewed-by: Julien Grall <julien.grall@arm.com>
+---
+ xen/arch/arm/p2m.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c
+index 838d004..6a19c57 100644
+--- a/xen/arch/arm/p2m.c
++++ b/xen/arch/arm/p2m.c
+@@ -1408,7 +1408,8 @@ void p2m_teardown(struct domain *d)
+ while ( (pg = page_list_remove_head(&p2m->pages)) )
+ free_domheap_page(pg);
+
+- free_domheap_pages(p2m->root, P2M_ROOT_ORDER);
++ if ( p2m->root )
++ free_domheap_pages(p2m->root, P2M_ROOT_ORDER);
+
+ p2m->root = NULL;
+
+--
+2.1.4
+
diff --git a/system/xen/xen.SlackBuild b/system/xen/xen.SlackBuild
index 91d44d50c2..eda99df380 100644
--- a/system/xen/xen.SlackBuild
+++ b/system/xen/xen.SlackBuild
@@ -24,9 +24,11 @@
PRGNAM=xen
VERSION=${VERSION:-4.6.1}
-BUILD=${BUILD:-1}
+BUILD=${BUILD:-2}
TAG=${TAG:-_SBo}
+SEABIOS=${SEABIOS:-1.8.2}
+
if [ -z "$ARCH" ]; then
case "$( uname -m )" in
i?86) ARCH=i486 ;;
@@ -120,8 +122,8 @@ cp $CWD/ipxe-git-9a93db3f0947484e30e753bbd61a10b17336e20e.tar.gz \
tools/firmware/etherboot/_ipxe.tar.gz
(
cd tools/firmware
- tar -xf $CWD/seabios-1.8.2.tar.gz
- mv seabios-1.8.2 seabios-dir-remote
+ tar -xf $CWD/seabios-$SEABIOS.tar.gz
+ mv seabios-$SEABIOS seabios-dir-remote
ln -s seabios-dir-remote seabios-dir
)
cp $CWD/{lwip,zlib,newlib,pciutils,grub,gmp,tpm_emulator}-*.tar.?z* \
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-23 02:04:28 +0000