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qemu-e2k/hw/i386
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Ross Lagerwall a021a2dd8b xen-mapcache: Avoid entry->lock overflow 
In some cases, a particular mapcache entry may be mapped 256 times
causing the lock field to wrap to 0. For example, this may happen when
using emulated NVME and the guest submits a large scatter-gather write.
At this point, the entry map be remapped causing QEMU to write the wrong
data or crash (since remap is not atomic).

Avoid this overflow by increasing the lock field to a uint32_t and also
detect it and abort rather than continuing regardless.

Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Reviewed-by: Paul Durrant <paul@xen.org>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Message-Id: <20220124104450.152481-1-ross.lagerwall@citrix.com>
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
 		2022-01-27 15:14:21 +00:00
..
kvm i386/kvm: Replace abs64() with uabs64() from host-utils 2021-09-29 19:37:38 +10:00
xen xen-mapcache: Avoid entry->lock overflow 2022-01-27 15:14:21 +00:00
Kconfig hw/i386/pc: Allow instantiating a virtio-iommu device 2021-11-01 18:49:10 -04:00
acpi-build.c acpi: tpm: Add missing device identification objects 2022-01-07 19:30:13 -05:00
acpi-build.h hw/acpi/ich9: Enable ACPI PCI hot-plug 2021-07-16 04:33:35 -04:00
acpi-common.c acpi: x86: madt: use build_append_int_noprefix() API to compose MADT table 2021-10-05 17:30:57 -04:00
acpi-common.h misc: Correct relative include path 2021-06-05 21:10:42 +02:00
acpi-microvm.c acpi: build_dsdt_microvm: use acpi_table_begin()/acpi_table_end() instead of build_header() 2021-10-05 17:30:57 -04:00
acpi-microvm.h microvm/acpi: add minimal acpi support 2020-09-17 14:16:19 +02:00
amd_iommu.c dma: Let dma_memory_read/write() take MemTxAttrs argument 2021-12-30 17:16:32 +01:00
amd_iommu.h Use OBJECT_DECLARE_SIMPLE_TYPE when possible 2020-09-18 14:12:32 -04:00
e820_memory_layout.c hw/i386/pc: Extract e820 memory layout code 2019-09-16 17:13:07 +02:00
e820_memory_layout.h hw/i386/pc: Extract e820 memory layout code 2019-09-16 17:13:07 +02:00
fw_cfg.c hw/i386/fw_cfg: Set SGX bits in feature control fw_cfg accordingly 2021-09-30 15:30:24 +02:00
fw_cfg.h acpi: factor out fw_cfg_add_acpi_dsdt() 2020-06-24 17:18:28 -04:00
generic_event_device_x86.c acpi: ged: add x86 device variant. 2020-09-17 14:16:19 +02:00
intel_iommu.c intel-iommu: correctly check passthrough during translation 2022-01-07 19:30:13 -05:00
intel_iommu_internal.h intel-iommu: ignore leaf SNP bit in scalable mode 2021-11-29 08:49:36 -05:00
kvmvapic.c Do not include cpu.h if it's not really necessary 2021-05-02 17:24:51 +02:00
meson.build microvm: add device tree support. 2021-11-02 17:24:17 +01:00
microvm-dt.c microvm: check g_file_set_contents() return value 2021-11-22 11:14:28 +01:00
microvm-dt.h microvm: add device tree support. 2021-11-02 17:24:17 +01:00
microvm.c * Build system fixes and cleanups 2021-11-03 13:07:30 -04:00
multiboot.c target/i386: use DMA-enabled multiboot ROM for new-enough QEMU machine types 2021-11-02 15:57:27 +01:00
multiboot.h target/i386: use DMA-enabled multiboot ROM for new-enough QEMU machine types 2021-11-02 15:57:27 +01:00
pc.c hw/i386/pc: Add missing property descriptions 2022-01-07 19:30:13 -05:00
pc_piix.c hw/i386: expose a "smbios-entry-point-type" PC machine property 2022-01-07 05:19:55 -05:00
pc_q35.c hw/i386: expose a "smbios-entry-point-type" PC machine property 2022-01-07 05:19:55 -05:00
pc_sysfw.c target/i386/sev: Declare system-specific functions in 'sev.h' 2021-10-13 10:47:49 +02:00
pc_sysfw_ovmf-stubs.c hw/i386: Introduce X86_FW_OVMF Kconfig symbol 2021-07-14 22:28:58 +02:00
pc_sysfw_ovmf.c hw/i386: Introduce X86_FW_OVMF Kconfig symbol 2021-07-14 22:28:58 +02:00
port92.c Use OBJECT_DECLARE_SIMPLE_TYPE when possible 2020-09-18 14:12:32 -04:00
sgx-epc.c numa: Enable numa for SGX EPC sections 2021-12-10 09:47:18 +01:00
sgx-stub.c numa: Enable numa for SGX EPC sections 2021-12-10 09:47:18 +01:00
sgx.c numa: Support SGX numa in the monitor and Libvirt interfaces 2021-12-10 09:47:18 +01:00
trace-events docs: fix references to docs/devel/tracing.rst 2021-06-02 06:51:09 +02:00
trace.h trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00
vmmouse.c hw/i386/vmmouse: Require 'i8042' property to be set 2021-12-18 10:57:37 +01:00
vmport.c Do not include cpu.h if it's not really necessary 2021-05-02 17:24:51 +02:00
x86-iommu-stub.c hw/i386/pc: Remove x86_iommu_get_type() 2021-11-01 18:49:10 -04:00
x86-iommu.c hw/i386/pc: Move IOMMU singleton into PCMachineState 2021-11-01 18:49:10 -04:00
x86.c target/i386: use DMA-enabled multiboot ROM for new-enough QEMU machine types 2021-11-02 15:57:27 +01:00