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![]() Cortex-A510's erratum #2077057 causes SPSR_EL2 to be corrupted when
single-stepping authenticated ERET instructions. A single step is
expected, but a pointer authentication trap is taken instead. The
erratum causes SPSR_EL1 to be copied to SPSR_EL2, which could allow
EL1 to cause a return to EL2 with a guest controlled ELR_EL2.
Because the conditions require an ERET into active-not-pending state,
this is only a problem for the EL2 when EL2 is stepping EL1. In this case
the previous SPSR_EL2 value is preserved in struct kvm_vcpu, and can be
restored.
Cc: stable@vger.kernel.org #
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.. | ||
acpi_object_usage.rst | ||
amu.rst | ||
arm-acpi.rst | ||
asymmetric-32bit.rst | ||
booting.rst | ||
cpu-feature-registers.rst | ||
elf_hwcaps.rst | ||
features.rst | ||
hugetlbpage.rst | ||
index.rst | ||
kasan-offsets.sh | ||
legacy_instructions.rst | ||
memory-tagging-extension.rst | ||
memory.rst | ||
perf.rst | ||
pointer-authentication.rst | ||
silicon-errata.rst | ||
sve.rst | ||
tagged-address-abi.rst | ||
tagged-pointers.rst |