[v1] arm64/fpsimd: Fix use after free in SME when changing SVE VL

[PATCH 0/3] arm64/fpsimd: Fix use after free in SME when changing SVE VL

Mark Brown posted 3 patches 2 years, 7 months ago

Diff against v2
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There is a newer version of this series

arch/arm64/kernel/fpsimd.c                    |  32 +++++--
tools/testing/selftests/arm64/fp/vec-syscfg.c | 127 +++++++++++++++++++++++++-
2 files changed, 148 insertions(+), 11 deletions(-)

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[PATCH 0/3] arm64/fpsimd: Fix use after free in SME when changing SVE VL

Posted by Mark Brown 2 years, 7 months ago

This series fixes an issue which David Spickett found where if we change
the SVE VL while SME is in use we can end up attempting to save state to
an unallocated buffer and adds testing coverage for that plus a bit more
coverage of VL changes, just for paranioa.

Signed-off-by: Mark Brown <broonie@kernel.org>
---
Mark Brown (3):
      arm64/fpsimd: Ensure SME storage is allocated after SVE VL changes
      kselftest/arm64: Add a test case for SVE VL changes with SME active
      kselftest/arm64: Validate that changing one VL type does not affect another

 arch/arm64/kernel/fpsimd.c                    |  32 +++++--
 tools/testing/selftests/arm64/fp/vec-syscfg.c | 127 +++++++++++++++++++++++++-
 2 files changed, 148 insertions(+), 11 deletions(-)
---
base-commit: 06c2afb862f9da8dc5efa4b6076a0e48c3fbaaa5
change-id: 20230713-arm64-fix-sve-sme-vl-change-60eb1fa6a707

Best regards,
-- 
Mark Brown <broonie@kernel.org>