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

Message ID 20230713-arm64-fix-sve-sme-vl-change-v1-0-129dd8611413@kernel.org (mailing list archive)
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Series arm64/fpsimd: Fix use after free in SME when changing SVE VL | expand

Message

Mark Brown July 13, 2023, 8:06 p.m. UTC 
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,