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| author | Marc Zyngier <maz@kernel.org> | 2021-06-24 14:21:05 +0100 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2021-06-24 14:54:45 +0100 |
| commit | 98db7259fa7b963d80da49fd636744e28a78981e (patch) | |
| tree | 716432fd9008d5731c96be932db5af0bdb4b524e /tools/perf/scripts/python/exported-sql-viewer.py | |
| parent | 04c02c201d7e8149ae336ead69fb64e4e6f94bc9 (diff) | |
| download | lwn-98db7259fa7b963d80da49fd636744e28a78981e.tar.gz lwn-98db7259fa7b963d80da49fd636744e28a78981e.zip | |
KVM: arm64: Set the MTE tag bit before releasing the page
Setting a page flag without holding a reference to the page
is living dangerously. In the tag-writing path, we drop the
reference to the page by calling kvm_release_pfn_dirty(),
and only then set the PG_mte_tagged bit.
It would be safer to do it the other way round.
Fixes: f0376edb1ddca ("KVM: arm64: Add ioctl to fetch/store tags in a guest")
Cc: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/87k0mjidwb.wl-maz@kernel.org
Diffstat (limited to 'tools/perf/scripts/python/exported-sql-viewer.py')
0 files changed, 0 insertions, 0 deletions