KVM: arm64: Fix hyp_trace_desc allocation size in hyp_trace_load()

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The footprint calculated for struct hyp_trace_desc sizes only
trace_buffer_desc and do not take into account the other fields. It
worked so far thanks to the follow-up PAGE_ALIGN().

Fix the descriptor size and while at it, enforce an overflow check after
PAGE_ALIGN().

Reported-by: Sashiko <sashiko-bot@kernel.org>
Fixes: 3aed038aac ("KVM: arm64: Add trace remote for the nVHE/pKVM hyp")
Signed-off-by: Vincent Donnefort <vdonnefort@google.com>
Reviewed-by: Fuad Tabba <fuad.tabba@linux.dev>
Tested-by: Fuad Tabba <fuad.tabba@linux.dev>
Link: https://patch.msgid.link/20260710114819.2689386-3-vdonnefort@google.com
Signed-off-by: Marc Zyngier <maz@kernel.org>

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Vincent Donnefort 2026-07-10 12:48:19 +01:00 • committed by Marc Zyngier

parent df7a9d376f

commit ca28278d10

1 changed files with 7 additions and 3 deletions

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arch/arm64/kvm/hyp_trace.c

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