KVM: arm64: Check the untrusted offset in FF-A memory share

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commit 103e17aac0 upstream.

Verify the offset to prevent OOB access in the hypervisor
FF-A buffer in case an untrusted large enough value
[U32_MAX - sizeof(struct ffa_composite_mem_region) + 1, U32_MAX]
is set from the host kernel.

Signed-off-by: Sebastian Ene <sebastianene@google.com>
Acked-by: Will Deacon <will@kernel.org>
Link: https://patch.msgid.link/20251017075710.2605118-1-sebastianene@google.com
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Sebastian Ene 2025-10-17 07:57:10 +00:00 • committed by Greg Kroah-Hartman

parent d5dc97879a

commit bc1909ef38

1 changed files with 7 additions and 2 deletions

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arch/arm64/kvm/hyp/nvhe/ffa.c

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