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| author | David Brazdil <dbrazdil@google.com> | 2021-07-28 18:32:31 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-08-18 10:07:03 +0300 |
| commit | f3409e925da2315c298d7b5966de7b383e4633db (patch) | |
| tree | 651d6bef8ca213ce0286f5670cc14f9a4bdd21e8 /arch/arm64/kvm | |
| parent | 14034883d0587b4e2f63f6386d34bacd22cf1740 (diff) | |
| download | linux-f3409e925da2315c298d7b5966de7b383e4633db.tar.xz | |
KVM: arm64: Fix off-by-one in range_is_memory
[ Upstream commit facee1be7689f8cf573b9ffee6a5c28ee193615e ]
Hyp checks whether an address range only covers RAM by checking the
start/endpoints against a list of memblock_region structs. However,
the endpoint here is exclusive but internally is treated as inclusive.
Fix the off-by-one error that caused valid address ranges to be
rejected.
Cc: Quentin Perret <qperret@google.com>
Fixes: 90134ac9cabb6 ("KVM: arm64: Protect the .hyp sections from the host")
Signed-off-by: David Brazdil <dbrazdil@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210728153232.1018911-2-dbrazdil@google.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch/arm64/kvm')
| -rw-r--r-- | arch/arm64/kvm/hyp/nvhe/mem_protect.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/kvm/hyp/nvhe/mem_protect.c b/arch/arm64/kvm/hyp/nvhe/mem_protect.c index 4b60c0056c04..fa1b77fe629d 100644 --- a/arch/arm64/kvm/hyp/nvhe/mem_protect.c +++ b/arch/arm64/kvm/hyp/nvhe/mem_protect.c @@ -190,7 +190,7 @@ static bool range_is_memory(u64 start, u64 end) { struct kvm_mem_range r1, r2; - if (!find_mem_range(start, &r1) || !find_mem_range(end, &r2)) + if (!find_mem_range(start, &r1) || !find_mem_range(end - 1, &r2)) return false; if (r1.start != r2.start) return false; |