diff options
| author | Quentin Perret <qperret@google.com> | 2021-10-05 10:01:42 +0100 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2021-10-05 13:02:54 +0100 |
| commit | 7615c2a514788559c6684234b8fc27f3a843c2c6 (patch) | |
| tree | 874d1721abc8e9d1ae97942d6376d994e3081b99 /arch/arm64/kvm/hyp/nvhe/page_alloc.c | |
| parent | 1d58a17ef54599506d44c45ac95be27273a4d2b1 (diff) | |
KVM: arm64: Report corrupted refcount at EL2
Some of the refcount manipulation helpers used at EL2 are instrumented
to catch a corrupted state, but not all of them are treated equally. Let's
make things more consistent by instrumenting hyp_page_ref_dec_and_test()
as well.
Acked-by: Will Deacon <will@kernel.org>
Suggested-by: Will Deacon <will@kernel.org>
Signed-off-by: Quentin Perret <qperret@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211005090155.734578-6-qperret@google.com
Diffstat (limited to 'arch/arm64/kvm/hyp/nvhe/page_alloc.c')
| -rw-r--r-- | arch/arm64/kvm/hyp/nvhe/page_alloc.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/kvm/hyp/nvhe/page_alloc.c b/arch/arm64/kvm/hyp/nvhe/page_alloc.c index a6e874e61a40..0bd7701ad1df 100644 --- a/arch/arm64/kvm/hyp/nvhe/page_alloc.c +++ b/arch/arm64/kvm/hyp/nvhe/page_alloc.c @@ -152,6 +152,7 @@ static inline void hyp_page_ref_inc(struct hyp_page *p) static inline int hyp_page_ref_dec_and_test(struct hyp_page *p) { + BUG_ON(!p->refcount); p->refcount--; return (p->refcount == 0); } |