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| author | Elena Reshetova <elena.reshetova@intel.com> | 2017-02-20 14:06:21 +0300 |
|---|---|---|
| committer | Radim Krčmář <rkrcmar@redhat.com> | 2017-03-01 19:03:21 +0300 |
| commit | e3736c3eb3a6f7c0966923b629c9f92b558aa9c7 (patch) | |
| tree | 850c343552afe4d498411ba1e767aff4b43f0163 /include/linux/kvm_host.h | |
| parent | bba82fd75694832b59433bf4e9d7ede8de1dfd42 (diff) | |
| download | linux-e3736c3eb3a6f7c0966923b629c9f92b558aa9c7.tar.xz | |
kvm: convert kvm.users_count from atomic_t to refcount_t
refcount_t type and corresponding API should be
used instead of atomic_t when the variable is used as
a reference counter. This allows to avoid accidental
refcounter overflows that might lead to use-after-free
situations.
Signed-off-by: Elena Reshetova <elena.reshetova@intel.com>
Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David Windsor <dwindsor@gmail.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Diffstat (limited to 'include/linux/kvm_host.h')
| -rw-r--r-- | include/linux/kvm_host.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 8d69d5150748..2c14ad9809da 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -26,6 +26,7 @@ #include <linux/context_tracking.h> #include <linux/irqbypass.h> #include <linux/swait.h> +#include <linux/refcount.h> #include <asm/signal.h> #include <linux/kvm.h> @@ -401,7 +402,7 @@ struct kvm { #endif struct kvm_vm_stat stat; struct kvm_arch arch; - atomic_t users_count; + refcount_t users_count; #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; spinlock_t ring_lock; |