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| author | Fabiano Rosas <farosas@linux.ibm.com> | 2022-01-25 18:57:35 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-02-03 08:50:44 +0300 |
| commit | 4feb74aa64b35b21a4937f96d7a940adee286e5b (patch) | |
| tree | fd9c309897044cee4ba29566be056971ac9582ba /arch/powerpc/kvm/powerpc.c | |
| parent | 175be7e5800e2782a7e38ee9e1b64633494c4b44 (diff) | |
| download | linux-4feb74aa64b35b21a4937f96d7a940adee286e5b.tar.xz | |
KVM: PPC: Decrement module refcount if init_vm fails
We increment the reference count for KVM-HV/PR before the call to
kvmppc_core_init_vm. If that function fails we need to decrement the
refcount.
Also remove the check on kvm_ops->owner because try_module_get can
handle a NULL module.
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220125155735.1018683-5-farosas@linux.ibm.com
Diffstat (limited to 'arch/powerpc/kvm/powerpc.c')
| -rw-r--r-- | arch/powerpc/kvm/powerpc.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index 1d06b68739b0..9772b176e406 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -453,6 +453,8 @@ int kvm_arch_check_processor_compat(void *opaque) int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) { struct kvmppc_ops *kvm_ops = NULL; + int r; + /* * if we have both HV and PR enabled, default is HV */ @@ -474,11 +476,14 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) } else goto err_out; - if (kvm_ops->owner && !try_module_get(kvm_ops->owner)) + if (!try_module_get(kvm_ops->owner)) return -ENOENT; kvm->arch.kvm_ops = kvm_ops; - return kvmppc_core_init_vm(kvm); + r = kvmppc_core_init_vm(kvm); + if (r) + module_put(kvm_ops->owner); + return r; err_out: return -EINVAL; } |