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KVM: PPC: Book3S HV: Fix memory leak in kvm_vm_ioctl_get_htab_fd

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We do ctx = kzalloc(sizeof(*ctx), GFP_KERNEL) and then later on call
anon_inode_getfd(), but if that fails we don't free ctx, so that
memory gets leaked.  To fix it, this adds kfree(ctx) in the failure
path.

Signed-off-by: nixiaoming <nixiaoming@huawei.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
This commit is contained in:
nixiaoming 2017-08-31 18:51:09 +08:00 committed by Paul Mackerras
parent 4dafecde44
commit 43f6b0cfb2
1 changed files with 1 additions and 0 deletions
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arch/powerpc/kvm/book3s_64_mmu_hv.c
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@ -1941,6 +1941,7 @@ int kvm_vm_ioctl_get_htab_fd(struct kvm *kvm, struct kvm_get_htab_fd *ghf)
rwflag = (ghf->flags & KVM_GET_HTAB_WRITE) ? O_WRONLY : O_RDONLY;
ret = anon_inode_getfd("kvm-htab", &kvm_htab_fops, ctx, rwflag | O_CLOEXEC);
if (ret < 0) {
kfree(ctx);
kvm_put_kvm(kvm);
return ret;
}