[xen staging] x86/vLAPIC: don't leak regs page from vlapic_init() upon error

[patchbot@xxxxxxx]

commit 8a62dee9ceff3056c7e0bd9632bac39bee2a51b3
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Fri Oct 2 12:30:34 2020 +0200
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Fri Oct 9 17:20:11 2020 +0100

    x86/vLAPIC: don't leak regs page from vlapic_init() upon error
    
    Fixes: 8a981e0bf25e ("Make map_domain_page_global fail")
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/arch/x86/hvm/vlapic.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/xen/arch/x86/hvm/vlapic.c b/xen/arch/x86/hvm/vlapic.c
index 4e3861eb7d..59660a8af4 100644
--- a/xen/arch/x86/hvm/vlapic.c
+++ b/xen/arch/x86/hvm/vlapic.c
@@ -1625,6 +1625,7 @@ int vlapic_init(struct vcpu *v)
         vlapic->regs = __map_domain_page_global(vlapic->regs_page);
         if ( vlapic->regs == NULL )
         {
+            free_domheap_page(vlapic->regs_page);
             dprintk(XENLOG_ERR, "map vlapic regs error: %d/%d\n",
                     v->domain->domain_id, v->vcpu_id);
             return -ENOMEM;
--
generated by git-patchbot for /home/xen/git/xen.git#staging