[Xen-changelog] [xen master] x86/hvm: add check when register io handler

[patchbot@xxxxxxx]

commit aefa50645cad7982f8b2b1ab33995cafe32787b2
Author:     Suravee Suthikulpanit <suravee.suthikulpanit@xxxxxxx>
AuthorDate: Wed Jun 8 14:13:59 2016 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Wed Jun 8 14:13:59 2016 +0200

    x86/hvm: add check when register io handler
    
    At the time of registering HVM I/O handler, the HVM domain might
    not have been initialized, which means the hvm_domain.io_handler
    would be NULL. In the hvm_next_io_handler(), this should be asserted.
    
    Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@xxxxxxx>
    Reviewed-by: Paul Durrant <paul.durrant@xxxxxxxxxx>
---
 xen/arch/x86/hvm/intercept.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/xen/arch/x86/hvm/intercept.c b/xen/arch/x86/hvm/intercept.c
index fc757d0..bf141c9 100644
--- a/xen/arch/x86/hvm/intercept.c
+++ b/xen/arch/x86/hvm/intercept.c
@@ -258,6 +258,8 @@ struct hvm_io_handler *hvm_next_io_handler(struct domain *d)
 {
     unsigned int i = d->arch.hvm_domain.io_handler_count++;
 
+    ASSERT(d->arch.hvm_domain.io_handler);
+
     if ( i == NR_IO_HANDLERS )
     {
         domain_crash(d);
--
generated by git-patchbot for /home/xen/git/xen.git#master

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