[Xen-changelog] [xen stable-4.3] xsm: forbid PV guest console reads

[patchbot@xxxxxxx]

commit b267a5a2cae14c97ab9198336f1529e7e48fad22
Author:     Daniel De Graaf <dgdegra@xxxxxxxxxxxxx>
AuthorDate: Wed Oct 9 12:04:29 2013 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Wed Oct 9 12:04:29 2013 +0200

    xsm: forbid PV guest console reads
    
    The CONSOLEIO_read operation was incorrectly allowed to PV guests if the
    hypervisor was compiled in debug mode (with VERBOSE defined).
    
    Reported-by: Jan Beulich <jbeulich@xxxxxxxx>
    Signed-off-by: Daniel De Graaf <dgdegra@xxxxxxxxxxxxx>
    master commit: 65ba631bcb62c79eb33ebfde8a0471fd012c37a8
    master date: 2013-10-04 12:51:44 +0200
---
 xen/include/xsm/dummy.h |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/xen/include/xsm/dummy.h b/xen/include/xsm/dummy.h
index cc0a5a8..ecf262b 100644
--- a/xen/include/xsm/dummy.h
+++ b/xen/include/xsm/dummy.h
@@ -222,10 +222,10 @@ static XSM_INLINE int xsm_console_io(XSM_DEFAULT_ARG 
struct domain *d, int cmd)
 {
     XSM_ASSERT_ACTION(XSM_OTHER);
 #ifdef VERBOSE
-    return xsm_default_action(XSM_HOOK, current->domain, NULL);
-#else
-    return xsm_default_action(XSM_PRIV, current->domain, NULL);
+    if ( cmd == CONSOLEIO_write )
+        return xsm_default_action(XSM_HOOK, d, NULL);
 #endif
+    return xsm_default_action(XSM_PRIV, d, NULL);
 }
 
 static XSM_INLINE int xsm_profile(XSM_DEFAULT_ARG struct domain *d, int op)
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.3

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