Changeset 91992 in vbox

Timestamp:

Oct 22, 2021 4:51:51 AM (3 years ago)

Author:

vboxsync

Message:

VMM: Nested VMX: bugref:10092 EPT PML4E effective RW permissions fix.

File:

• trunk/src/VBox/VMM/VMMAll/PGMAllGst.h (modified) (1 diff)

trunk/src/VBox/VMM/VMMAll/PGMAllGst.h

@@ -188 +188 @@
         uint32_t const fEffectiveEpt = ((uint32_t)Pml4e.u & EPT_PML4E_ATTR_MASK) << PGMPTWALK_EFF_EPT_ATTR_SHIFT;
         uint8_t const fReadWrite = RT_BF_GET(fEffectiveEpt, PGM_BF_PTWALK_EFF_R)
-                                 | RT_BF_GET(fEffectiveEpt, PGM_BF_PTWALK_EFF_W);
+                                 & RT_BF_GET(fEffectiveEpt, PGM_BF_PTWALK_EFF_W);
         uint8_t const fExecute   = RT_BF_GET(fEffectiveEpt, PGM_BF_PTWALK_EFF_X_SUPER);
         uint8_t const fAccessed  = RT_BF_GET(fEffectiveEpt, PGM_BF_PTWALK_EFF_A);