[xen staging] x86/tboot: include all valid frame table entries in S3 integrity check

[patchbot@xxxxxxx]

commit 8701f68d26afc641527c775d2e56a8709f535ffd
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Mon May 31 12:45:51 2021 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Mon May 31 12:45:51 2021 +0200

    x86/tboot: include all valid frame table entries in S3 integrity check
    
    The difference of two pdx_to_page() return values is a number of pages,
    not the number of bytes covered by the corresponding frame table entries.
    
    Fixes: 3cb68d2b59ab ("tboot: fix S3 issue for Intel Trusted Execution 
Technology.")
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Lukasz Hawrylko <lukasz.hawrylko@xxxxxxxxxxxxxxx>
---
 xen/arch/x86/tboot.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/xen/arch/x86/tboot.c b/xen/arch/x86/tboot.c
index aadcce591f..f394bd33b1 100644
--- a/xen/arch/x86/tboot.c
+++ b/xen/arch/x86/tboot.c
@@ -323,12 +323,12 @@ static void tboot_gen_frametable_integrity(const uint8_t 
key[TB_KEY_SIZE],
         if ( nidx >= max_idx )
             break;
         vmac_update((uint8_t *)pdx_to_page(sidx * PDX_GROUP_COUNT),
-                       pdx_to_page(eidx * PDX_GROUP_COUNT)
-                       - pdx_to_page(sidx * PDX_GROUP_COUNT), &ctx);
+                    (eidx - sidx) * PDX_GROUP_COUNT * sizeof(*frame_table),
+                    &ctx);
     }
     vmac_update((uint8_t *)pdx_to_page(sidx * PDX_GROUP_COUNT),
-                   pdx_to_page(max_pdx - 1) + 1
-                   - pdx_to_page(sidx * PDX_GROUP_COUNT), &ctx);
+                (max_pdx - sidx * PDX_GROUP_COUNT) * sizeof(*frame_table),
+                &ctx);
 
     *mac = vmac(NULL, 0, nonce, NULL, &ctx);
 
--
generated by git-patchbot for /home/xen/git/xen.git#staging