[Xen-changelog] [qemu-xen stable-4.10] memory: fix off-by-one error in memory_region_notify_one()

[patchbot@xxxxxxx]

commit d765c5e5779fe25f8dcb7f65c9a27a7b5a77941f
Author:     Maxime Coquelin <maxime.coquelin@xxxxxxxxxx>
AuthorDate: Tue Oct 10 11:42:47 2017 +0200
Commit:     Michael Roth <mdroth@xxxxxxxxxxxxxxxxxx>
CommitDate: Mon Dec 4 22:42:41 2017 -0600

    memory: fix off-by-one error in memory_region_notify_one()
    
    This patch fixes an off-by-one error that could lead to the
    notifyee to receive notifications for ranges it is not
    registered to.
    
    The bug has been spotted by code review.
    
    Fixes: bd2bfa4c52e5 ("memory: introduce memory_region_notify_one()")
    Cc: qemu-stable@xxxxxxxxxx
    Cc: Peter Xu <peterx@xxxxxxxxxx>
    Signed-off-by: Maxime Coquelin <maxime.coquelin@xxxxxxxxxx>
    Message-Id: <20171010094247.10173-4-maxime.coquelin@xxxxxxxxxx>
    Reviewed-by: Peter Xu <peterx@xxxxxxxxxx>
    Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
    (cherry picked from commit b021d1c04452276f4926eed2d104ccbd1037a6e1)
    Signed-off-by: Michael Roth <mdroth@xxxxxxxxxxxxxxxxxx>
---
 memory.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/memory.c b/memory.c
index d908538..d05a80a 100644
--- a/memory.c
+++ b/memory.c
@@ -1891,7 +1891,7 @@ void memory_region_notify_one(IOMMUNotifier *notifier,
      * Skip the notification if the notification does not overlap
      * with registered range.
      */
-    if (notifier->start > entry->iova + entry->addr_mask + 1 ||
+    if (notifier->start > entry->iova + entry->addr_mask ||
         notifier->end < entry->iova) {
         return;
     }
--
generated by git-patchbot for /home/xen/git/qemu-xen.git#stable-4.10

_______________________________________________
Xen-changelog mailing list
Xen-changelog@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/xen-changelog