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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: bd2bfa4c52 ("memory: introduce memory_region_notify_one()")
Cc: qemu-stable@nongnu.org
Cc: Peter Xu <peterx@redhat.com>
Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Message-Id: <20171010094247.10173-4-maxime.coquelin@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit b021d1c044)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
stable-2.10
Maxime Coquelin 2017-10-10 11:42:47 +02:00 committed by Michael Roth
parent ae13e2cfa8
commit d765c5e577
1 changed files with 1 additions and 1 deletions
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2
memory.c
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@ -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;
}