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-rw-r--r--source3/locking/brlock.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/source3/locking/brlock.c b/source3/locking/brlock.c
index b021293c7b..22c6c9e5b3 100644
--- a/source3/locking/brlock.c
+++ b/source3/locking/brlock.c
@@ -333,6 +333,11 @@ NTSTATUS brl_lock_windows_default(struct byte_range_lock *br_lck,
SMB_ASSERT(plock->lock_type != UNLOCK_LOCK);
for (i=0; i < br_lck->num_locks; i++) {
+ if (locks[i].start + locks[i].size < locks[i].start) {
+ /* 64-bit wrap. Error. */
+ return NT_STATUS_INVALID_LOCK_RANGE;
+ }
+
/* Do any Windows or POSIX locks conflict ? */
if (brl_conflict(&locks[i], plock)) {
/* Remember who blocked us. */