xnu-4570.31.3.tar.gz

[apple/xnu.git] / osfmk / ipc / ipc_kmsg.c

diff --git a/osfmk/ipc/ipc_kmsg.c b/osfmk/ipc/ipc_kmsg.c
index 4ec900c7b9ea5000e8b4ee1ce1c118c089ace2f0..e5445a290db53c702c70b7cc776f532674f5f8ca 100644 (file)
--- a/osfmk/ipc/ipc_kmsg.c
+++ b/osfmk/ipc/ipc_kmsg.c
@@ -1160,6 +1160,12 @@ ipc_kmsg_rmqueue(
 
                queue->ikmq_base = IKM_NULL;
        } else {
+               if (__improbable(next->ikm_prev != kmsg || prev->ikm_next != kmsg)) {
+                       panic("ipc_kmsg_rmqueue: inconsistent prev/next pointers. "
+                               "(prev->next: %p, next->prev: %p, kmsg: %p)",
+                               prev->ikm_next, next->ikm_prev, kmsg);
+               }
+
                if (queue->ikmq_base == kmsg)
                        queue->ikmq_base = next;