X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/cc8bc92ae4a8e9f1a1ab61bf83d34ad8150b3405..5c9f46613a83ebfc29a5b1f099448259e96a98f0:/bsd/kern/sys_reason.c

diff --git a/bsd/kern/sys_reason.c b/bsd/kern/sys_reason.c
index 16ea4cfe4..ea260cdc3 100644
--- a/bsd/kern/sys_reason.c
+++ b/bsd/kern/sys_reason.c
@@ -278,7 +278,9 @@ os_reason_ref(os_reason_t cur_reason)
 	lck_mtx_lock(&cur_reason->osr_lock);
 
 	assert(cur_reason->osr_refcount > 0);
-	cur_reason->osr_refcount++;
+	if (os_add_overflow(cur_reason->osr_refcount, 1, &cur_reason->osr_refcount)) {
+		panic("os reason refcount overflow");
+	}
 
 	lck_mtx_unlock(&cur_reason->osr_lock);
 
@@ -298,7 +300,9 @@ os_reason_free(os_reason_t cur_reason)
 
 	lck_mtx_lock(&cur_reason->osr_lock);
 
-	assert(cur_reason->osr_refcount > 0);
+	if (cur_reason->osr_refcount == 0) {
+		panic("os_reason_free called on reason with zero refcount");
+	}
 
 	cur_reason->osr_refcount--;
 	if (cur_reason->osr_refcount != 0) {