From a4240a8ac7871f8de537edf799e37e0a4fd4be08 Mon Sep 17 00:00:00 2001
From: Richard Yao <richard.yao@alumni.stonybrook.edu>
Date: Sun, 12 Feb 2023 16:38:27 -0500
Subject: [PATCH] Suppress Clang Static Analyzer false positive in the AVL tree
 code.

This has been filed as llvm/llvm-project#60694. Switching from a copy
through a C pointer dereference to an explicit memcpy() is a workaround
that prevents a false positive.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Closes #14575
---
 module/avl/avl.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/module/avl/avl.c b/module/avl/avl.c
index b788ed28a..9b74531fa 100644
--- a/module/avl/avl.c
+++ b/module/avl/avl.c
@@ -108,6 +108,10 @@
 #include <sys/cmn_err.h>
 #include <sys/mod.h>
 
+#ifndef _KERNEL
+#include <string.h>
+#endif
+
 /*
  * Walk from one node to the previous valued node (ie. an infix walk
  * towards the left). At any given node we do one of 2 things:
@@ -695,7 +699,7 @@ avl_remove(avl_tree_t *tree, void *data)
 		 */
 		tmp = *node;
 
-		*node = *delete;
+		memcpy(node, delete, sizeof (*node));
 		if (node->avl_child[left] == node)
 			node->avl_child[left] = &tmp;