From: Liam R. Howlett <Liam.Howlett@oracle.com>
Date: Thu, 18 May 2023 14:55:22 +0000 (-0400)
Subject: maple_tree: use MAS_WR_BUG_ON() in mas_store_prealloc()
X-Git-Tag: v6.5-rc1~176^2~308
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=1c414c6a4b232245153a2de90106e0fba62ed78e;p=tomoyo%2Ftomoyo-test1.git

maple_tree: use MAS_WR_BUG_ON() in mas_store_prealloc()

mas_store_prealloc() should never fail, but if it does due to internal
tree issues then get as much debug information as possible prior to
crashing the kernel.

Link: https://lkml.kernel.org/r/20230518145544.1722059-14-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: David Binderman <dcb314@hotmail.com>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Vernon Yang <vernon2gm@gmail.com>
Cc: Wei Yang <richard.weiyang@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index 0d85f4e99cfa..9bb96430889b 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -5756,7 +5756,7 @@ void mas_store_prealloc(struct ma_state *mas, void *entry)
 	mas_wr_store_setup(&wr_mas);
 	trace_ma_write(__func__, mas, 0, entry);
 	mas_wr_store_entry(&wr_mas);
-	BUG_ON(mas_is_err(mas));
+	MAS_WR_BUG_ON(&wr_mas, mas_is_err(mas));
 	mas_destroy(mas);
 }
 EXPORT_SYMBOL_GPL(mas_store_prealloc);