From: Jaegeuk Kim <jaegeuk@kernel.org>
Date: Mon, 15 Jun 2015 21:52:29 +0000 (-0700)
Subject: f2fs: avoid freed stat information
X-Git-Tag: v4.3-rc1~91^2~82
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=eca616f8c1d6c581f3785f0ee3e2a3887e084273;p=karo-tx-linux.git

f2fs: avoid freed stat information

The write_checkpoint can update stat information, so we should destroy the stat
structure after it.

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index a06b0b46fe69..da277100dc90 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -498,7 +498,6 @@ static void f2fs_put_super(struct super_block *sb)
 	}
 	kobject_del(&sbi->s_kobj);
 
-	f2fs_destroy_stats(sbi);
 	stop_gc_thread(sbi);
 
 	/*
@@ -514,6 +513,9 @@ static void f2fs_put_super(struct super_block *sb)
 		write_checkpoint(sbi, &cpc);
 	}
 
+	/* write_checkpoint can update stat informaion */
+	f2fs_destroy_stats(sbi);
+
 	/*
 	 * normally superblock is clean, so we need to release this.
 	 * In addition, EIO will skip do checkpoint, we need this as well.