linux-kernel - [PATCH 01/12] f2fs: avoid freed stat information

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Message-Id: <1435603176-63219-1-git-send-email-jaegeuk@kernel.org>
Date:	Mon, 29 Jun 2015 11:39:25 -0700
From:	Jaegeuk Kim <jaegeuk@...nel.org>
To:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net
Cc:	Jaegeuk Kim <jaegeuk@...nel.org>
Subject: [PATCH 01/12] f2fs: avoid freed stat information

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

Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
---
 fs/f2fs/super.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index a06b0b4..da27710 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.
-- 
2.1.1

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