[PATCH 3/3] f2fs: use lock_buffer when changing superblock

[Jaegeuk Kim]

When modifying sb contents, we need to use lock its buffer.

Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
---
 fs/f2fs/file.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index a018ed3..a16dfe9 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -1591,7 +1591,9 @@ static int f2fs_ioc_get_encryption_pwsalt(struct file *filp, unsigned long arg)
 		return err;
 
 	/* update superblock with uuid */
+	lock_buffer(sbi->raw_super_buf);
 	generate_random_uuid(sbi->raw_super->encrypt_pw_salt);
+	unlock_buffer(sbi->raw_super_buf);
 
 	err = f2fs_commit_super(sbi, false);
 
-- 
2.4.9 (Apple Git-60)

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