From 85f3ce32ed3eba4e7194249a04e55996e1b3c1a0 Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Mon, 7 Dec 2015 10:18:54 -0800 Subject: f2fs: use lock_buffer when changing superblock When modifying sb contents, we need to use lock its buffer. Signed-off-by: Jaegeuk Kim --- fs/f2fs/file.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index cb62a12c2..784327943 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -1612,14 +1612,18 @@ 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); mnt_drop_write_file(filp); if (err) { /* undo new data */ + lock_buffer(sbi->raw_super_buf); memset(sbi->raw_super->encrypt_pw_salt, 0, 16); + unlock_buffer(sbi->raw_super_buf); return err; } got_it: -- cgit v1.2.3