diff options
| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-12-07 10:18:54 -0800 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-04-13 12:32:30 +0200 |
| commit | 85f3ce32ed3eba4e7194249a04e55996e1b3c1a0 (patch) | |
| tree | cefa64d30991ae3602a5289f00888a76c30b1db6 | |
| parent | 42d7ff065c6a2a93ed75ae04194d6583161e489f (diff) | |
f2fs: use lock_buffer when changing superblock
When modifying sb contents, we need to use lock its buffer.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
| -rw-r--r-- | fs/f2fs/file.c | 4 |
1 files changed, 4 insertions, 0 deletions
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: |