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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-12-07 10:18:54 -0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-12-09 09:53:18 -0800 |
| commit | ea212a4a7a432e0ecd0f0f53971b70172b3e7f96 (patch) | |
| tree | 6b93d189c07456be4ed6758a6900ef5af6ed4b20 /fs | |
| parent | 5d909cdbbba244ecb4c2dfc4dc3e3bc29529fb05 (diff) | |
| download | blackbird-obmc-linux-ea212a4a7a432e0ecd0f0f53971b70172b3e7f96.tar.gz blackbird-obmc-linux-ea212a4a7a432e0ecd0f0f53971b70172b3e7f96.zip | |
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>
Diffstat (limited to 'fs')
| -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 a018ed327713..294e71576cec 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -1591,14 +1591,18 @@ 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: |
