Commit ea212a4a authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

f2fs: use lock_buffer when changing superblock



When modifying sb contents, we need to use lock its buffer.
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 5d909cdb
......@@ -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:
......
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