Re: [PATCH v5 05/21] ima: move ima_file_free before releasing the file

Serge E. Hallyn
2011-05-19T22:06:56Z

Quoting Mimi Zohar (zohar@linux.vnet.ibm.com):
> Integrity appraisal measures files on file_free and stores the file
> measurement as an xattr. Measure the file before releasing it.

Can you put a bit more in the commit msg about why? What's magic
about the fs-specific release function?

> Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
> Acked-by: Serge Hallyn <serge.hallyn@ubuntu.com>
> ---
> fs/file_table.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/fs/file_table.c b/fs/file_table.c
> index 01e4c1e..33f54a1 100644
> --- a/fs/file_table.c
> +++ b/fs/file_table.c
> @@ -243,10 +243,10 @@ static void __fput(struct file *file)
> if (file->f_op && file->f_op->fasync)
> file->f_op->fasync(-1, file, 0);
> }
> + ima_file_free(file);
> if (file->f_op && file->f_op->release)
> file->f_op->release(inode, file);
> security_file_free(file);
> - ima_file_free(file);
> if (unlikely(S_ISCHR(inode->i_mode) && inode->i_cdev != NULL &&
> !(file->f_mode & FMODE_PATH))) {
> cdev_put(inode->i_cdev);
> --
> 1.7.3.4
>
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