• Roberto Sassu's avatar
    ima: display template format in meas. list if template name length is zero · 7dbdb420
    Roberto Sassu authored
    With the introduction of the 'ima_template_fmt' kernel cmdline parameter,
    a user can define a new template descriptor with custom format. However,
    in this case, userspace tools will be unable to parse the measurements
    list because the new template is unknown. For this reason, this patch
    modifies the current IMA behavior to display in the list the template
    format instead of the name (only if the length of the latter is zero)
    so that a tool can extract needed information if it can handle listed
    fields.
    
    This patch also correctly displays the error log message in
    ima_init_template() if the selected template cannot be initialized.
    
    Changelog:
     - v3:
       - check the first byte of 'e->template_desc->name' instead of using
         strlen() in ima_fs.c (suggested by Mimi Zohar)
    
     - v2:
       - print the template format in ima_init_template(), if the selected
         template is custom (Roberto Sassu)
    
     - v1:
       - fixed patch description (Roberto Sassu, suggested by Mimi Zohar)
       - set 'template_name' variable in ima_fs.c only once
         (Roberto Sassu, suggested by Mimi Zohar)
    Signed-off-by: default avatarRoberto Sassu <roberto.sassu@polito.it>
    Signed-off-by: default avatarMimi Zohar <zohar@linux.vnet.ibm.com>
    7dbdb420
ima_template.c 4.69 KB