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ima: log message to module appraisal error

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Simple but useful message log to the user in case of module appraise is
forced and fails due to the lack of file descriptor, that might be
caused by kmod calls to compressed modules.

Signed-off-by: Bruno E. O. Meneguele <[email protected]>
Signed-off-by: Mimi Zohar <[email protected]>
This commit is contained in:
Bruno E. O. Meneguele 2017-12-05 11:35:32 -02:00 • committed by Mimi Zohar
commit 9c655be064
1 changed files with 3 additions and 1 deletions
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4
security/integrity/ima/ima_main.c
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@ -404,8 +404,10 @@ int ima_read_file(struct file *file, enum kernel_read_file_id read_id)
if (!file && read_id == READING_MODULE) {
if (!sig_enforce && (ima_appraise & IMA_APPRAISE_MODULES) &&
(ima_appraise & IMA_APPRAISE_ENFORCE))
(ima_appraise & IMA_APPRAISE_ENFORCE)) {
pr_err("impossible to appraise a module without a file descriptor. sig_enforce kernel parameter might help\n");
return -EACCES; /* INTEGRITY_UNKNOWN */
}
return 0; /* We rely on module signature checking */
}
return 0;