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integrity: prevent flooding with 'Request for unknown key'

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If file has IMA signature, IMA in enforce mode, but key is missing
then file access is blocked and single error message is printed.

If IMA appraisal is enabled in fix mode, then system runs as usual
but might produce tons of 'Request for unknown key' messages.

This patch switches 'pr_warn' to 'pr_err_ratelimited'.

Signed-off-by: Dmitry Kasatkin <d.kasatkin@samsung.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
This commit is contained in:
Dmitry Kasatkin 2014-07-02 15:12:26 +03:00 committed by Mimi Zohar
parent 3034a14682
commit d9a2e5d788
1 changed files with 3 additions and 2 deletions
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5
security/integrity/digsig_asymmetric.c
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@ -13,6 +13,7 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/err.h>
#include <linux/ratelimit.h>
#include <linux/key-type.h>
#include <crypto/public_key.h>
#include <keys/asymmetric-type.h>
@ -45,8 +46,8 @@ static struct key *request_asymmetric_key(struct key *keyring, uint32_t keyid)
}
if (IS_ERR(key)) {
pr_warn("Request for unknown key '%s' err %ld\n",
name, PTR_ERR(key));
pr_err_ratelimited("Request for unknown key '%s' err %ld\n",
name, PTR_ERR(key));
switch (PTR_ERR(key)) {
/* Hide some search errors */
case -EACCES: