path: root/security/integrity/digsig_asymmetric.c
diff options
authorDmitry Kasatkin <>2014-07-02 15:12:26 +0300
committerMimi Zohar <>2014-09-09 10:28:44 -0400
commitd9a2e5d788d39f7593e2af5e1a365e2b9300679f (patch)
treecf1f4fba8aa27d2e80cd8ac9036ecab28295c6b1 /security/integrity/digsig_asymmetric.c
parent3034a146820c26fe6da66a45f6340fe87fe0983a (diff)
integrity: prevent flooding with 'Request for unknown key'
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 <> Signed-off-by: Mimi Zohar <>
Diffstat (limited to 'security/integrity/digsig_asymmetric.c')
1 files changed, 3 insertions, 2 deletions
diff --git a/security/integrity/digsig_asymmetric.c b/security/integrity/digsig_asymmetric.c
index 9eae4809006b..37e0d98517a8 100644
--- a/security/integrity/digsig_asymmetric.c
+++ b/security/integrity/digsig_asymmetric.c
@@ -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: