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Message-Id: <1496886555-10082-2-git-send-email-bauerman@linux.vnet.ibm.com>
Date: Wed, 7 Jun 2017 22:49:10 -0300
From: Thiago Jung Bauermann <bauerman@...ux.vnet.ibm.com>
To: linux-security-module@...r.kernel.org
Cc: linux-ima-devel@...ts.sourceforge.net, keyrings@...r.kernel.org,
linux-crypto@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
linux-kernel@...r.kernel.org,
Mimi Zohar <zohar@...ux.vnet.ibm.com>,
Dmitry Kasatkin <dmitry.kasatkin@...il.com>,
James Morris <james.l.morris@...cle.com>,
"Serge E. Hallyn" <serge@...lyn.com>,
David Howells <dhowells@...hat.com>,
David Woodhouse <dwmw2@...radead.org>,
Jessica Yu <jeyu@...hat.com>,
Rusty Russell <rusty@...tcorp.com.au>,
Herbert Xu <herbert@...dor.apana.org.au>,
"David S. Miller" <davem@...emloft.net>,
"AKASHI, Takahiro" <takahiro.akashi@...aro.org>,
Thiago Jung Bauermann <bauerman@...ux.vnet.ibm.com>
Subject: [PATCH v2 1/6] integrity: Small code improvements
These changes are too small to warrant their own patches:
The keyid and sig_size members of struct signature_v2_hdr are in BE format,
so use a type that makes this assumption explicit. Also, use beXX_to_cpu
instead of __beXX_to_cpu to read them.
Change integrity_kernel_read to take a void * buffer instead of char *
buffer, so that callers don't have to use a cast if they provide a buffer
that isn't a char *.
Add missing #endif comment in ima.h pointing out which macro it refers to.
Add missing fall through comment in ima_appraise.c.
Constify mask_tokens and func_tokens arrays.
Signed-off-by: Thiago Jung Bauermann <bauerman@...ux.vnet.ibm.com>
---
security/integrity/digsig_asymmetric.c | 4 ++--
security/integrity/iint.c | 2 +-
security/integrity/ima/ima.h | 2 +-
security/integrity/ima/ima_appraise.c | 1 +
security/integrity/ima/ima_policy.c | 4 ++--
security/integrity/integrity.h | 7 ++++---
6 files changed, 11 insertions(+), 9 deletions(-)
diff --git a/security/integrity/digsig_asymmetric.c b/security/integrity/digsig_asymmetric.c
index 80052ed8d467..ab6a029062a1 100644
--- a/security/integrity/digsig_asymmetric.c
+++ b/security/integrity/digsig_asymmetric.c
@@ -92,13 +92,13 @@ int asymmetric_verify(struct key *keyring, const char *sig,
siglen -= sizeof(*hdr);
- if (siglen != __be16_to_cpu(hdr->sig_size))
+ if (siglen != be16_to_cpu(hdr->sig_size))
return -EBADMSG;
if (hdr->hash_algo >= HASH_ALGO__LAST)
return -ENOPKG;
- key = request_asymmetric_key(keyring, __be32_to_cpu(hdr->keyid));
+ key = request_asymmetric_key(keyring, be32_to_cpu(hdr->keyid));
if (IS_ERR(key))
return PTR_ERR(key);
diff --git a/security/integrity/iint.c b/security/integrity/iint.c
index c710d22042f9..6fc888ca468e 100644
--- a/security/integrity/iint.c
+++ b/security/integrity/iint.c
@@ -182,7 +182,7 @@ security_initcall(integrity_iintcache_init);
*
*/
int integrity_kernel_read(struct file *file, loff_t offset,
- char *addr, unsigned long count)
+ void *addr, unsigned long count)
{
mm_segment_t old_fs;
char __user *buf = (char __user *)addr;
diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h
index d26a30e37d13..215a93c41b51 100644
--- a/security/integrity/ima/ima.h
+++ b/security/integrity/ima/ima.h
@@ -284,7 +284,7 @@ static inline int ima_read_xattr(struct dentry *dentry,
return 0;
}
-#endif
+#endif /* CONFIG_IMA_APPRAISE */
/* LSM based policy rules require audit */
#ifdef CONFIG_IMA_LSM_RULES
diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c
index 7fe0566142d8..ea36a4f134f4 100644
--- a/security/integrity/ima/ima_appraise.c
+++ b/security/integrity/ima/ima_appraise.c
@@ -240,6 +240,7 @@ int ima_appraise_measurement(enum ima_hooks func,
case IMA_XATTR_DIGEST_NG:
/* first byte contains algorithm id */
hash_start = 1;
+ /* fall through */
case IMA_XATTR_DIGEST:
if (iint->flags & IMA_DIGSIG_REQUIRED) {
cause = "IMA-signature-required";
diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c
index 0acd68decb17..949ad3858327 100644
--- a/security/integrity/ima/ima_policy.c
+++ b/security/integrity/ima/ima_policy.c
@@ -965,7 +965,7 @@ enum {
mask_exec = 0, mask_write, mask_read, mask_append
};
-static char *mask_tokens[] = {
+static const char *const mask_tokens[] = {
"MAY_EXEC",
"MAY_WRITE",
"MAY_READ",
@@ -979,7 +979,7 @@ enum {
func_policy
};
-static char *func_tokens[] = {
+static const char *const func_tokens[] = {
"FILE_CHECK",
"MMAP_CHECK",
"BPRM_CHECK",
diff --git a/security/integrity/integrity.h b/security/integrity/integrity.h
index 24520b4ef3b0..a53e7e4ab06c 100644
--- a/security/integrity/integrity.h
+++ b/security/integrity/integrity.h
@@ -92,8 +92,8 @@ struct signature_v2_hdr {
uint8_t type; /* xattr type */
uint8_t version; /* signature format version */
uint8_t hash_algo; /* Digest algorithm [enum hash_algo] */
- uint32_t keyid; /* IMA key identifier - not X509/PGP specific */
- uint16_t sig_size; /* signature size */
+ __be32 keyid; /* IMA key identifier - not X509/PGP specific */
+ __be16 sig_size; /* signature size */
uint8_t sig[0]; /* signature payload */
} __packed;
@@ -118,7 +118,8 @@ struct integrity_iint_cache {
struct integrity_iint_cache *integrity_iint_find(struct inode *inode);
int integrity_kernel_read(struct file *file, loff_t offset,
- char *addr, unsigned long count);
+ void *addr, unsigned long count);
+
int __init integrity_read_file(const char *path, char **data);
#define INTEGRITY_KEYRING_EVM 0
--
2.7.4
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