From bb543e3959b5909e7b5db4a216018c634a9d9898 Mon Sep 17 00:00:00 2001 From: Thiago Jung Bauermann Date: Wed, 7 Jun 2017 22:49:10 -0300 Subject: [PATCH] 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 Signed-off-by: Mimi Zohar --- 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 -- 2.20.1