diff options
| -rw-r--r-- | include/linux/evm.h | 56 | ||||
| -rw-r--r-- | security/integrity/evm/evm_main.c | 1 | ||||
| -rw-r--r-- | security/security.c | 16 |
3 files changed, 71 insertions, 2 deletions
diff --git a/include/linux/evm.h b/include/linux/evm.h new file mode 100644 index 00000000000..8b4e9e3b395 --- /dev/null +++ b/include/linux/evm.h @@ -0,0 +1,56 @@ +/* + * evm.h + * + * Copyright (c) 2009 IBM Corporation + * Author: Mimi Zohar <zohar@us.ibm.com> + */ + +#ifndef _LINUX_EVM_H +#define _LINUX_EVM_H + +#include <linux/integrity.h> + +#ifdef CONFIG_EVM +extern enum integrity_status evm_verifyxattr(struct dentry *dentry, + const char *xattr_name, + void *xattr_value, + size_t xattr_value_len); +extern int evm_inode_setxattr(struct dentry *dentry, const char *name, + const void *value, size_t size); +extern void evm_inode_post_setxattr(struct dentry *dentry, + const char *xattr_name, + const void *xattr_value, + size_t xattr_value_len); +extern int evm_inode_removexattr(struct dentry *dentry, const char *xattr_name); +#else +#ifdef CONFIG_INTEGRITY +static inline enum integrity_status evm_verifyxattr(struct dentry *dentry, + const char *xattr_name, + void *xattr_value, + size_t xattr_value_len) +{ + return INTEGRITY_UNKNOWN; +} +#endif + +static inline int evm_inode_setxattr(struct dentry *dentry, const char *name, + const void *value, size_t size) +{ + return 0; +} + +static inline void evm_inode_post_setxattr(struct dentry *dentry, + const char *xattr_name, + const void *xattr_value, + size_t xattr_value_len) +{ + return; +} + +static inline int evm_inode_removexattr(struct dentry *dentry, + const char *xattr_name) +{ + return 0; +} +#endif /* CONFIG_EVM_H */ +#endif /* LINUX_EVM_H */ diff --git a/security/integrity/evm/evm_main.c b/security/integrity/evm/evm_main.c index c0580dd15ec..1746c3669c6 100644 --- a/security/integrity/evm/evm_main.c +++ b/security/integrity/evm/evm_main.c @@ -18,6 +18,7 @@ #include <linux/crypto.h> #include <linux/xattr.h> #include <linux/integrity.h> +#include <linux/evm.h> #include "evm.h" int evm_initialized; diff --git a/security/security.c b/security/security.c index 947fdcfbc83..21a79b3d1e8 100644 --- a/security/security.c +++ b/security/security.c @@ -18,6 +18,7 @@ #include <linux/security.h> #include <linux/integrity.h> #include <linux/ima.h> +#include <linux/evm.h> #define MAX_LSM_XATTR 1 @@ -580,9 +581,14 @@ int security_inode_getattr(struct vfsmount *mnt, struct dentry *dentry) int security_inode_setxattr(struct dentry *dentry, const char *name, const void *value, size_t size, int flags) { + int ret; + if (unlikely(IS_PRIVATE(dentry->d_inode))) return 0; - return security_ops->inode_setxattr(dentry, name, value, size, flags); + ret = security_ops->inode_setxattr(dentry, name, value, size, flags); + if (ret) + return ret; + return evm_inode_setxattr(dentry, name, value, size); } void security_inode_post_setxattr(struct dentry *dentry, const char *name, @@ -591,6 +597,7 @@ void security_inode_post_setxattr(struct dentry *dentry, const char *name, if (unlikely(IS_PRIVATE(dentry->d_inode))) return; security_ops->inode_post_setxattr(dentry, name, value, size, flags); + evm_inode_post_setxattr(dentry, name, value, size); } int security_inode_getxattr(struct dentry *dentry, const char *name) @@ -609,9 +616,14 @@ int security_inode_listxattr(struct dentry *dentry) int security_inode_removexattr(struct dentry *dentry, const char *name) { + int ret; + if (unlikely(IS_PRIVATE(dentry->d_inode))) return 0; - return security_ops->inode_removexattr(dentry, name); + ret = security_ops->inode_removexattr(dentry, name); + if (ret) + return ret; + return evm_inode_removexattr(dentry, name); } int security_inode_need_killpriv(struct dentry *dentry) |