diff options
| author | Mimi Zohar <zohar@linux.vnet.ibm.com> | 2011-03-09 14:38:26 -0500 |
|---|---|---|
| committer | Mimi Zohar <zohar@linux.vnet.ibm.com> | 2011-07-18 12:29:42 -0400 |
| commit | 3e1be52d6c6b21d9080dd886c0e609e009831562 (patch) | |
| tree | 2947250698b89eed0149af2d69a33b303c4d6be4 /security/security.c | |
| parent | 6be5cc5246f807fd8ede9f5f1bb2826f2c598658 (diff) | |
| download | lwn-3e1be52d6c6b21d9080dd886c0e609e009831562.tar.gz lwn-3e1be52d6c6b21d9080dd886c0e609e009831562.zip | |
security: imbed evm calls in security hooks
Imbed the evm calls evm_inode_setxattr(), evm_inode_post_setxattr(),
evm_inode_removexattr() in the security hooks. evm_inode_setxattr()
protects security.evm xattr. evm_inode_post_setxattr() and
evm_inode_removexattr() updates the hmac associated with an inode.
(Assumes an LSM module protects the setting/removing of xattr.)
Changelog:
- Don't define evm_verifyxattr(), unless CONFIG_INTEGRITY is enabled.
- xattr_name is a 'const', value is 'void *'
Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
Acked-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Diffstat (limited to 'security/security.c')
| -rw-r--r-- | security/security.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/security/security.c b/security/security.c index 947fdcfbc83e..21a79b3d1e8e 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) |