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authorMimi Zohar <zohar@linux.vnet.ibm.com>2011-03-10 18:54:15 -0500
committerMimi Zohar <zohar@linux.vnet.ibm.com>2012-09-07 14:57:47 -0400
commit42c63330f2b05aa6077c1bfc2798c04afe54f6b2 (patch)
treebbd7d212ba9c686b2b649718b8b919bdd2eecea4 /include/linux/ima.h
parent9957a5043e7b0b7361cdf48eea22b2900293e63a (diff)
ima: add ima_inode_setxattr/removexattr function and calls
Based on xattr_permission comments, the restriction to modify 'security' xattr is left up to the underlying fs or lsm. Ensure that not just anyone can modify or remove 'security.ima'. Changelog v1: - Unless IMA-APPRAISE is configured, use stub ima_inode_removexattr()/setxattr() functions. (Moved ima_inode_removexattr()/setxattr() to ima_appraise.c) Changelog: - take i_mutex to fix locking (Dmitry Kasatkin) - ima_reset_appraise_flags should only be called when modifying or removing the 'security.ima' xattr. Requires CAP_SYS_ADMIN privilege. (Incorporated fix from Roberto Sassu) - Even if allowed to update security.ima, reset the appraisal flags, forcing re-appraisal. - Replace CAP_MAC_ADMIN with CAP_SYS_ADMIN - static inline ima_inode_setxattr()/ima_inode_removexattr() stubs - ima_protect_xattr should be static Signed-off-by: Mimi Zohar <zohar@us.ibm.com> Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@intel.com>
Diffstat (limited to 'include/linux/ima.h')
-rw-r--r--include/linux/ima.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/ima.h b/include/linux/ima.h
index e2bfbb1e9af..2c7223d7e73 100644
--- a/include/linux/ima.h
+++ b/include/linux/ima.h
@@ -44,10 +44,27 @@ static inline int ima_file_mmap(struct file *file, unsigned long prot)
#ifdef CONFIG_IMA_APPRAISE
extern void ima_inode_post_setattr(struct dentry *dentry);
+extern int ima_inode_setxattr(struct dentry *dentry, const char *xattr_name,
+ const void *xattr_value, size_t xattr_value_len);
+extern int ima_inode_removexattr(struct dentry *dentry, const char *xattr_name);
#else
static inline void ima_inode_post_setattr(struct dentry *dentry)
{
return;
}
+
+static inline int ima_inode_setxattr(struct dentry *dentry,
+ const char *xattr_name,
+ const void *xattr_value,
+ size_t xattr_value_len)
+{
+ return 0;
+}
+
+static inline int ima_inode_removexattr(struct dentry *dentry,
+ const char *xattr_name)
+{
+ return 0;
+}
#endif /* CONFIG_IMA_APPRAISE_H */
#endif /* _LINUX_IMA_H */