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-rw-r--r--security/integrity/ima/ima_main.c25
1 files changed, 24 insertions, 1 deletions
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
index 391f41751021..68b26c340acd 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -246,7 +246,8 @@ static int process_measurement(struct file *file, char *buf, loff_t size,
ima_audit_measurement(iint, pathname);
out_digsig:
- if ((mask & MAY_WRITE) && (iint->flags & IMA_DIGSIG))
+ if ((mask & MAY_WRITE) && (iint->flags & IMA_DIGSIG) &&
+ !(iint->flags & IMA_NEW_FILE))
rc = -EACCES;
kfree(xattr_value);
out_free:
@@ -316,6 +317,28 @@ int ima_file_check(struct file *file, int mask, int opened)
EXPORT_SYMBOL_GPL(ima_file_check);
/**
+ * ima_post_path_mknod - mark as a new inode
+ * @dentry: newly created dentry
+ *
+ * Mark files created via the mknodat syscall as new, so that the
+ * file data can be written later.
+ */
+void ima_post_path_mknod(struct dentry *dentry)
+{
+ struct integrity_iint_cache *iint;
+ struct inode *inode = dentry->d_inode;
+ int must_appraise;
+
+ must_appraise = ima_must_appraise(inode, MAY_ACCESS, FILE_CHECK);
+ if (!must_appraise)
+ return;
+
+ iint = integrity_inode_get(inode);
+ if (iint)
+ iint->flags |= IMA_NEW_FILE;
+}
+
+/**
* ima_read_file - pre-measure/appraise hook decision based on policy
* @file: pointer to the file to be measured/appraised/audit
* @read_id: caller identifier