[Linux-ima-user] [PATCH] ima: allow to check MAY_APPEND

[Lans Z. <jia...@wi...>]

Otherwise some mask and inmask tokens with MAY_APPEND flag may not work
as expected.

Signed-off-by: Lans Zhang <jia...@wi...>
---
 security/integrity/ima/ima_api.c  | 3 ++-
 security/integrity/ima/ima_main.c | 5 +++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/security/integrity/ima/ima_api.c b/security/integrity/ima/ima_api.c
index 9df26a2..b827875 100644
--- a/security/integrity/ima/ima_api.c
+++ b/security/integrity/ima/ima_api.c
@@ -157,7 +157,8 @@ void ima_add_violation(struct file *file, const unsigned char *filename,
 /**
  * ima_get_action - appraise & measure decision based on policy.
  * @inode: pointer to inode to measure
- * @mask: contains the permission mask (MAY_READ, MAY_WRITE, MAY_EXECUTE)
+ * @mask: contains the permission mask (MAY_READ, MAY_WRITE, MAY_EXEC,
+ *        MAY_APPEND)
  * @func: caller identifier
  * @pcr: pointer filled in if matched measure policy sets pcr=
  *
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
index 50818c6..9fbcd8c 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -307,7 +307,7 @@ int ima_bprm_check(struct linux_binprm *bprm)
 /**
  * ima_path_check - based on policy, collect/store measurement.
  * @file: pointer to the file to be measured
- * @mask: contains MAY_READ, MAY_WRITE or MAY_EXECUTE
+ * @mask: contains MAY_READ, MAY_WRITE, MAY_EXEC or MAY_APPEND
  *
  * Measure files based on the ima_must_measure() policy decision.
  *
@@ -317,7 +317,8 @@ int ima_bprm_check(struct linux_binprm *bprm)
 int ima_file_check(struct file *file, int mask, int opened)
 {
 	return process_measurement(file, NULL, 0,
-				   mask & (MAY_READ | MAY_WRITE | MAY_EXEC),
+				   mask & (MAY_READ | MAY_WRITE | MAY_EXEC |
+				           MAY_APPEND),
 				   FILE_CHECK, opened);
 }
 EXPORT_SYMBOL_GPL(ima_file_check);
-- 
1.9.1