eCryptfs: write lock requested keys
A requested key is write locked in order to prevent modifications on the
authentication token while it is being used.
Signed-off-by: Roberto Sassu <roberto.sassu@polito.it>
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index 520d05f..c27c0ec 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -254,8 +254,10 @@
"option: [%s]\n", global_auth_tok->sig);
global_auth_tok->flags |= ECRYPTFS_AUTH_TOK_INVALID;
goto out;
- } else
+ } else {
global_auth_tok->flags &= ~ECRYPTFS_AUTH_TOK_INVALID;
+ up_write(&(global_auth_tok->global_auth_tok_key)->sem);
+ }
}
out:
return rc;