commit f9ce1f1cda8b73a36f47e424975a9dfa78b7840c
author Kentaro Takeda <takedakn@nttdata.co.jp> Thu Feb 05 17:18:11 2009 +0900
committer James Morris <jmorris@namei.org> Thu Feb 12 15:15:03 2009 +1100
tree 66138b33dbf627f99f5ec67e0e39ce15ab830080
parent 523979adfa0b79d4e3aa053220c37a9233294206

Add in_execve flag into task_struct.

This patch allows LSM modules to determine whether current process is in an
execve operation or not so that they can behave differently while an execve
operation is in progress.

This patch is needed by TOMOYO. Please see another patch titled "LSM adapter
functions." for backgrounds.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>

fs/exec.c

diff --git a/fs/exec.c b/fs/exec.c
index febfd8ed..9881dc3 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1278,6 +1278,7 @@
 	retval = mutex_lock_interruptible(&current->cred_exec_mutex);
 	if (retval < 0)
 		goto out_free;
+	current->in_execve = 1;
 
 	retval = -ENOMEM;
 	bprm->cred = prepare_exec_creds();
@@ -1331,6 +1332,7 @@
 		goto out;
 
 	/* execve succeeded */
+	current->in_execve = 0;
 	mutex_unlock(&current->cred_exec_mutex);
 	acct_update_integrals(current);
 	free_bprm(bprm);
@@ -1349,6 +1351,7 @@
 	}
 
 out_unlock:
+	current->in_execve = 0;
 	mutex_unlock(&current->cred_exec_mutex);
 
 out_free: