From df5b512d214010c96abf3e453bb7264d1d1a8352 Mon Sep 17 00:00:00 2001
From: Oleg Nesterov <oleg@redhat.com>
Date: Fri, 24 Apr 2009 01:02:45 +0200
Subject: [PATCH] --- yaml --- r: 143830 b: refs/heads/master c:
 437f7fdb607f32b737e4da9f14bebcfdac2c90c3 h: refs/heads/master v: v3

---
 [refs]          | 2 +-
 trunk/fs/exec.c | 6 ++----
 2 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/[refs] b/[refs]
index 55912739ebe4..ccbc22c232ce 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 8c652f96d3852b97a49c331cd0bb02d22f3cb31b
+refs/heads/master: 437f7fdb607f32b737e4da9f14bebcfdac2c90c3
diff --git a/trunk/fs/exec.c b/trunk/fs/exec.c
index a2e6989dbc3a..a3a8ce83940f 100644
--- a/trunk/fs/exec.c
+++ b/trunk/fs/exec.c
@@ -1060,7 +1060,6 @@ EXPORT_SYMBOL(install_exec_creds);
 int check_unsafe_exec(struct linux_binprm *bprm)
 {
 	struct task_struct *p = current, *t;
-	unsigned long flags;
 	unsigned n_fs;
 	int res = 0;
 
@@ -1068,11 +1067,12 @@ int check_unsafe_exec(struct linux_binprm *bprm)
 
 	n_fs = 1;
 	write_lock(&p->fs->lock);
-	lock_task_sighand(p, &flags);
+	rcu_read_lock();
 	for (t = next_thread(p); t != p; t = next_thread(t)) {
 		if (t->fs == p->fs)
 			n_fs++;
 	}
+	rcu_read_unlock();
 
 	if (p->fs->users > n_fs) {
 		bprm->unsafe |= LSM_UNSAFE_SHARE;
@@ -1083,8 +1083,6 @@ int check_unsafe_exec(struct linux_binprm *bprm)
 			res = 1;
 		}
 	}
-
-	unlock_task_sighand(p, &flags);
 	write_unlock(&p->fs->lock);
 
 	return res;