check_unsafe_exec() doesn't care about signal handlers sharing

... since we'll unshare sighand anyway

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 2 insertions, 5 deletions

diff --git a/fs/exec.c b/fs/exec.c
index 07a059664b73..614991bf0c87 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1060,23 +1060,20 @@ int check_unsafe_exec(struct linux_binprm *bprm)
 {
         struct task_struct *p = current, *t;
         unsigned long flags;
-        unsigned n_fs, n_sighand;
+        unsigned n_fs;
         int res = 0;
 
         bprm->unsafe = tracehook_unsafe_exec(p);
 
         n_fs = 1;
-        n_sighand = 1;
         write_lock(&p->fs->lock);
         lock_task_sighand(p, &flags);
         for (t = next_thread(p); t != p; t = next_thread(t)) {
                 if (t->fs == p->fs)
                         n_fs++;
-                n_sighand++;
         }
 
-        if (p->fs->users > n_fs ||
-            atomic_read(&p->sighand->count) > n_sighand) {
+        if (p->fs->users > n_fs) {
                 bprm->unsafe |= LSM_UNSAFE_SHARE;
         } else {
                 if (p->fs->in_exec)