These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / fs / proc / fd.c

diff --git a/kernel/fs/proc/fd.c b/kernel/fs/proc/fd.c
index 6e5fcd0..3c2a915 100644 (file)
--- a/kernel/fs/proc/fd.c
+++ b/kernel/fs/proc/fd.c
@@ -291,11 +291,19 @@ static struct dentry *proc_lookupfd(struct inode *dir, struct dentry *dentry,
  */
 int proc_fd_permission(struct inode *inode, int mask)
 {
-       int rv = generic_permission(inode, mask);
+       struct task_struct *p;
+       int rv;
+
+       rv = generic_permission(inode, mask);
        if (rv == 0)
-               return 0;
-       if (task_tgid(current) == proc_pid(inode))
+               return rv;
+
+       rcu_read_lock();
+       p = pid_task(proc_pid(inode), PIDTYPE_PID);
+       if (p && same_thread_group(p, current))
                rv = 0;
+       rcu_read_unlock();
+
        return rv;
 }