[PATCH] file: modify struct fown_struct to use a struct pid

File handles can be requested to send sigio and sigurg to processes.  By
tracking the destination processes using struct pid instead of pid_t we make
the interface safe from all potential pid wrap around problems.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index bc0face01d25..151a2e10e4f3 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -697,7 +697,7 @@ static int tun_chr_fasync(int fd, struct file *file, int on)
                 return ret;
 
         if (on) {
-                ret = f_setown(file, current->pid, 0);
+                ret = __f_setown(file, task_pid(current), PIDTYPE_PID, 0);
                 if (ret)
                         return ret;
                 tun->flags |= TUN_FASYNC;