1 files changed, 12 insertions, 4 deletions

diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index b4265aa7d45e..487ff672b104 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -30,6 +30,8 @@
  *  Revision history
  *    22.12.1999   0.1   Initial release (split from proc_usb.c)
  *    04.01.2000   0.2   Turned into its own filesystem
+ *    30.09.2005   0.3   Fix user-triggerable oops in async URB delivery
+ *                       (CAN-2005-3055)
  */
 
 /*****************************************************************************/
@@ -58,7 +60,8 @@ static struct class *usb_device_class;
 struct async {
         struct list_head asynclist;
         struct dev_state *ps;
-        struct task_struct *task;
+        pid_t pid;
+        uid_t uid, euid;
         unsigned int signr;
         unsigned int ifnum;
         void __user *userbuffer;
@@ -290,7 +293,8 @@ static void async_completed(struct urb *urb, struct pt_regs *regs)
                 sinfo.si_errno = as->urb->status;
                 sinfo.si_code = SI_ASYNCIO;
                 sinfo.si_addr = as->userurb;
-                send_sig_info(as->signr, &sinfo, as->task);
+                kill_proc_info_as_uid(as->signr, &sinfo, as->pid, as->uid, 
+                                      as->euid);
         }
         wake_up(&ps->wait);
 }
@@ -526,7 +530,9 @@ static int usbdev_open(struct inode *inode, struct file *file)
         INIT_LIST_HEAD(&ps->async_completed);
         init_waitqueue_head(&ps->wait);
         ps->discsignr = 0;
-        ps->disctask = current;
+        ps->disc_pid = current->pid;
+        ps->disc_uid = current->uid;
+        ps->disc_euid = current->euid;
         ps->disccontext = NULL;
         ps->ifclaimed = 0;
         wmb();
@@ -988,7 +994,9 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
                 as->userbuffer = NULL;
         as->signr = uurb->signr;
         as->ifnum = ifnum;
-        as->task = current;
+        as->pid = current->pid;
+        as->uid = current->uid;
+        as->euid = current->euid;
         if (!(uurb->endpoint & USB_DIR_IN)) {
                 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) {
                         free_async(as);