Merge branch 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

* 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (260 commits)
  usb: renesas_usbhs: fixup inconsistent return from usbhs_pkt_push()
  usb/isp1760: Allow to optionally trigger low-level chip reset via GPIOLIB.
  USB: gadget: midi: memory leak in f_midi_bind_config()
  USB: gadget: midi: fix range check in f_midi_out_open()
  QE/FHCI: fixed the CONTROL bug
  usb: renesas_usbhs: tidyup for smatch warnings
  USB: Fix USB Kconfig dependency problem on 85xx/QoirQ platforms
  EHCI: workaround for MosChip controller bug
  usb: gadget: file_storage: fix race on unloading
  USB: ftdi_sio.c: Use ftdi async_icount structure for TIOCMIWAIT, as in other drivers
  USB: ftdi_sio.c:Fill MSR fields of the ftdi async_icount structure
  USB: ftdi_sio.c: Fill LSR fields of the ftdi async_icount structure
  USB: ftdi_sio.c:Fill TX field of the ftdi async_icount structure
  USB: ftdi_sio.c: Fill the RX field of the ftdi async_icount structure
  USB: ftdi_sio.c: Basic icount infrastructure for ftdi_sio
  usb/isp1760: Let OF bindings depend on general CONFIG_OF instead of PPC_OF .
  USB: ftdi_sio: Support TI/Luminary Micro Stellaris BD-ICDI Board
  USB: Fix runtime wakeup on OHCI
  xHCI/USB: Make xHCI driver have a BOS descriptor.
  usb: gadget: add new usb gadget for ACM and mass storage
  ...

1 files changed, 16 insertions, 8 deletions

diff --git a/kernel/signal.c b/kernel/signal.c
index 291c9700be75..d252be2d3de5 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1344,13 +1344,24 @@ int kill_proc_info(int sig, struct siginfo *info, pid_t pid)
 	return error;
 }
 
+static int kill_as_cred_perm(const struct cred *cred,
+			     struct task_struct *target)
+{
+	const struct cred *pcred = __task_cred(target);
+	if (cred->user_ns != pcred->user_ns)
+		return 0;
+	if (cred->euid != pcred->suid && cred->euid != pcred->uid &&
+	    cred->uid  != pcred->suid && cred->uid  != pcred->uid)
+		return 0;
+	return 1;
+}
+
 /* like kill_pid_info(), but doesn't use uid/euid of "current" */
-int kill_pid_info_as_uid(int sig, struct siginfo *info, struct pid *pid,
-		      uid_t uid, uid_t euid, u32 secid)
+int kill_pid_info_as_cred(int sig, struct siginfo *info, struct pid *pid,
+			 const struct cred *cred, u32 secid)
 {
 	int ret = -EINVAL;
 	struct task_struct *p;
-	const struct cred *pcred;
 	unsigned long flags;
 
 	if (!valid_signal(sig))
@@ -1362,10 +1373,7 @@ int kill_pid_info_as_uid(int sig, struct siginfo *info, struct pid *pid,
 		ret = -ESRCH;
 		goto out_unlock;
 	}
-	pcred = __task_cred(p);
-	if (si_fromuser(info) &&
-	    euid != pcred->suid && euid != pcred->uid &&
-	    uid  != pcred->suid && uid  != pcred->uid) {
+	if (si_fromuser(info) && !kill_as_cred_perm(cred, p)) {
 		ret = -EPERM;
 		goto out_unlock;
 	}
@@ -1384,7 +1392,7 @@ out_unlock:
 	rcu_read_unlock();
 	return ret;
 }
-EXPORT_SYMBOL_GPL(kill_pid_info_as_uid);
+EXPORT_SYMBOL_GPL(kill_pid_info_as_cred);
 
 /*
  * kill_something_info() interprets pid in interesting ways just like kill(2).