patch "USB: EHCI: declare hostpc register as zero-length array" added to usb-linus

This is a note to let you know that I've just added the patch titled

USB: EHCI: declare hostpc register as zero-length array

to my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From: Alan Stern <[email protected]>
Date: Thu, 23 Jun 2016 14:54:37 -0400
Subject: USB: EHCI: declare hostpc register as zero-length array

The HOSTPC extension registers found in some EHCI implementations form a variable-length array, with one element for each port. Therefore the hostpc field in struct ehci_regs should be declared as a zero-length array, not a single-element array.

This fixes a problem reported by UBSAN.

---
 include/linux/usb/ehci_def.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

index 966889a20ea3..e479033bd782 100644
@@ -180,11 +180,11 @@ struct ehci_regs {
  * PORTSCx
  */
 	/* HOSTPC: offset 0x84 */
-	u32		hostpc[1];	/* HOSTPC extension */
+	u32		hostpc[0];	/* HOSTPC extension */
 #define HOSTPC_PHCD	(1<<22)		/* Phy clock disable */
 #define HOSTPC_PSPD	(3<<25)		/* Port speed detection */
 
-	u32		reserved5[16];
+	u32		reserved5[17];
 
 	/* USBMODE_EX: offset 0xc8 */
 	u32		usbmode_ex;	/* USB Device mode extension */

2.9.0