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| author | Heinrich Schuchardt <xypron.glpk@gmx.de> | 2018-03-29 18:48:28 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-24 10:36:23 +0300 |
| commit | 334d8f201ef5f9c32ab26fbc868952ffb86dc175 (patch) | |
| tree | 124447a4ca3b37bf8251d580c87f7038d065bb70 /drivers/usb/musb/musb_gadget_ep0.c | |
| parent | 20eaa393fcd32fe48f2e13ce649e90a48a446fe6 (diff) | |
| download | linux-334d8f201ef5f9c32ab26fbc868952ffb86dc175.tar.xz | |
usb: musb: gadget: misplaced out of bounds check
commit af6f8529098aeb0e56a68671b450cf74e7a64fcd upstream.
musb->endpoints[] has array size MUSB_C_NUM_EPS.
We must check array bounds before accessing the array and not afterwards.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Bin Liu <b-liu@ti.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/musb/musb_gadget_ep0.c')
| -rw-r--r-- | drivers/usb/musb/musb_gadget_ep0.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/usb/musb/musb_gadget_ep0.c b/drivers/usb/musb/musb_gadget_ep0.c index 844a309fe895..e85b9c2a4910 100644 --- a/drivers/usb/musb/musb_gadget_ep0.c +++ b/drivers/usb/musb/musb_gadget_ep0.c @@ -114,15 +114,19 @@ static int service_tx_status_request( } is_in = epnum & USB_DIR_IN; - if (is_in) { - epnum &= 0x0f; + epnum &= 0x0f; + if (epnum >= MUSB_C_NUM_EPS) { + handled = -EINVAL; + break; + } + + if (is_in) ep = &musb->endpoints[epnum].ep_in; - } else { + else ep = &musb->endpoints[epnum].ep_out; - } regs = musb->endpoints[epnum].regs; - if (epnum >= MUSB_C_NUM_EPS || !ep->desc) { + if (!ep->desc) { handled = -EINVAL; break; } |