diff options
| author | Randy Dunlap <rdunlap@infradead.org> | 2020-12-28 23:13:09 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-01-04 16:52:40 +0100 |
| commit | 718bf42b119de652ebcc93655a1f33a9c0d04b3c (patch) | |
| tree | 03a6a16e45e904c5a6e8218b75e2a306f0f0e5c3 /drivers/usb/usbip | |
| parent | 020a1f453449294926ca548d8d5ca970926e8dfd (diff) | |
usb: usbip: vhci_hcd: protect shift size
Fix shift out-of-bounds in vhci_hcd.c:
UBSAN: shift-out-of-bounds in ../drivers/usb/usbip/vhci_hcd.c:399:41
shift exponent 768 is too large for 32-bit type 'int'
Fixes: 03cd00d538a6 ("usbip: vhci-hcd: Set the vhci structure up to work")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: syzbot+297d20e437b79283bf6d@syzkaller.appspotmail.com
Cc: Yuyang Du <yuyang.du@intel.com>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20201229071309.18418-1-rdunlap@infradead.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/usbip')
| -rw-r--r-- | drivers/usb/usbip/vhci_hcd.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/usb/usbip/vhci_hcd.c b/drivers/usb/usbip/vhci_hcd.c index 66cde5e5f796..3209b5ddd30c 100644 --- a/drivers/usb/usbip/vhci_hcd.c +++ b/drivers/usb/usbip/vhci_hcd.c @@ -396,6 +396,8 @@ static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, default: usbip_dbg_vhci_rh(" ClearPortFeature: default %x\n", wValue); + if (wValue >= 32) + goto error; vhci_hcd->port_status[rhport] &= ~(1 << wValue); break; } |