| Message ID | 20241026102740.2653458-1-yiyang13@huawei.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | usb: gadget: udc: fix possible null-ptr-deref in mv_u3d_req_to_trb() | expand |
On Sat, Oct 26, 2024 at 10:27:40AM +0000, Yi Yang wrote: > The mv_u3d_build_trb_one() will return NULL when kzalloc() fails, fix > possible null-ptr-deref by add check for mv_u3d_build_trb_one(). > > Fixes: 3d4eb9dfa3e8 ("usb: gadget: mv: Add USB 3.0 device driver for Marvell PXA2128 chip.") > Signed-off-by: Yi Yang <yiyang13@huawei.com> > --- > drivers/usb/gadget/udc/mv_u3d_core.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/usb/gadget/udc/mv_u3d_core.c b/drivers/usb/gadget/udc/mv_u3d_core.c > index 062f43e146aa..c882c377c4f4 100644 > --- a/drivers/usb/gadget/udc/mv_u3d_core.c > +++ b/drivers/usb/gadget/udc/mv_u3d_core.c > @@ -417,6 +417,8 @@ static int mv_u3d_req_to_trb(struct mv_u3d_req *req) > */ > if (length <= (unsigned)MV_U3D_EP_MAX_LENGTH_TRANSFER) { > trb = mv_u3d_build_trb_one(req, &count, &dma); > + if (!trb) > + return -ENOMEM; > list_add_tail(&trb->trb_list, &req->trb_list); > req->trb_head = trb; > req->trb_count = 1; > -- > 2.25.1 > > How was this tested to verify it works properly? thanks,. greg k-h
diff --git a/drivers/usb/gadget/udc/mv_u3d_core.c b/drivers/usb/gadget/udc/mv_u3d_core.c index 062f43e146aa..c882c377c4f4 100644 --- a/drivers/usb/gadget/udc/mv_u3d_core.c +++ b/drivers/usb/gadget/udc/mv_u3d_core.c @@ -417,6 +417,8 @@ static int mv_u3d_req_to_trb(struct mv_u3d_req *req) */ if (length <= (unsigned)MV_U3D_EP_MAX_LENGTH_TRANSFER) { trb = mv_u3d_build_trb_one(req, &count, &dma); + if (!trb) + return -ENOMEM; list_add_tail(&trb->trb_list, &req->trb_list); req->trb_head = trb; req->trb_count = 1;
The mv_u3d_build_trb_one() will return NULL when kzalloc() fails, fix possible null-ptr-deref by add check for mv_u3d_build_trb_one(). Fixes: 3d4eb9dfa3e8 ("usb: gadget: mv: Add USB 3.0 device driver for Marvell PXA2128 chip.") Signed-off-by: Yi Yang <yiyang13@huawei.com> --- drivers/usb/gadget/udc/mv_u3d_core.c | 2 ++ 1 file changed, 2 insertions(+)