queue-6.8/usb-dwc2-host-fix-dereference-issue-in-ddma-completion-flow.patch

   1 From eed04fa96c48790c1cce73c8a248e9d460b088f8 Mon Sep 17 00:00:00 2001
   2 From: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
   3 Date: Tue, 9 Apr 2024 12:27:54 +0000
   4 Subject: usb: dwc2: host: Fix dereference issue in DDMA completion flow.
   5
   6 From: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
   7
   8 commit eed04fa96c48790c1cce73c8a248e9d460b088f8 upstream.
   9
  10 Fixed variable dereference issue in DDMA completion flow.
  11
  12 Fixes: b258e4268850 ("usb: dwc2: host: Fix ISOC flow in DDMA mode")
  13 CC: stable@vger.kernel.org
  14 Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
  15 Closes: https://lore.kernel.org/linux-usb/2024040834-ethically-rumble-701f@gregkh/T/#m4c4b83bef0ebb4b67fe2e0a7d6466cbb6f416e39
  16 Signed-off-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
  17 Link: https://lore.kernel.org/r/cc826d3ef53c934d8e6d98870f17f3cdc3d2755d.1712665387.git.Minas.Harutyunyan@synopsys.com
  18 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  19 ---
  20  drivers/usb/dwc2/hcd_ddma.c |    4 +++-
  21  1 file changed, 3 insertions(+), 1 deletion(-)
  22
  23 --- a/drivers/usb/dwc2/hcd_ddma.c
  24 +++ b/drivers/usb/dwc2/hcd_ddma.c
  25 @@ -867,13 +867,15 @@ static int dwc2_cmpl_host_isoc_dma_desc(
  26         struct dwc2_dma_desc *dma_desc;
  27         struct dwc2_hcd_iso_packet_desc *frame_desc;
  28         u16 frame_desc_idx;
  29 -       struct urb *usb_urb = qtd->urb->priv;
  30 +       struct urb *usb_urb;
  31         u16 remain = 0;
  32         int rc = 0;
  33
  34         if (!qtd->urb)
  35                 return -EINVAL;
  36
  37 +       usb_urb = qtd->urb->priv;
  38 +
  39         dma_sync_single_for_cpu(hsotg->dev, qh->desc_list_dma + (idx *
  40                                 sizeof(struct dwc2_dma_desc)),
  41                                 sizeof(struct dwc2_dma_desc),