package/kernel/mac80211/patches/305-v4.15-brcmfmac-change-driver-unbind-order-of-the-sdio-func.patch

   1 From 5c3de777bdaf48bd0cfb43097c0d0fb85056cab7 Mon Sep 17 00:00:00 2001
   2 From: Arend Van Spriel <arend.vanspriel@broadcom.com>
   3 Date: Sat, 25 Nov 2017 21:39:25 +0100
   4 Subject: [PATCH] brcmfmac: change driver unbind order of the sdio function
   5  devices
   6
   7 In the function brcmf_sdio_firmware_callback() the driver is
   8 unbound from the sdio function devices in the error path.
   9 However, the order in which it is done resulted in a use-after-free
  10 issue (see brcmf_ops_sdio_remove() in bcmsdh.c). Hence change
  11 the order and first unbind sdio function #2 device and then
  12 unbind sdio function #1 device.
  13
  14 Cc: stable@vger.kernel.org # v4.12.x
  15 Fixes: 7a51461fc2da ("brcmfmac: unbind all devices upon failure in firmware callback")
  16 Reported-by: Stefan Wahren <stefan.wahren@i2se.com>
  17 Reviewed-by: Hante Meuleman <hante.meuleman@broadcom.com>
  18 Reviewed-by: Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com>
  19 Reviewed-by: Franky Lin <franky.lin@broadcom.com>
  20 Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
  21 Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
  22 ---
  23  drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c | 2 +-
  24  1 file changed, 1 insertion(+), 1 deletion(-)
  25
  26 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
  27 +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
  28 @@ -4121,8 +4121,8 @@ release:
  29         sdio_release_host(sdiodev->func[1]);
  30  fail:
  31         brcmf_dbg(TRACE, "failed: dev=%s, err=%d\n", dev_name(dev), err);
  32 -       device_release_driver(dev);
  33         device_release_driver(&sdiodev->func[2]->dev);
  34 +       device_release_driver(dev);
  35  }
  36
  37  struct brcmf_sdio *brcmf_sdio_probe(struct brcmf_sdio_dev *sdiodev)