Messages in this thread Patch in this message |  | | Date | Wed, 12 Nov 2014 21:33:34 -0500 | From | Mathy Vanhoef <> | Subject | [PATCH] brcmfmac: kill URB when request timed out |
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Kill the submitted URB in brcmf_usb_dl_cmd if the request timed out. This assures the URB is never submitted twice. It also prevents a possible use-after-free of the URB transfer buffer if a timeout occurs.
Signed-off-by: Mathy Vanhoef <vanhoefm@gmail.com> --- For a discussion about this patch and the underlying problem, see the mails with as subject "[PATCH] brcmfmac: unlink URB when request timed out".
drivers/net/wireless/brcm80211/brcmfmac/usb.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/usb.c b/drivers/net/wireless/brcm80211/brcmfmac/usb.c index 5265aa7..4572def 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/usb.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/usb.c @@ -738,10 +738,12 @@ static int brcmf_usb_dl_cmd(struct brcmf_usbdev_info *devinfo, u8 cmd, goto finalize; } - if (!brcmf_usb_ioctl_resp_wait(devinfo)) + if (!brcmf_usb_ioctl_resp_wait(devinfo)) { + usb_kill_urb(devinfo->ctl_urb); ret = -ETIMEDOUT; - else + } else { memcpy(buffer, tmpbuf, buflen); + } finalize: kfree(tmpbuf); -- 1.7.10.4
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