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Date: Tue, 8 Apr 2014 01:12:44 +0100 (BST) From: Hin-Tak Leung <htl10@...rs.sourceforge.net> To: larry.finger@...inger.net, khoroshilov@...ras.ru, herton@...onical.com Cc: linville@...driver.com, linux-wireless@...r.kernel.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, ldv-project@...uxtesting.org Subject: Re: [PATCH] rtl8187: fix use after free on failure path in rtl8187_probe() ------------------------------ On Sun, Mar 30, 2014 10:31 PM BST Larry Finger wrote: >On 03/28/2014 03:26 PM, Alexey Khoroshilov wrote: > If allocation of io_dmabuf fails, rtl8187_probe() calls usb_put_dev(udev) > while usb_get_dev(udev) is not called yet. As a result refcnt is decremented > incorrectly and usb_dev can be used after memory deallocation. > > Found by Linux Driver Verification project (linuxtesting.org). > > Signed-off-by: Alexey Khoroshilov <khoroshilov@...ras.ru> > --- > >Acked-by: Larry Finger <Larry.Finger@...inger.net> > >Thanks, > >Larry Acked-by: Hin-Tak Leung <htl10@...rs.sourceforge.net> Hin-Tak > > drivers/net/wireless/rtl818x/rtl8187/dev.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/net/wireless/rtl818x/rtl8187/dev.c b/drivers/net/wireless/rtl818x/rtl8187/dev.c > index fd78df813a85..d7f540a9dc9b 100644 > --- a/drivers/net/wireless/rtl818x/rtl8187/dev.c > +++ b/drivers/net/wireless/rtl818x/rtl8187/dev.c > @@ -1636,10 +1636,10 @@ static int rtl8187_probe(struct usb_interface *intf, > > err_free_dmabuf: > kfree(priv->io_dmabuf); > - err_free_dev: > - ieee80211_free_hw(dev); > usb_set_intfdata(intf, NULL); > usb_put_dev(udev); > + err_free_dev: > + ieee80211_free_hw(dev); > return err; > } > > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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