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authorAlexey Khoroshilov <khoroshilov@ispras.ru>2014-03-29 00:26:15 +0400
committerJohn W. Linville <linville@tuxdriver.com>2014-03-31 13:47:41 -0400
commita31267c30880ebdc73e6815f58c69a665052fab8 (patch)
treee5d0be79fbfd9de5e5d5ba49baa4fc04f4acb899
parent6cea5f2173440d324b0172373a95408323f28911 (diff)
rtl8187: fix use after free on failure path in rtl8187_probe()
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@ispras.ru> Acked-by: Larry Finger <Larry.Finger@lwfinger.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
-rw-r--r--drivers/net/wireless/rtl818x/rtl8187/dev.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/wireless/rtl818x/rtl8187/dev.c b/drivers/net/wireless/rtl818x/rtl8187/dev.c
index 2c79bcc..0ca17cd 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;
}