From a31267c30880ebdc73e6815f58c69a665052fab8 Mon Sep 17 00:00:00 2001 From: Alexey Khoroshilov Date: Sat, 29 Mar 2014 00:26:15 +0400 Subject: [PATCH] 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 Acked-by: Larry Finger Signed-off-by: John W. Linville --- 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 2c79bcc6ae65..0ca17cda48fa 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; } -- GitLab