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Message-Id: <1389388931-18832-1-git-send-email-khoroshilov@ispras.ru>
Date: Sat, 11 Jan 2014 01:22:11 +0400
From: Alexey Khoroshilov <khoroshilov@...ras.ru>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Alexey Khoroshilov <khoroshilov@...ras.ru>,
devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
ldv-project@...uxtesting.org
Subject: [PATCH] staging: wlan-ng: fix leaks on failure paths in prism2sta_probe_usb()
There are leaks of resources allocated by wlan_setup() and usb_dev refcnt
on failure paths in prism2sta_probe_usb().
The patch adds appropriate deallocations and removes invalid code
from hfa384x_corereset() failure handling.
unregister_wlandev() is wrong because it is not registered yet.
hfa384x_destroy() is just noop in init state.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Alexey Khoroshilov <khoroshilov@...ras.ru>
---
drivers/staging/wlan-ng/prism2usb.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/staging/wlan-ng/prism2usb.c b/drivers/staging/wlan-ng/prism2usb.c
index b401974fb282..4739c14d8359 100644
--- a/drivers/staging/wlan-ng/prism2usb.c
+++ b/drivers/staging/wlan-ng/prism2usb.c
@@ -140,11 +140,9 @@ static int prism2sta_probe_usb(struct usb_interface *interface,
prism2_reset_holdtime,
prism2_reset_settletime, 0);
if (result != 0) {
- unregister_wlandev(wlandev);
- hfa384x_destroy(hw);
result = -EIO;
dev_err(&interface->dev, "hfa384x_corereset() failed.\n");
- goto failed;
+ goto failed_reset;
}
}
@@ -159,11 +157,15 @@ static int prism2sta_probe_usb(struct usb_interface *interface,
if (register_wlandev(wlandev) != 0) {
dev_err(&interface->dev, "register_wlandev() failed.\n");
result = -EIO;
- goto failed;
+ goto failed_register;
}
goto done;
+failed_register:
+ usb_put_dev(dev);
+failed_reset:
+ wlan_unsetup(wlandev);
failed:
kfree(wlandev);
kfree(hw);
--
1.8.3.2
--
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