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Subject[PATCH] staging: wlan-ng: fix leaks on failure paths in prism2sta_probe_usb()
Date
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@ispras.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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