linux-kernel - [PATCH] staging: wfx: Fix a memory leak in 'wfx_upload

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Message-Id: <20191101172151.14295-1-christophe.jaillet@wanadoo.fr>
Date:   Fri,  1 Nov 2019 18:21:51 +0100
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     jerome.pouiller@...abs.com, gregkh@...uxfoundation.org
Cc:     devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH] staging: wfx: Fix a memory leak in 'wfx_upload_beacon'

The current code is a no-op, because all it can do is 'dev_kfree_skb(NULL)'
Revert the test to free skb, if not NULL.

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
This patch is purely speculative.

The 'if  (...)' could also be removed completely if we refactor the code
and return directly at the beginning of the function.
Or the 'return -ENOMEM' should be 'err = -ENOMEM; goto done;' in order to
avoid a mixup of goto and direct return.
---
 drivers/staging/wfx/sta.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/wfx/sta.c b/drivers/staging/wfx/sta.c
index 688586e823c0..e14da8dce388 100644
--- a/drivers/staging/wfx/sta.c
+++ b/drivers/staging/wfx/sta.c
@@ -906,7 +906,7 @@ static int wfx_upload_beacon(struct wfx_vif *wvif)
 	wfx_fwd_probe_req(wvif, false);
 
 done:
-	if (!skb)
+	if (skb)
 		dev_kfree_skb(skb);
 	return ret;
 }
-- 
2.20.1