linux-kernel - [PATCH v1] staging: r8188eu: an incorrect return value made the function always return fail

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220620085413.948265-1-hpa@redhat.com>
Date:   Mon, 20 Jun 2022 16:54:13 +0800
From:   Kate Hsuan <hpa@...hat.com>
To:     Hans de Goede <hdegoede@...hat.com>,
        Larry Finger <Larry.Finger@...inger.net>,
        Phillip Potter <phil@...lpotter.co.uk>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Michael Straube <straube.linux@...il.com>,
        "Fabio M . De Francesco" <fmdefrancesco@...il.com>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org
Cc:     Kate Hsuan <hpa@...hat.com>
Subject: [PATCH v1] staging: r8188eu: an incorrect return value made the function always return fail

Since _SUCCESS (1) and _FAIL (0) are used to indicate the status of the
functions. The previous commit 8ae7bf782eacad803f752c83a183393b0a67127b
fixed and prevented dereferencing a NULL pointer through checking the
return pointer. The NULL pointer check work properly but the return
values (-ENOMEM on fail and 0 on success). This work fixed the return
values to make sure the caller function will return the correct status.

BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=2097526
Signed-off-by: Kate Hsuan <hpa@...hat.com>
---
 drivers/staging/r8188eu/core/rtw_xmit.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/r8188eu/core/rtw_xmit.c b/drivers/staging/r8188eu/core/rtw_xmit.c
index f4e9f6102539..2f8720db21d9 100644
--- a/drivers/staging/r8188eu/core/rtw_xmit.c
+++ b/drivers/staging/r8188eu/core/rtw_xmit.c
@@ -180,10 +180,8 @@ s32	_rtw_init_xmit_priv(struct xmit_priv *pxmitpriv, struct adapter *padapter)
 	pxmitpriv->free_xmit_extbuf_cnt = num_xmit_extbuf;
 
 	res = rtw_alloc_hwxmits(padapter);
-	if (res) {
-		res = _FAIL;
+	if (res == _FAIL)
 		goto exit;
-	}
 
 	rtw_init_hwxmits(pxmitpriv->hwxmits, pxmitpriv->hwxmit_entry);
 
@@ -1510,7 +1508,7 @@ int rtw_alloc_hwxmits(struct adapter *padapter)
 
 	pxmitpriv->hwxmits = kzalloc(sizeof(struct hw_xmit) * pxmitpriv->hwxmit_entry, GFP_KERNEL);
 	if (!pxmitpriv->hwxmits)
-		return -ENOMEM;
+		return _FAIL;
 
 	hwxmits = pxmitpriv->hwxmits;
 
@@ -1528,7 +1526,7 @@ int rtw_alloc_hwxmits(struct adapter *padapter)
 	} else {
 	}
 
-	return 0;
+	return _SUCCESS;
 }
 
 void rtw_free_hwxmits(struct adapter *padapter)
-- 
2.36.1