linux-kernel - Re: [PATCH] staging: rtl8723au: os_dep: usb_intf.c: Fix for possible null pointer dereference

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Message-ID: <wrfjbnn4vrqa.fsf@redhat.com>
Date:	Mon, 15 Dec 2014 10:48:45 -0500
From:	Jes Sorensen <Jes.Sorensen@...hat.com>
To:	Dan Carpenter <dan.carpenter@...cle.com>
Cc:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>,
	Larry Finger <Larry.Finger@...inger.net>,
	devel@...verdev.osuosl.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: rtl8723au: os_dep: usb_intf.c: Fix for possible null pointer dereference

Dan Carpenter <dan.carpenter@...cle.com> writes:
> On Sun, Dec 14, 2014 at 11:39:14PM +0100, Rickard Strandqvist wrote:
>> There is otherwise a risk of a possible null pointer dereference.
>> 
>> Was largely found by using a static code analysis program called cppcheck.
>> 
>> Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
>> ---
>>  drivers/staging/rtl8723au/os_dep/usb_intf.c |    3 ++-
>>  1 file changed, 2 insertions(+), 1 deletion(-)
>> 
>> diff --git a/drivers/staging/rtl8723au/os_dep/usb_intf.c
>> b/drivers/staging/rtl8723au/os_dep/usb_intf.c
>> index 865743e..71a6330 100644
>> --- a/drivers/staging/rtl8723au/os_dep/usb_intf.c
>> +++ b/drivers/staging/rtl8723au/os_dep/usb_intf.c
>> @@ -351,10 +351,11 @@ error_exit:
>>  int rtw_hw_resume23a(struct rtw_adapter *padapter)
>
> That's weird.  Is this function even called?

[jes@...rasam jes.git]$ find drivers/staging/rtl8723au -name \*.[ch] |xargs grep rtw_hw_resume
drivers/staging/rtl8723au/include/osdep_intf.h:int rtw_hw_resume23a(struct rtw_adapter *padapter);
drivers/staging/rtl8723au/os_dep/usb_intf.c:int rtw_hw_resume23a(struct rtw_adapter *padapter)
drivers/staging/rtl8723au/os_dep/usb_intf.c:		DBG_8723A("==> rtw_hw_resume23a\n");
[jes@...rasam jes.git]$ find drivers/staging/rtl8723au -name \*.[ch] |xargs grep rtw_hw_suspend
drivers/staging/rtl8723au/include/osdep_intf.h:int rtw_hw_suspend23a(struct rtw_adapter *padapter);
drivers/staging/rtl8723au/os_dep/usb_intf.c:int rtw_hw_suspend23a(struct rtw_adapter *padapter)
drivers/staging/rtl8723au/os_dep/usb_intf.c:		DBG_8723A("==> rtw_hw_suspend23a\n");

A more useful patch would be one removing those two functions IMHO.

Jes
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