linux-kernel - Re: [PATCH 3/9] staging: otus: check kmalloc() return value

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

Message-ID: <4C52CA55.4000204@gmail.com>
Date:	Fri, 30 Jul 2010 14:49:25 +0200
From:	Jiri Slaby <jirislaby@...il.com>
To:	wharms@....de
CC:	Kulikov Vasiliy <segooon@...il.com>, devel@...verdev.osuosl.org,
	Greg Kroah-Hartman <gregkh@...e.de>,
	kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org,
	Tejun Heo <tj@...nel.org>
Subject: Re: [PATCH 3/9] staging: otus: check kmalloc() return value

On 07/30/2010 02:31 PM, walter harms wrote:
> 
> 
> Kulikov Vasiliy schrieb:
>> kmalloc() may fail, if so return error from zfwUsbSubmitControl().
>>
>> Signed-off-by: Kulikov Vasiliy <segooon@...il.com>
>> ---
>>  drivers/staging/otus/wrap_usb.c |    5 +++++
>>  1 files changed, 5 insertions(+), 0 deletions(-)
>>
>> diff --git a/drivers/staging/otus/wrap_usb.c b/drivers/staging/otus/wrap_usb.c
>> index 93459ca..9f04047 100644
>> --- a/drivers/staging/otus/wrap_usb.c
>> +++ b/drivers/staging/otus/wrap_usb.c
>> @@ -104,6 +104,11 @@ u32_t zfwUsbSubmitControl(zdev_t *dev, u8_t req, u16_t value, u16_t index,
>>  
>>  	if (size > 0) {
>>  		buf = kmalloc(size, GFP_KERNEL);
>> +		if (buf == NULL) {
>> +			pr_err("zfwUsbSubmitControl() failed, "
>> +				  "kmalloc() returned NULL\n");
>> +			return 1;
>> +		}
>>  		memcpy(buf, (u8_t *)data, size);
>>  	} else
>>  		buf = NULL;
> 
> 
> We had a memdup() somewhere had'nt we ?

Yes, but it is not what he is changing. (Patches welcome.)

The patch is OK, except try to avoid function names in printks next
time. Function names are constantly changing, but developers tend not to
change printk strings. (%s + __func__)

regards,
-- 
js
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/