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  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]
Date:	Thu, 19 Jun 2014 08:03:46 -0400
From:	Stephen Smalley <sds@...ho.nsa.gov>
To:	Paul Moore <paul@...l-moore.com>,
	Namhyung Kim <namhyung@...nel.org>
CC:	Eric Paris <eparis@...isplace.org>, selinux@...ho.nsa.gov,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] selinux: simple cleanup for cond_read_node()

On 06/18/2014 03:36 PM, Paul Moore wrote:
> On Sunday, June 15, 2014 01:19:01 AM Namhyung Kim wrote:
>> The node->cur_state and len can be read in a single call of next_entry().
>> And setting len before reading is a dead write so can be eliminated.
>>
>> Signed-off-by: Namhyung Kim <namhyung@...nel.org>
>> ---
>>  security/selinux/ss/conditional.c | 9 ++-------
>>  1 file changed, 2 insertions(+), 7 deletions(-)
>>
>> diff --git a/security/selinux/ss/conditional.c
>> b/security/selinux/ss/conditional.c index 377d148e7157..4766a38fae9a 100644
>> --- a/security/selinux/ss/conditional.c
>> +++ b/security/selinux/ss/conditional.c
>> @@ -402,19 +402,14 @@ static int cond_read_node(struct policydb *p, struct
>> cond_node *node, void *fp) int rc;
>>  	struct cond_expr *expr = NULL, *last = NULL;
>>
>> -	rc = next_entry(buf, fp, sizeof(u32));
>> +	rc = next_entry(buf, fp, sizeof(buf));
> 
> This is a bit nit-picky, but how about using "sizeof(u32) * 2"?  It is more 
> consistent with the rest of the function and helps underscore that we are 

Concur - I don't want to assume that the buf size is always the same as
the next read size (e.g. we sometimes use the same buf for multiple reads).



--
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/

Powered by blists - more mailing lists