diff mbox

[4/5] net/netlabel: Add kmalloc NULL tests

Message ID Pine.LNX.4.64.0907301637570.8734@ask.diku.dk
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Julia Lawall July 30, 2009, 2:38 p.m. UTC
From: Julia Lawall <julia@diku.dk>

The test on map4 should be a test on map6.

The semantic match that finds this problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@@
expression *x;
identifier f;
constant char *C;
@@

x = \(kmalloc\|kcalloc\|kzalloc\)(...);
... when != x == NULL
    when != x != NULL
    when != (x || ...)
(
kfree(x)
|
f(...,C,...,x,...)
|
*f(...,x,...)
|
*x->f
)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>

---
 net/netlabel/netlabel_kapi.c        |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

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Comments

Paul Moore July 30, 2009, 2:53 p.m. UTC | #1
On Thursday 30 July 2009 10:38:19 am Julia Lawall wrote:
> From: Julia Lawall <julia@diku.dk>
>
> The test on map4 should be a test on map6.
>
> The semantic match that finds this problem is as follows:
> (http://www.emn.fr/x-info/coccinelle/)
>
> // <smpl>
> @@
> expression *x;
> identifier f;
> constant char *C;
> @@
>
> x = \(kmalloc\|kcalloc\|kzalloc\)(...);
> ... when != x == NULL
>     when != x != NULL
>     when != (x || ...)
> (
> kfree(x)
>
> f(...,C,...,x,...)
>
> *f(...,x,...)
>
> *x->f
> )
> // </smpl>
>
> Signed-off-by: Julia Lawall <julia@diku.dk>

Much better, thank you.

Acked-by: Paul Moore <paul.moore@hp.com>

> ---
>  net/netlabel/netlabel_kapi.c        |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/net/netlabel/netlabel_kapi.c b/net/netlabel/netlabel_kapi.c
> index 3ff6f32..6ce0020 100644
> --- a/net/netlabel/netlabel_kapi.c
> +++ b/net/netlabel/netlabel_kapi.c
> @@ -151,7 +151,7 @@ int netlbl_cfg_unlbl_map_add(const char *domain,
>  			addr6 = addr;
>  			mask6 = mask;
>  			map6 = kzalloc(sizeof(*map6), GFP_ATOMIC);
> -			if (map4 == NULL)
> +			if (map6 == NULL)
>  				goto cfg_unlbl_map_add_failure;
>  			map6->type = NETLBL_NLTYPE_UNLABELED;
>  			ipv6_addr_copy(&map6->list.addr, addr6);
David Miller July 30, 2009, 5:59 p.m. UTC | #2
From: Paul Moore <paul.moore@hp.com>
Date: Thu, 30 Jul 2009 10:53:37 -0400

> On Thursday 30 July 2009 10:38:19 am Julia Lawall wrote:
>> From: Julia Lawall <julia@diku.dk>
>>
>> The test on map4 should be a test on map6.
>>
>> The semantic match that finds this problem is as follows:
>> (http://www.emn.fr/x-info/coccinelle/)
 ...
>> Signed-off-by: Julia Lawall <julia@diku.dk>
> 
> Much better, thank you.
> 
> Acked-by: Paul Moore <paul.moore@hp.com>

Applied, thanks.

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diff mbox

Patch

diff --git a/net/netlabel/netlabel_kapi.c b/net/netlabel/netlabel_kapi.c
index 3ff6f32..6ce0020 100644
--- a/net/netlabel/netlabel_kapi.c
+++ b/net/netlabel/netlabel_kapi.c
@@ -151,7 +151,7 @@  int netlbl_cfg_unlbl_map_add(const char *domain,
 			addr6 = addr;
 			mask6 = mask;
 			map6 = kzalloc(sizeof(*map6), GFP_ATOMIC);
-			if (map4 == NULL)
+			if (map6 == NULL)
 				goto cfg_unlbl_map_add_failure;
 			map6->type = NETLBL_NLTYPE_UNLABELED;
 			ipv6_addr_copy(&map6->list.addr, addr6);