* [PATCH][next] iwlwifi: lib: Use struct_size() helper
@ 2019-04-03 15:59 Gustavo A. R. Silva
2019-05-14 5:16 ` Luciano Coelho
0 siblings, 1 reply; 2+ messages in thread
From: Gustavo A. R. Silva @ 2019-04-03 15:59 UTC (permalink / raw)
To: Johannes Berg, Emmanuel Grumbach, Luca Coelho,
Intel Linux Wireless, Kalle Valo, David S. Miller
Cc: linux-wireless, netdev, linux-kernel, Gustavo A. R. Silva
Make use of the struct_size() helper instead of an open-coded version
in order to avoid any potential type mistakes, in particular in the
context in which this code is being used.
So, change the following form:
sizeof(*pattern_cmd) +
wowlan->n_patterns * sizeof(struct iwlagn_wowlan_pattern)
to :
struct_size(pattern_cmd, patterns, wowlan->n_patterns)
This code was detected with the help of Coccinelle.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
---
drivers/net/wireless/intel/iwlwifi/dvm/lib.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/dvm/lib.c b/drivers/net/wireless/intel/iwlwifi/dvm/lib.c
index b2f172d4f78a..cae9cd438697 100644
--- a/drivers/net/wireless/intel/iwlwifi/dvm/lib.c
+++ b/drivers/net/wireless/intel/iwlwifi/dvm/lib.c
@@ -1022,8 +1022,7 @@ int iwlagn_send_patterns(struct iwl_priv *priv,
if (!wowlan->n_patterns)
return 0;
- cmd.len[0] = sizeof(*pattern_cmd) +
- wowlan->n_patterns * sizeof(struct iwlagn_wowlan_pattern);
+ cmd.len[0] = struct_size(pattern_cmd, patterns, wowlan->n_patterns);
pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL);
if (!pattern_cmd)
--
2.21.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH][next] iwlwifi: lib: Use struct_size() helper
2019-04-03 15:59 [PATCH][next] iwlwifi: lib: Use struct_size() helper Gustavo A. R. Silva
@ 2019-05-14 5:16 ` Luciano Coelho
0 siblings, 0 replies; 2+ messages in thread
From: Luciano Coelho @ 2019-05-14 5:16 UTC (permalink / raw)
To: Gustavo A. R. Silva, Johannes Berg, Emmanuel Grumbach,
Intel Linux Wireless, Kalle Valo, David S. Miller
Cc: linux-wireless, netdev, linux-kernel
On Wed, 2019-04-03 at 10:59 -0500, Gustavo A. R. Silva wrote:
> Make use of the struct_size() helper instead of an open-coded version
> in order to avoid any potential type mistakes, in particular in the
> context in which this code is being used.
>
> So, change the following form:
>
> sizeof(*pattern_cmd) +
> wowlan->n_patterns * sizeof(struct
> iwlagn_wowlan_pattern)
>
> to :
>
> struct_size(pattern_cmd, patterns, wowlan->n_patterns)
>
> This code was detected with the help of Coccinelle.
>
> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
> ---
> drivers/net/wireless/intel/iwlwifi/dvm/lib.c | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/net/wireless/intel/iwlwifi/dvm/lib.c
> b/drivers/net/wireless/intel/iwlwifi/dvm/lib.c
> index b2f172d4f78a..cae9cd438697 100644
> --- a/drivers/net/wireless/intel/iwlwifi/dvm/lib.c
> +++ b/drivers/net/wireless/intel/iwlwifi/dvm/lib.c
> @@ -1022,8 +1022,7 @@ int iwlagn_send_patterns(struct iwl_priv *priv,
> if (!wowlan->n_patterns)
> return 0;
>
> - cmd.len[0] = sizeof(*pattern_cmd) +
> - wowlan->n_patterns * sizeof(struct
> iwlagn_wowlan_pattern);
> + cmd.len[0] = struct_size(pattern_cmd, patterns, wowlan-
> >n_patterns);
>
> pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL);
> if (!pattern_cmd)
Thanks! Applied to our internal tree and it will reach the mainline
following our normal upstreaming process.
--
Cheers,
Luca.
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