linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Taras Chornyi <tchornyi@marvell.com>
To: Jiasheng Jiang <jiasheng@iscas.ac.cn>,
	vmytnyk@marvell.com, davem@davemloft.net, edumazet@google.com,
	kuba@kernel.org, pabeni@redhat.com
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] net: prestera: acl: Add check for kmemdup
Date: Fri, 30 Sep 2022 12:20:01 +0300	[thread overview]
Message-ID: <ac5b9485-c9cb-9458-1101-6a219ee1faa5@marvell.com> (raw)
In-Reply-To: <20220930044843.32647-1-jiasheng@iscas.ac.cn>


> ----------------------------------------------------------------------
> As the kemdup could return NULL, it should be better to check the return
> value and return error if fails.
> Moreover, the return value of prestera_acl_ruleset_keymask_set() should
> be checked by cascade.
>
> Fixes: 604ba230902d ("net: prestera: flower template support")
> Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
> ---
>   drivers/net/ethernet/marvell/prestera/prestera_acl.c    | 8 ++++++--
>   drivers/net/ethernet/marvell/prestera/prestera_acl.h    | 4 ++--
>   drivers/net/ethernet/marvell/prestera/prestera_flower.c | 6 +++++-
>   3 files changed, 13 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/net/ethernet/marvell/prestera/prestera_acl.c b/drivers/net/ethernet/marvell/prestera/prestera_acl.c
> index 3d4b85f2d541..f6b2933859d0 100644
> --- a/drivers/net/ethernet/marvell/prestera/prestera_acl.c
> +++ b/drivers/net/ethernet/marvell/prestera/prestera_acl.c
> @@ -178,10 +178,14 @@ prestera_acl_ruleset_create(struct prestera_acl *acl,
>   	return ERR_PTR(err);
>   }
>   
> -void prestera_acl_ruleset_keymask_set(struct prestera_acl_ruleset *ruleset,
> -				      void *keymask)
> +int prestera_acl_ruleset_keymask_set(struct prestera_acl_ruleset *ruleset,
> +				     void *keymask)
>   {
>   	ruleset->keymask = kmemdup(keymask, ACL_KEYMASK_SIZE, GFP_KERNEL);
> +	if (!ruleset->keymask)
> +		return -ENOMEM;
> +
> +	return 0;
>   }
>   
>   int prestera_acl_ruleset_offload(struct prestera_acl_ruleset *ruleset)
> diff --git a/drivers/net/ethernet/marvell/prestera/prestera_acl.h b/drivers/net/ethernet/marvell/prestera/prestera_acl.h
> index 03fc5b9dc925..131bfbc87cd7 100644
> --- a/drivers/net/ethernet/marvell/prestera/prestera_acl.h
> +++ b/drivers/net/ethernet/marvell/prestera/prestera_acl.h
> @@ -185,8 +185,8 @@ struct prestera_acl_ruleset *
>   prestera_acl_ruleset_lookup(struct prestera_acl *acl,
>   			    struct prestera_flow_block *block,
>   			    u32 chain_index);
> -void prestera_acl_ruleset_keymask_set(struct prestera_acl_ruleset *ruleset,
> -				      void *keymask);
> +int prestera_acl_ruleset_keymask_set(struct prestera_acl_ruleset *ruleset,
> +				     void *keymask);
>   bool prestera_acl_ruleset_is_offload(struct prestera_acl_ruleset *ruleset);
>   int prestera_acl_ruleset_offload(struct prestera_acl_ruleset *ruleset);
>   void prestera_acl_ruleset_put(struct prestera_acl_ruleset *ruleset);
> diff --git a/drivers/net/ethernet/marvell/prestera/prestera_flower.c b/drivers/net/ethernet/marvell/prestera/prestera_flower.c
> index 19d3b55c578e..cf551a8379ac 100644
> --- a/drivers/net/ethernet/marvell/prestera/prestera_flower.c
> +++ b/drivers/net/ethernet/marvell/prestera/prestera_flower.c
> @@ -452,7 +452,9 @@ int prestera_flower_tmplt_create(struct prestera_flow_block *block,
>   	}
>   
>   	/* preserve keymask/template to this ruleset */
> -	prestera_acl_ruleset_keymask_set(ruleset, rule.re_key.match.mask);
> +	err = prestera_acl_ruleset_keymask_set(ruleset, rule.re_key.match.mask);
> +	if (err)
> +		goto err_ruleset_keymask_set;
>   
>   	/* skip error, as it is not possible to reject template operation,
>   	 * so, keep the reference to the ruleset for rules to be added
> @@ -468,6 +470,8 @@ int prestera_flower_tmplt_create(struct prestera_flow_block *block,
>   	list_add_rcu(&template->list, &block->template_list);
>   	return 0;
>   
> +err_ruleset_keymask_set:
> +	prestera_acl_ruleset_put(ruleset);
>   err_ruleset_get:
>   	kfree(template);
>   err_malloc:

Reviewed-by: Taras Chornyi<tchornyi@marvell.com>


  reply	other threads:[~2022-09-30  9:20 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-09-30  4:48 [PATCH] net: prestera: acl: Add check for kmemdup Jiasheng Jiang
2022-09-30  9:20 ` Taras Chornyi [this message]
2022-10-03 11:40 ` patchwork-bot+netdevbpf
  -- strict thread matches above, loose matches on Subject: below --
2022-09-30  5:03 Jiasheng Jiang
2022-09-30 14:29 ` Jakub Kicinski
2022-09-30 15:20   ` Joe Perches
2022-09-30 15:44     ` Jakub Kicinski
2022-09-30 16:43       ` Joe Perches
2022-09-30 16:58         ` Jakub Kicinski
2022-09-30 18:28           ` Joe Perches
2022-09-28  9:20 Jiasheng Jiang
2022-09-29 16:15 ` Jakub Kicinski

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=ac5b9485-c9cb-9458-1101-6a219ee1faa5@marvell.com \
    --to=tchornyi@marvell.com \
    --cc=davem@davemloft.net \
    --cc=edumazet@google.com \
    --cc=jiasheng@iscas.ac.cn \
    --cc=kuba@kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=netdev@vger.kernel.org \
    --cc=pabeni@redhat.com \
    --cc=vmytnyk@marvell.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).