linux-kernel - Re: [PATCH] tipc: fixed possible memory leak issue

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Date:   Sat, 4 Dec 2021 16:20:32 +0500
From:   Ameer Hamza <amhamza.mgc@...il.com>
To:     jmaloy@...hat.com, ying.xue@...driver.com, davem@...emloft.net,
        kuba@...nel.org
Cc:     tipc-discussion@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tipc: fixed possible memory leak issue

On Fri, Dec 03, 2021 at 10:48:48PM +0500, Ameer Hamza wrote:
> Fixed coverity warning by freeing the memory before return
> 
> Addresses-Coverity: 1494433 ("Resource leak")
> 
> Signed-off-by: Ameer Hamza <amhamza.mgc@...il.com>
> ---
>  net/tipc/crypto.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/net/tipc/crypto.c b/net/tipc/crypto.c
> index b4d9419a015b..10e6d0e9ddbc 100644
> --- a/net/tipc/crypto.c
> +++ b/net/tipc/crypto.c
> @@ -599,6 +599,7 @@ static int tipc_aead_init(struct tipc_aead **aead, struct tipc_aead_key *ukey,
>  	tmp->key = kmemdup(ukey, tipc_aead_key_size(ukey), GFP_KERNEL);
>  	if (!tmp->key) {
>  		tipc_aead_free(&tmp->rcu);
> +		kfree_sensitive(tmp);
>  		return -ENOMEM;
>  	}
>  	memcpy(&tmp->salt, ukey->key + keylen, TIPC_AES_GCM_SALT_SIZE);
> -- 
> 2.25.1
> 
I reviewed this change again and coverity is generating a false
positive here. tipc_aead_free() is already releasing the allocated
memory for tmp. Please ignore this patch and sorry for the
inconvinience.