netdev - Re: [PATCH 6/6] net/tls: implement ->read

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Date: Fri, 21 Jul 2023 08:03:27 +0200
From: Hannes Reinecke <hare@...e.de>
To: Simon Horman <simon.horman@...igine.com>
Cc: Christoph Hellwig <hch@....de>, Sagi Grimberg <sagi@...mberg.me>,
 Keith Busch <kbusch@...nel.org>, linux-nvme@...ts.infradead.org,
 Jakub Kicinski <kuba@...nel.org>, Eric Dumazet <edumazet@...gle.com>,
 Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
 Boris Pismenny <boris.pismenny@...il.com>
Subject: Re: [PATCH 6/6] net/tls: implement ->read_sock()

On 7/20/23 20:32, Simon Horman wrote:
> On Wed, Jul 19, 2023 at 01:38:36PM +0200, Hannes Reinecke wrote:
> 
> ...
> 
> Hi Hannes,
> 
>> diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
>> index d0636ea13009..4829d2cb9a7c 100644
>> --- a/net/tls/tls_sw.c
>> +++ b/net/tls/tls_sw.c
>> @@ -2202,6 +2202,102 @@ ssize_t tls_sw_splice_read(struct socket *sock,  loff_t *ppos,
>>   	goto splice_read_end;
>>   }
>>   
>> +int tls_sw_read_sock(struct sock *sk, read_descriptor_t *desc,
>> +		     sk_read_actor_t read_actor)
>> +{
>> +	struct tls_context *tls_ctx = tls_get_ctx(sk);
>> +	struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx);
>> +	struct strp_msg *rxm = NULL;
>> +	struct tls_msg *tlm;
>> +	struct sk_buff *skb;
>> +	struct sk_psock *psock;
>> +	ssize_t copied = 0;
>> +	bool bpf_strp_enabled;
>> +	int err, used;
>> +
>> +	psock = sk_psock_get(sk);
>> +	err = tls_rx_reader_acquire(sk, ctx, true);
>> +	if (err < 0)
>> +		goto psock_put;
> 
> skb is uninitialised here,
> however, it is used in the psock_put unwind path.
> 
> Flagged by gcc-12 [-Wmaybe-uninitialized] and Smatch.
> 
Will fix it up in the next round.

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                Kernel Storage Architect
hare@...e.de                              +49 911 74053 688
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