netdev - Re: [PATCH v11 crypto 01/12] tls: support for Inline tls record (fwd)

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Date:   Sun, 18 Mar 2018 17:01:34 +0100 (CET)
From:   Julia Lawall <julia.lawall@...6.fr>
To:     Atul Gupta <atul.gupta@...lsio.com>
cc:     davejwatson@...com, davem@...emloft.net,
        herbert@...dor.apana.org.au, sd@...asysnail.net,
        sbrivio@...hat.com, linux-crypto@...r.kernel.org,
        netdev@...r.kernel.org, ganeshgr@...lsio.com, sd@...asysnail.net,
        sbrivio@...hat.com, linux-crypto@...r.kernel.org,
        netdev@...r.kernel.org, ganeshgr@...lsio.com, kbuild-all@...org
Subject: Re: [PATCH v11 crypto 01/12] tls: support for Inline tls record
 (fwd)


ctx is dereferenced on line 258 but has been freed on line 229.

julia

---------- Forwarded message ----------
Date: Sun, 18 Mar 2018 18:05:25 +0800
From: kbuild test robot <fengguang.wu@...el.com>
To: kbuild@...org
Cc: Julia Lawall <julia.lawall@...6.fr>
Subject: Re: [PATCH v11 crypto 01/12] tls: support for Inline tls record

CC: kbuild-all@...org
In-Reply-To: <1521214661-28928-1-git-send-email-atul.gupta@...lsio.com>
References: <1521214661-28928-1-git-send-email-atul.gupta@...lsio.com>
TO: Atul Gupta <atul.gupta@...lsio.com>
CC: davejwatson@...com, davem@...emloft.net, herbert@...dor.apana.org.au, sd@...asysnail.net, sbrivio@...hat.com, linux-crypto@...r.kernel.org, netdev@...r.kernel.org, ganeshgr@...lsio.com
CC: sd@...asysnail.net, sbrivio@...hat.com, linux-crypto@...r.kernel.org, netdev@...r.kernel.org, ganeshgr@...lsio.com

Hi Atul,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on v4.16-rc4]
[cannot apply to next-20180316]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Atul-Gupta/tls-support-for-Inline-tls-record/20180318-162840
:::::: branch date: 2 hours ago
:::::: commit date: 2 hours ago

>> net/tls/tls_main.c:258:5-8: ERROR: reference preceded by free on line 229

# https://github.com/0day-ci/linux/commit/be47378786b9d9874dfc3ab57504565275c7b3ff
git remote add linux-review https://github.com/0day-ci/linux
git remote update linux-review
git checkout be47378786b9d9874dfc3ab57504565275c7b3ff
vim +258 net/tls/tls_main.c

3c4d75591 Dave Watson   2017-06-14  218
3c4d75591 Dave Watson   2017-06-14  219  static void tls_sk_proto_close(struct sock *sk, long timeout)
3c4d75591 Dave Watson   2017-06-14  220  {
3c4d75591 Dave Watson   2017-06-14  221  	struct tls_context *ctx = tls_get_ctx(sk);
3c4d75591 Dave Watson   2017-06-14  222  	long timeo = sock_sndtimeo(sk, 0);
3c4d75591 Dave Watson   2017-06-14  223  	void (*sk_proto_close)(struct sock *sk, long timeout);
3c4d75591 Dave Watson   2017-06-14  224
3c4d75591 Dave Watson   2017-06-14  225  	lock_sock(sk);
ff45d820a Ilya Lesokhin 2017-11-13  226  	sk_proto_close = ctx->sk_proto_close;
ff45d820a Ilya Lesokhin 2017-11-13  227
ff45d820a Ilya Lesokhin 2017-11-13  228  	if (ctx->tx_conf == TLS_BASE_TX) {
ff45d820a Ilya Lesokhin 2017-11-13 @229  		kfree(ctx);
ff45d820a Ilya Lesokhin 2017-11-13  230  		goto skip_tx_cleanup;
ff45d820a Ilya Lesokhin 2017-11-13  231  	}
3c4d75591 Dave Watson   2017-06-14  232
3c4d75591 Dave Watson   2017-06-14  233  	if (!tls_complete_pending_work(sk, ctx, 0, &timeo))
3c4d75591 Dave Watson   2017-06-14  234  		tls_handle_open_record(sk, 0);
3c4d75591 Dave Watson   2017-06-14  235
3c4d75591 Dave Watson   2017-06-14  236  	if (ctx->partially_sent_record) {
3c4d75591 Dave Watson   2017-06-14  237  		struct scatterlist *sg = ctx->partially_sent_record;
3c4d75591 Dave Watson   2017-06-14  238
3c4d75591 Dave Watson   2017-06-14  239  		while (1) {
3c4d75591 Dave Watson   2017-06-14  240  			put_page(sg_page(sg));
3c4d75591 Dave Watson   2017-06-14  241  			sk_mem_uncharge(sk, sg->length);
3c4d75591 Dave Watson   2017-06-14  242
3c4d75591 Dave Watson   2017-06-14  243  			if (sg_is_last(sg))
3c4d75591 Dave Watson   2017-06-14  244  				break;
3c4d75591 Dave Watson   2017-06-14  245  			sg++;
3c4d75591 Dave Watson   2017-06-14  246  		}
3c4d75591 Dave Watson   2017-06-14  247  	}
ff45d820a Ilya Lesokhin 2017-11-13  248
3c4d75591 Dave Watson   2017-06-14  249  	kfree(ctx->rec_seq);
3c4d75591 Dave Watson   2017-06-14  250  	kfree(ctx->iv);
3c4d75591 Dave Watson   2017-06-14  251
ff45d820a Ilya Lesokhin 2017-11-13  252  	if (ctx->tx_conf == TLS_SW_TX)
ff45d820a Ilya Lesokhin 2017-11-13  253  		tls_sw_free_tx_resources(sk);
3c4d75591 Dave Watson   2017-06-14  254
ff45d820a Ilya Lesokhin 2017-11-13  255  skip_tx_cleanup:
3c4d75591 Dave Watson   2017-06-14  256  	release_sock(sk);
3c4d75591 Dave Watson   2017-06-14  257  	sk_proto_close(sk, timeout);
be4737878 Atul Gupta    2018-03-16 @258  	if (ctx->tx_conf == TLS_HW_RECORD)
be4737878 Atul Gupta    2018-03-16  259  		kfree(ctx);
3c4d75591 Dave Watson   2017-06-14  260  }
3c4d75591 Dave Watson   2017-06-14  261

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