From patchwork Wed Sep 11 14:24:25 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arseniy Krasnov X-Patchwork-Id: 13800782 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id EE514EE49BC for ; Wed, 11 Sep 2024 15:03:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject:CC:To:From: Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender :Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=0dnO4ujw+BJRKMFo8HSTMVWw4DKX/FH3odzibY6SRUU=; b=MP4mXzXE2fYFo+eu9BtKgvd6dl CtgIbc9A7cWNKQNs4EpZl5QM19w3KpIo/JHiJjDdvxh692VGOV1JL6DIPmbG3fwsA4duLwB746KZm olp4rfA/lzOMTWXS6tTkbzWroHDwdHjhA3/HJJuqhzfg0HsFM0Qru4XxWbz24Wd0lQdophC3rWNoW by1nQOK3aM4tAr1XVoypk5btIcj8iWH+eJO89o3LzBtYYsF0/w03qpepW0eYGmqtzn/e/z1ITBhdC M1zPQe4juxJyy1ugMoqjNUS095R+aBKrRnW+ccZAzLuzcK1eKa2/hMnS9tuaHFa2BUICX11X0vAe0 bd7WeB4Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1soOsZ-0000000A491-3JDG; Wed, 11 Sep 2024 15:03:35 +0000 Received: from mx1.sberdevices.ru ([37.18.73.165]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1soOTg-00000009xQp-2UxG; Wed, 11 Sep 2024 14:37:55 +0000 Received: from p-infra-ksmg-sc-msk01.sberdevices.ru (localhost [127.0.0.1]) by mx1.sberdevices.ru (Postfix) with ESMTP id 413E210000A; Wed, 11 Sep 2024 17:37:45 +0300 (MSK) DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.sberdevices.ru 413E210000A DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=salutedevices.com; s=mail; t=1726065465; bh=0dnO4ujw+BJRKMFo8HSTMVWw4DKX/FH3odzibY6SRUU=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type:From; b=UOOIYef9Ea7pItfRX8SY/YX5hW0eCKocGsAguBcE7UTwsGMvb+SoGYpjqDHF0Dr6N 5N7Nqp+L6i+9mQLE/uX/IdK3KxT5EKOKnO38X/wcmD2jgseFDiAFXBElasgNay6tPJ wSVC4+nZPAfHIXHB+m1Q3BmJsky6X7MsIRn0gU/YD26PtPZGkST8HraejoFmB7t13J HicSEiitim/pGuWwJYZzigS+bHN1rgE5w80V8h2n9wwCebtRtj7de0nKjxOVKZJqkC ERGITL2vfK8PIS2QzstmxquMzTS9zYcJz175h6Sddn4gOudrFVY0ymfHkdIJGfNFms Sai1VkOk3MwBA== Received: from smtp.sberdevices.ru (p-i-exch-sc-m02.sberdevices.ru [172.16.192.103]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.sberdevices.ru (Postfix) with ESMTPS; Wed, 11 Sep 2024 17:37:45 +0300 (MSK) From: Arseniy Krasnov To: Jerome Brunet , Liam Girdwood , Mark Brown , Jaroslav Kysela , "Takashi Iwai" , Neil Armstrong , "Kevin Hilman" , Martin Blumenstingl , , , , , CC: , , , Subject: [PATCH v1] ASoC: meson: axg-card: fix 'use-after-free' Date: Wed, 11 Sep 2024 17:24:25 +0300 Message-ID: <20240911142425.598631-1-avkrasnov@salutedevices.com> X-Mailer: git-send-email 2.35.0 MIME-Version: 1.0 X-Originating-IP: [172.28.161.232] X-ClientProxiedBy: p-i-exch-a-m1.sberdevices.ru (172.24.196.116) To p-i-exch-a-m1.sberdevices.ru (172.24.196.116) X-KSMG-Rule-ID: 10 X-KSMG-Message-Action: clean X-KSMG-AntiSpam-Lua-Profiles: 187687 [Sep 11 2024] X-KSMG-AntiSpam-Version: 6.1.1.5 X-KSMG-AntiSpam-Envelope-From: avkrasnov@salutedevices.com X-KSMG-AntiSpam-Rate: 0 X-KSMG-AntiSpam-Status: not_detected X-KSMG-AntiSpam-Method: none X-KSMG-AntiSpam-Auth: dkim=none X-KSMG-AntiSpam-Info: LuaCore: 32 0.3.32 766319f57b3d5e49f2c79a76e7d7087b621090df, {Tracking_from_domain_doesnt_match_to}, salutedevices.com:7.1.1;d41d8cd98f00b204e9800998ecf8427e.com:7.1.1;127.0.0.199:7.1.2;smtp.sberdevices.ru:5.0.1,7.1.1, FromAlignment: s X-MS-Exchange-Organization-SCL: -1 X-KSMG-AntiSpam-Interceptor-Info: scan successful X-KSMG-AntiPhishing: Clean X-KSMG-LinksScanning: Clean X-KSMG-AntiVirus: Kaspersky Secure Mail Gateway, version 2.0.1.6960, bases: 2024/09/11 13:00:00 #26553614 X-KSMG-AntiVirus-Status: Clean, skipped X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240911_073753_330772_FA0DD57F X-CRM114-Status: GOOD ( 12.55 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Buffer 'card->dai_link' is reallocated in 'meson_card_reallocate_links()', so move 'pad' pointer initialization after this function when memory is already reallocated. Kasan bug report: ================================================================== BUG: KASAN: slab-use-after-free in axg_card_add_link+0x76c/0x9bc Read of size 8 at addr ffff000000e8b260 by task modprobe/356 CPU: 0 PID: 356 Comm: modprobe Tainted: G O 6.9.12-sdkernel #1 Call trace: dump_backtrace+0x94/0xec show_stack+0x18/0x24 dump_stack_lvl+0x78/0x90 print_report+0xfc/0x5c0 kasan_report+0xb8/0xfc __asan_load8+0x9c/0xb8 axg_card_add_link+0x76c/0x9bc [snd_soc_meson_axg_sound_card] meson_card_probe+0x344/0x3b8 [snd_soc_meson_card_utils] platform_probe+0x8c/0xf4 really_probe+0x110/0x39c __driver_probe_device+0xb8/0x18c driver_probe_device+0x108/0x1d8 __driver_attach+0xd0/0x25c bus_for_each_dev+0xe0/0x154 driver_attach+0x34/0x44 bus_add_driver+0x134/0x294 driver_register+0xa8/0x1e8 __platform_driver_register+0x44/0x54 axg_card_pdrv_init+0x20/0x1000 [snd_soc_meson_axg_sound_card] do_one_initcall+0xdc/0x25c do_init_module+0x10c/0x334 load_module+0x24c4/0x26cc init_module_from_file+0xd4/0x128 __arm64_sys_finit_module+0x1f4/0x41c invoke_syscall+0x60/0x188 el0_svc_common.constprop.0+0x78/0x13c do_el0_svc+0x30/0x40 el0_svc+0x38/0x78 el0t_64_sync_handler+0x100/0x12c el0t_64_sync+0x190/0x194 Fixes: 7864a79f37b5 ("ASoC: meson: add axg sound card support") Cc: Signed-off-by: Arseniy Krasnov Reviewed-by: Jerome Brunet --- sound/soc/meson/axg-card.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/sound/soc/meson/axg-card.c b/sound/soc/meson/axg-card.c index 8c5605c1e34e8..eb0302f207407 100644 --- a/sound/soc/meson/axg-card.c +++ b/sound/soc/meson/axg-card.c @@ -104,7 +104,7 @@ static int axg_card_add_tdm_loopback(struct snd_soc_card *card, int *index) { struct meson_card *priv = snd_soc_card_get_drvdata(card); - struct snd_soc_dai_link *pad = &card->dai_link[*index]; + struct snd_soc_dai_link *pad; struct snd_soc_dai_link *lb; struct snd_soc_dai_link_component *dlc; int ret; @@ -114,6 +114,7 @@ static int axg_card_add_tdm_loopback(struct snd_soc_card *card, if (ret) return ret; + pad = &card->dai_link[*index]; lb = &card->dai_link[*index + 1]; lb->name = devm_kasprintf(card->dev, GFP_KERNEL, "%s-lb", pad->name);