From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5C1C8142903; Mon, 16 Sep 2024 12:11:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726488718; cv=none; b=OJbfiilmVAPZ9cnh5tqksLiQDtwDoAKkakRchPklT+3Od5qX/L17GeV8GduSLBTUuzObDc6J2sYTGdP6avjUlDZD9jdqG1xlyZaurfBF3a19AIcze527C+yvqwsmjhPcR6idkxhMeKW2in69s99HH8oZNe8XOzJJ2TnF2CTIn08= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726488718; c=relaxed/simple; bh=IgpJcMezPW8beX0O95BXjROrjZZSLYLJcLqrIEYv1Gw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=AQ8Tt8sxo8wIIW959fl7HTRCFNm0Tl4kSMVAhDSTV2CWoLFOoMy6E/ABvb8KWXDOe0cyVvd6WHlFMW2yFy02RwSRMzKyFXJdyuuRkm1/X9hlAHl66cRdBChhNr5rgiNtx1giQPBNQacQgTNN7kUf9e4VQPxQ3aEBOo/rks17wxo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=FXxDhFw/; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="FXxDhFw/" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D5545C4CEC7; Mon, 16 Sep 2024 12:11:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1726488718; bh=IgpJcMezPW8beX0O95BXjROrjZZSLYLJcLqrIEYv1Gw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FXxDhFw/BFxlznhxT+A4DK73ofhxhkuqUbobZvydbe2GwvYdLwqwIgJv5kKzrZIx9 /8J+HVLOxTTzauqdS3o5tXTmxHetVAEeu+lajXBibMuxkrPfKQlN73nCL7ibSOgqLz VdmGj1YVFrU2BkNhkZjT0UfEd3bcgDBH3XcsyHik= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Stable@vger.kernel.org, Arseniy Krasnov , Jerome Brunet , Mark Brown Subject: [PATCH 6.6 90/91] ASoC: meson: axg-card: fix use-after-free Date: Mon, 16 Sep 2024 13:45:06 +0200 Message-ID: <20240916114227.417431995@linuxfoundation.org> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240916114224.509743970@linuxfoundation.org> References: <20240916114224.509743970@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Arseniy Krasnov commit 4f9a71435953f941969a4f017e2357db62d85a86 upstream. 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: Stable@vger.kernel.org Signed-off-by: Arseniy Krasnov Reviewed-by: Jerome Brunet Link: https://patch.msgid.link/20240911142425.598631-1-avkrasnov@salutedevices.com Signed-off-by: Mark Brown Signed-off-by: Greg Kroah-Hartman --- sound/soc/meson/axg-card.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- 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(str 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(str 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);