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Wed, 22 Feb 2023 06:58:34 +0000 Message-ID: <87356yqj8m.wl-kuninori.morimoto.gx@renesas.com> From: Kuninori Morimoto To: Mark Brown In-Reply-To: <875ybuqjcg.wl-kuninori.morimoto.gx@renesas.com> References: <875ybuqjcg.wl-kuninori.morimoto.gx@renesas.com> Subject: [PATCH 2/2] ASoC: patch_ca0132.c: fixup buffer overrun at tuning_ctl_set() User-Agent: Wanderlust/2.15.9 Emacs/26.3 Mule/6.0 Date: Wed, 22 Feb 2023 06:58:33 +0000 X-ClientProxiedBy: TY2PR02CA0021.apcprd02.prod.outlook.com (2603:1096:404:56::33) To OS3PR01MB8426.jpnprd01.prod.outlook.com (2603:1096:604:194::10) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: OS3PR01MB8426:EE_|TYWPR01MB8790:EE_ X-MS-Office365-Filtering-Correlation-Id: d8690cf9-6a9a-4be8-1cf9-08db14a236e5 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255; 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no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-alsa-devel.alsa-project.org-0; header-match-alsa-devel.alsa-project.org-1; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: Linux-ALSA , Takashi Iwai , Xian Wang , ye xingchen X-Mailman-Version: 3.3.8 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: tuning_ctl_set() might have buffer overrun at (X) if it didn't break from loop by matching (A). static int tuning_ctl_set(...) { for (i = 0; i < TUNING_CTLS_COUNT; i++) (A) if (nid == ca0132_tuning_ctls[i].nid) break; snd_hda_power_up(...); (X) dspio_set_param(..., ca0132_tuning_ctls[i].mid, ...); snd_hda_power_down(...); ^ return 1; } We will get below error by cppcheck sound/pci/hda/patch_ca0132.c:4229:2: note: After for loop, i has value 12 for (i = 0; i < TUNING_CTLS_COUNT; i++) ^ sound/pci/hda/patch_ca0132.c:4234:43: note: Array index out of bounds dspio_set_param(codec, ca0132_tuning_ctls[i].mid, 0x20, ^ This patch cares non match case. Signed-off-by: Kuninori Morimoto --- sound/pci/hda/patch_ca0132.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/sound/pci/hda/patch_ca0132.c b/sound/pci/hda/patch_ca0132.c index 0a292bf271f2..5ce4b5f62983 100644 --- a/sound/pci/hda/patch_ca0132.c +++ b/sound/pci/hda/patch_ca0132.c @@ -4228,8 +4228,10 @@ static int tuning_ctl_set(struct hda_codec *codec, hda_nid_t nid, for (i = 0; i < TUNING_CTLS_COUNT; i++) if (nid == ca0132_tuning_ctls[i].nid) - break; + goto found; + return -EINVAL; +found: snd_hda_power_up(codec); dspio_set_param(codec, ca0132_tuning_ctls[i].mid, 0x20, ca0132_tuning_ctls[i].req,