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Sat, 15 Jun 2024 23:39:33 -0400 (EDT) Date: Sun, 16 Jun 2024 12:39:31 +0900 From: Takashi Sakamoto To: Takashi Iwai Cc: linux-sound@vger.kernel.org, Paul Menzel , Mark Brown , Jaroslav Kysela , linux-kselftest@vger.kernel.org Subject: Re: [PATCH v2 3/6] ALSA: control: Apply sanity check of input values for user elements Message-ID: <20240616033931.GA518788@workstation.local> References: <20240614153717.30143-1-tiwai@suse.de> <20240614153717.30143-4-tiwai@suse.de> <20240615051329.GA494527@workstation.local> <871q4y7jgt.wl-tiwai@suse.de> <20240615080235.GA508000@workstation.local> <87tthu6225.wl-tiwai@suse.de> <87le365tei.wl-tiwai@suse.de> Precedence: bulk X-Mailing-List: linux-sound@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87le365tei.wl-tiwai@suse.de> On Sat, Jun 15, 2024 at 01:37:09PM +0200, Takashi Iwai wrote: > From: Takashi Iwai > Subject: [PATCH v3] ALSA: control: Apply sanity check of input values for user elements > > Although we have already a mechanism for sanity checks of input values > for control writes, it's not applied unless the kconfig > CONFIG_SND_CTL_INPUT_VALIDATION is set due to the performance reason. > Nevertheless, it still makes sense to apply the same check for user > elements despite of its cost, as that's the only way to filter out the > invalid values; the user controls are handled solely in ALSA core > code, and there is no corresponding driver, after all. > > This patch adds the same input value validation for user control > elements at its put callback. The kselftest will be happier with this > change, as the incorrect values will be bailed out now with errors. > > For other normal controls, the check is applied still only when > CONFIG_SND_CTL_INPUT_VALIDATION is set. > > Reported-by: Paul Menzel > Closes: https://lore.kernel.org/r/1d44be36-9bb9-4d82-8953-5ae2a4f09405@molgen.mpg.de > Reviewed-by: Jaroslav Kysela > Reviewed-by: Mark Brown > Signed-off-by: Takashi Iwai > --- > sound/core/control.c | 6 +++++- > 1 file changed, 5 insertions(+), 1 deletion(-) Reviewed-by: Takashi Sakamoto Thanks Takashi Sakamoto