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[34.86.173.188]) by smtp.gmail.com with ESMTPSA id 6-20020a0562140d4600b0068f75622543sm1998523qvr.1.2024.03.23.03.41.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 23 Mar 2024 03:41:51 -0700 (PDT) From: Ricardo Ribalda Date: Sat, 23 Mar 2024 10:41:47 +0000 Subject: [PATCH 3/3] media: dvbdev: Initialize sbuf Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20240323-gcc-arm-warnings-v1-3-0b45cc52f39e@chromium.org> References: <20240323-gcc-arm-warnings-v1-0-0b45cc52f39e@chromium.org> In-Reply-To: <20240323-gcc-arm-warnings-v1-0-0b45cc52f39e@chromium.org> To: Thierry Reding , Jonathan Hunter , Sowjanya Komatineni , Luca Ceresoli , Mauro Carvalho Chehab , Greg Kroah-Hartman , Hans Verkuil Cc: linux-media@vger.kernel.org, linux-tegra@vger.kernel.org, linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org, Ricardo Ribalda X-Mailer: b4 0.12.4 Because the size passed to copy_from_user() cannot be known beforehand, it needs to be checked during runtime with check_object_size. That makes gcc believe that the content of sbuf can be used before init. Fix: ./include/linux/thread_info.h:215:17: warning: =E2=80=98sbuf=E2=80=99 may b= e used uninitialized [-Wmaybe-uninitialized] Signed-off-by: Ricardo Ribalda --- drivers/media/dvb-core/dvbdev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/dvb-core/dvbdev.c b/drivers/media/dvb-core/dvbde= v.c index 733d0bc4b4cc3..b43695bc51e75 100644 --- a/drivers/media/dvb-core/dvbdev.c +++ b/drivers/media/dvb-core/dvbdev.c @@ -956,7 +956,7 @@ int dvb_usercopy(struct file *file, int (*func)(struct file *file, unsigned int cmd, void *arg)) { - char sbuf[128]; + char sbuf[128] =3D {}; void *mbuf =3D NULL; void *parg =3D NULL; int err =3D -EINVAL; --=20 2.44.0.396.g6e790dbe36-goog