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Sun, 18 Jan 2026 23:34:25 +0100 (CET) Message-ID: Subject: Re: [PATCH] media: verisilicon: AV1: Fix tile info buffer size From: Nicolas Dufresne To: Benjamin Gaignard , p.zabel@pengutronix.de, mchehab@kernel.org, heiko@sntech.de, hverkuil@kernel.org Cc: linux-media@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kernel@collabora.com Date: Sun, 18 Jan 2026 17:34:24 -0500 In-Reply-To: <20260114090710.71473-1-benjamin.gaignard@collabora.com> References: <20260114090710.71473-1-benjamin.gaignard@collabora.com> Autocrypt: addr=nicolas.dufresne@collabora.com; prefer-encrypt=mutual; keydata=mDMEaCN2ixYJKwYBBAHaRw8BAQdAM0EHepTful3JOIzcPv6ekHOenE1u0vDG1gdHFrChD /e0J05pY29sYXMgRHVmcmVzbmUgPG5pY29sYXNAbmR1ZnJlc25lLmNhPoicBBMWCgBEAhsDBQsJCA cCAiICBhUKCQgLAgQWAgMBAh4HAheABQkJZfd1FiEE7w1SgRXEw8IaBG8S2UGUUSlgcvQFAmibrjo CGQEACgkQ2UGUUSlgcvQlQwD/RjpU1SZYcKG6pnfnQ8ivgtTkGDRUJ8gP3fK7+XUjRNIA/iXfhXMN abIWxO2oCXKf3TdD7aQ4070KO6zSxIcxgNQFtDFOaWNvbGFzIER1ZnJlc25lIDxuaWNvbGFzLmR1Z nJlc25lQGNvbGxhYm9yYS5jb20+iJkEExYKAEECGwMFCwkIBwICIgIGFQoJCAsCBBYCAwECHgcCF4 AWIQTvDVKBFcTDwhoEbxLZQZRRKWBy9AUCaCyyxgUJCWX3dQAKCRDZQZRRKWBy9ARJAP96pFmLffZ smBUpkyVBfFAf+zq6BJt769R0al3kHvUKdgD9G7KAHuioxD2v6SX7idpIazjzx8b8rfzwTWyOQWHC AAS0LU5pY29sYXMgRHVmcmVzbmUgPG5pY29sYXMuZHVmcmVzbmVAZ21haWwuY29tPoiZBBMWCgBBF iEE7w1SgRXEw8IaBG8S2UGUUSlgcvQFAmibrGYCGwMFCQll93UFCwkIBwICIgIGFQoJCAsCBBYCAw ECHgcCF4AACgkQ2UGUUSlgcvRObgD/YnQjfi4+L8f4fI7p1pPMTwRTcaRdy6aqkKEmKsCArzQBAK8 bRLv9QjuqsE6oQZra/RB4widZPvphs78H0P6NmpIJ Organization: Collabora Canada Content-Type: multipart/signed; micalg="pgp-sha512"; protocol="application/pgp-signature"; boundary="=-jI/5S99Z0pZFxvjm1Yct" User-Agent: Evolution 3.58.2 (3.58.2-1.fc43) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260118_143430_144431_47F4B485 X-CRM114-Status: GOOD ( 12.69 ) 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 --=-jI/5S99Z0pZFxvjm1Yct Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Le mercredi 14 janvier 2026 =C3=A0 10:07 +0100, Benjamin Gaignard a =C3=A9c= rit=C2=A0: > Each tile info is composed of: row_sb, col_sb, start_pos > and end_pos (4 bytes each). So the total required memory > is AV1_MAX_TILES * 16 bytes. > Use the correct #define to allocate the buffer and avoid > writing tile info in non-allocated memory. >=20 > Signed-off-by: Benjamin Gaignard > Fixes: 727a400686a2c ("media: verisilicon: Add Rockchip AV1 decoder") > --- > =C2=A0.../media/platform/verisilicon/rockchip_vpu981_hw_av1_dec.c=C2=A0= =C2=A0 | 4 ++-- > =C2=A01 file changed, 2 insertions(+), 2 deletions(-) >=20 > diff --git a/drivers/media/platform/verisilicon/rockchip_vpu981_hw_av1_de= c.c b/drivers/media/platform/verisilicon/rockchip_vpu981_hw_av1_dec.c > index e4703bb6be7c..af854b149f35 100644 > --- a/drivers/media/platform/verisilicon/rockchip_vpu981_hw_av1_dec.c > +++ b/drivers/media/platform/verisilicon/rockchip_vpu981_hw_av1_dec.c > @@ -373,12 +373,12 @@ int rockchip_vpu981_av1_dec_init(struct hantro_ctx = *ctx) > =C2=A0 return -ENOMEM; > =C2=A0 av1_dec->global_model.size =3D GLOBAL_MODEL_SIZE; > =C2=A0 > - av1_dec->tile_info.cpu =3D dma_alloc_coherent(vpu->dev, AV1_MAX_TILES, > + av1_dec->tile_info.cpu =3D dma_alloc_coherent(vpu->dev, AV1_TILE_INFO_S= IZE, > =C2=A0 =C2=A0=C2=A0=C2=A0 &av1_dec->tile_info.dma, > =C2=A0 =C2=A0=C2=A0=C2=A0 GFP_KERNEL); > =C2=A0 if (!av1_dec->tile_info.cpu) > =C2=A0 return -ENOMEM; > - av1_dec->tile_info.size =3D AV1_MAX_TILES; > + av1_dec->tile_info.size =3D AV1_TILE_INFO_SIZE; After checking the sizes, I can only conclude the we rarely have more then = 8 tiles in our tests. Reviewed-by: Nicolas Dufresne > =C2=A0 > =C2=A0 av1_dec->film_grain.cpu =3D dma_alloc_coherent(vpu->dev, > =C2=A0 =C2=A0=C2=A0=C2=A0=C2=A0 ALIGN(sizeof(struct rockchip_av1_fil= m_grain), 2048), --=-jI/5S99Z0pZFxvjm1Yct Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQTvDVKBFcTDwhoEbxLZQZRRKWBy9AUCaW1f8QAKCRDZQZRRKWBy 9MMVAP9W46+A8zHAErcgPaB+4lWE35ITcz/n6XeOwtZ74V1TdQD/ScSGmvqGGrh0 gcsWab4t4CLQtCetxyPHwd0GpkD+FQ0= =oGdY -----END PGP SIGNATURE----- --=-jI/5S99Z0pZFxvjm1Yct--