From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793829483; b=0MYpf5eHBH+KsJ5OwqG0vl78BM+RN9n3roZ5hLXa9ECl7JBVHAEZGYW2NpdMVjZUSYMh 33FJIQAOMZ2gtjSIiVMsvY2cYXcr2ev28Hk+H/OJJS9PVSmN+6KBoJD8+LKJCuiJfwyM7 h6gGd6n1dNHBmsWp9DJ2uofGg6GjaOvtitcrcu7HQqxuJHSyhnkPbVba13cx4MaevCtRI alZHJjUEI51J1kTpejblK4w9ptphud5P80fq62ne60hM34ALFTWaettM9SbsbiOR1fupg 0oxXBcIfJNUfjzomuCRE/KKlSWlE1z5TZkX8NHsM9fS/g38o+8ENwMbVsYQoDfif0yg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793829483; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=W2UOj8TBj/ZVtsNDuYF9P+jyg/KYQgkJzuSw+fmBTfg=; b=AHCwDaq5Q4GaOCv1yOhQihtsC9Xeu5ivlY3c4L2jLoBMQPeM7TWTWgPYG+I9H9ral9ra 6FEfhWye2RO7zAGcKyb19DFE1UBDIDacRcHPuTqPHcZIcQldNIkAPU/uOQgdb1LHagKee BrdtLR3w+b8ASWMdGSdKGQsI3/Ilzzb6uqj0XpKIj/whenk0W+dFlCi/vKu6EslFS3iq/ 6kuGFF8fvbHC1xCAcCfwZdtyIuV1DjZPrx8jq/NBIJ/uo3xD8GnqnIQ7thXOCcF1tEAhE e7LX0VGt07Gtw/jg/jKkhgt0y+G0xJ2F0fxn6mU5Oxkioip6mUUJngG0rwEDdFuF+8A== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b="g1/GT35c"; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C72EE6082BE9; Wed, 4 Nov 2026 21:58:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=g1/GT35c Received: by smtp.kernel.org (Postfix) with ESMTPSA id 278831F000C1; Wed, 4 Nov 2026 21:58:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1793829482; bh=W2UOj8TBj/ZVtsNDuYF9P+jyg/KYQgkJzuSw+fmBTfg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=g1/GT35cNIWuymPF0/XwCMWbGT8QeRdp1HYlVgDFBnvDLHlgJuKK4A4hWHyeYRyXY 8sVTLA3jqfrQLCPW0SPmcQGfFA+AHLfs95fJ/aTrxfFYw6EGL0OUN3wbhwjeE8ZI5/ qvhRYaBFq0aAThPeo/HaFYto8pbTSFDugqDKcfp0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Pengpeng Hou , Hans Verkuil , Sasha Levin Subject: [PATCH 6.18 0153/1005] media: cx18: stop VBI start-code scan before short tail Date: Wed, 4 Nov 2026 15:58:06 -0500 Message-ID: <20261104211048.038062878@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261104211043.516122098@linuxfoundation.org> References: <20261104211043.516122098@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: patches@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Pengpeng Hou [ Upstream commit bf533acaaa7dee21d49bcaabf8e813ea36bddcd8 ] compress_sliced_buf() scans one byte at a time while testing a four-byte VBI start code. The final iterations can read beyond the remaining buffer tail. Stop the scan once fewer than four bytes remain. Signed-off-by: Pengpeng Hou Signed-off-by: Hans Verkuil Signed-off-by: Sasha Levin --- drivers/media/pci/cx18/cx18-vbi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/pci/cx18/cx18-vbi.c b/drivers/media/pci/cx18/cx18-vbi.c index 8dc4ce3259353..3a8430f3259eb 100644 --- a/drivers/media/pci/cx18/cx18-vbi.c +++ b/drivers/media/pci/cx18/cx18-vbi.c @@ -135,7 +135,7 @@ static u32 compress_sliced_buf(struct cx18 *cx, u8 *buf, u32 size, : VBI_HBLANK_SAMPLES_50HZ; /* find the first valid line */ - for (i = hdr_size, buf += hdr_size; i < size; i++, buf++) { + for (i = hdr_size, buf += hdr_size; i + 3 < size; i++, buf++) { if (buf[0] == 0xff && !buf[1] && !buf[2] && (buf[3] == sliced_vbi_eav_rp[0] || buf[3] == sliced_vbi_eav_rp[1])) -- 2.53.0