From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ffbox0-bg.mplayerhq.hu (ffbox0-bg.ffmpeg.org [79.124.17.100]) by master.gitmailbox.com (Postfix) with ESMTP id 9C8E64B92E for ; Fri, 19 Jul 2024 16:04:33 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 1D00768D9AF; Fri, 19 Jul 2024 19:04:31 +0300 (EEST) Received: from mail-qv1-f49.google.com (mail-qv1-f49.google.com [209.85.219.49]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id C69E568D720 for ; Fri, 19 Jul 2024 19:04:23 +0300 (EEST) Received: by mail-qv1-f49.google.com with SMTP id 6a1803df08f44-6b79575f3daso2208366d6.3 for ; Fri, 19 Jul 2024 09:04:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1721405062; x=1722009862; darn=ffmpeg.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=Ymtvi7uQ8YmCHp87hoyKBlnbl8T44sV6UU+Cmjqvg1s=; b=nRAsLFKgNmgHFqKaqz2YY9Q1BgLBWJdzkKxt7wO9oqsg5ljr7GkiRl/gKZPayLdKpZ M4IRMAo/r9JI22gykB1JbDBO7bZw+xUYdn6TSNifxqgXqYnuwqeIWXAQ7CXHo2DZPJS8 8IGfWYZmGtXNQS7Qc5Y/oTIrvXzZCqTNnw0cuwajyqmVrfk+bnlXm326YTZJmWbD+3nq qLXizzRShw2O3Alt2OPeIF+4Rg9xMwjEVBPkVBqYJHQcLgeouje0T3W7sMzhpJxs3Jsc wHQnghr45+OeMfOP3/z7Uce1eXiQ2p+7CcQHwCIivCGz5N0FOw66/tSNXxLuzF6AR2O9 +QfA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1721405062; x=1722009862; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=Ymtvi7uQ8YmCHp87hoyKBlnbl8T44sV6UU+Cmjqvg1s=; b=XMSn0avvBCfj/kvDAm6h4D7ZMewYnx1vhsmZDl+hBOaFQimVxTDTp8uPGA8Uf8hr2x L1Tiw02S6l8aCwDmjArqtj6umGmT+wbJp9/vZvRaGEsE+WLCLj4paSZI/iOmPNUlSfHP mHIoHEizB3xHeUAy8qHOdrCPNypZJPeWwzwL6fbwelHjttOoDVcpyWZMTwip9cy4OgMA M1kCUOL7dPXLaOU4vupYgExALMIanS67GyDBip2kNDjre68aYD6xnA7nc7Wj42PlQWhM kA5MZdZJkOn+8OpnekUuE74Fa8u5lZVIGbv2Jl3PeFWjFp4hu0YxuBK4RCqkzyTL6aYD 5i0Q== X-Gm-Message-State: AOJu0Yz9gmak1T2aWvfV7sVBR9tJFvyzd2gRuTXHeonHkUvqu3vZqJyX V2YF5/R/4wY3E7wor/tOAqC69U0LFL4ykRIrv312ZqSnzB05W6R0Tj0uLw== X-Google-Smtp-Source: AGHT+IGo4bXsNk3eSZahbhMtgUszryfqba0tiysDi5CY78XpTIaW7/AYqjYurbmHRJ0/vBEnTqBlkQ== X-Received: by 2002:a05:620a:40c2:b0:79f:726:e2d6 with SMTP id af79cd13be357-7a1a13c849fmr15740285a.5.1721405062205; Fri, 19 Jul 2024 09:04:22 -0700 (PDT) Received: from gauss.local (c-68-56-149-176.hsd1.mi.comcast.net. [68.56.149.176]) by smtp.gmail.com with ESMTPSA id af79cd13be357-7a198fbe1basm100836985a.40.2024.07.19.09.04.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 19 Jul 2024 09:04:21 -0700 (PDT) From: Leo Izen To: ffmpeg-devel@ffmpeg.org Date: Fri, 19 Jul 2024 12:04:19 -0400 Message-ID: <20240719160420.169775-1-leo.izen@gmail.com> X-Mailer: git-send-email 2.45.2 MIME-Version: 1.0 Subject: [FFmpeg-devel] [PATCH 1/2] avcodec/pngdec: use 8-bit sBIT cap for indexed PNGs per spec X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Cc: Ramiro Polla , Leo Izen Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Archived-At: List-Archive: List-Post: The PNG specification[1] says that sBIT entries must be at most the bit depth specified in IHDR, unless the PNG is indexed-color, in which case sBIT must be between 1 and 8. We should not reject valid sBITs on PNGs with indexed color. [1]: https://www.w3.org/TR/png-3/#11sBIT Regression since 84b454935fae2633a8a5dd075e22393f3e8f932f. Signed-off-by: Leo Izen Reported-by: Ramiro Polla --- libavcodec/pngdec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c index cb861e5f60..c5b32c166d 100644 --- a/libavcodec/pngdec.c +++ b/libavcodec/pngdec.c @@ -1097,7 +1097,7 @@ static int decode_sbit_chunk(AVCodecContext *avctx, PNGDecContext *s, bits = FFMAX(b, bits); } - if (bits < 0 || bits > s->bit_depth) { + if (bits <= 0 || bits > (s->color_type & PNG_COLOR_MASK_PALETTE ? 8 : s->bit_depth)) { av_log(avctx, AV_LOG_ERROR, "Invalid significant bits: %d\n", bits); return AVERROR_INVALIDDATA; } -- 2.45.2 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".