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Tue, 18 Nov 2025 16:24:33 +0200 (EET) MIME-Version: 1.0 To: ffmpeg-devel@ffmpeg.org Date: Tue, 18 Nov 2025 14:24:33 -0000 Message-ID: <176347587369.25.14906576156218942072@2cb04c0e5124> Message-ID-Hash: ZF3A4JYEAGQK6HIQZM4PRS2TRHPWG2YQ X-Message-ID-Hash: ZF3A4JYEAGQK6HIQZM4PRS2TRHPWG2YQ X-MailFrom: code@ffmpeg.org X-Mailman-Rule-Hits: nonmember-moderation X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; loop; banned-address; header-match-ffmpeg-devel.ffmpeg.org-0; header-match-ffmpeg-devel.ffmpeg.org-1; header-match-ffmpeg-devel.ffmpeg.org-2; header-match-ffmpeg-devel.ffmpeg.org-3; emergency; member-moderation X-Mailman-Version: 3.3.10 Precedence: list Reply-To: FFmpeg development discussions and patches Subject: [FFmpeg-devel] [PATCH] swscale/swscale_unscaled: validate slice alignment before unscaled conversion (PR #20957) List-Id: FFmpeg development discussions and patches Archived-At: Archived-At: List-Archive: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: From: Ramiro Polla via ffmpeg-devel Cc: Ramiro Polla Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Archived-At: List-Archive: List-Post: PR #20957 opened by Ramiro Polla (ramiro) URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20957 Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20957.patch This prevents out of bounds access on unscaled converters that process multiple lines at a time. Fixes issue #11691. >>From 4c9ba5f6a6acb850e039ca4a4a6113e53850bd25 Mon Sep 17 00:00:00 2001 From: Ramiro Polla Date: Tue, 18 Nov 2025 15:10:16 +0100 Subject: [PATCH] swscale/swscale_unscaled: validate slice alignment before unscaled conversion This prevents out of bounds access on unscaled converters that process multiple lines at a time. Fixes issue #11691. --- libswscale/swscale.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/libswscale/swscale.c b/libswscale/swscale.c index f4c7eccac4..1d983f4420 100644 --- a/libswscale/swscale.c +++ b/libswscale/swscale.c @@ -1158,6 +1158,13 @@ static int scale_internal(SwsContext *sws, slice_h = dstSliceH; } + if (offset % c->dst_slice_align || slice_h % c->dst_slice_align) { + av_log(c, AV_LOG_ERROR, + "Incorrectly aligned output: %u/%u not multiples of %u\n", + offset, slice_h, c->dst_slice_align); + return AVERROR(EINVAL); + } + ret = c->convert_unscaled(c, src2, srcStride2, offset, slice_h, dst2, dstStride2); if (scale_dst) -- 2.49.1 _______________________________________________ ffmpeg-devel mailing list -- ffmpeg-devel@ffmpeg.org To unsubscribe send an email to ffmpeg-devel-leave@ffmpeg.org