* [FFmpeg-devel] [PATCH] swscale/x86/ops: fix signed integer related UB in normalize_clear() (PR #20984)
@ 2025-11-20 21:16 James Almer via ffmpeg-devel
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From: James Almer via ffmpeg-devel @ 2025-11-20 21:16 UTC (permalink / raw)
To: ffmpeg-devel; +Cc: James Almer
PR #20984 opened by James Almer (jamrial)
URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20984
Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20984.patch
>From 1c311c52834b125a9af4637b04df33194565450c Mon Sep 17 00:00:00 2001
From: James Almer <jamrial@gmail.com>
Date: Thu, 20 Nov 2025 18:15:23 -0300
Subject: [PATCH] swscale/x86/ops: fix signed integer related UB in
normalize_clear()
Signed-off-by: James Almer <jamrial@gmail.com>
---
libswscale/x86/ops.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/libswscale/x86/ops.c b/libswscale/x86/ops.c
index 26f49582ae..97bee93f5b 100644
--- a/libswscale/x86/ops.c
+++ b/libswscale/x86/ops.c
@@ -616,8 +616,8 @@ static void normalize_clear(SwsOp *op)
if (!op->c.q4[i].den)
continue;
switch (ff_sws_pixel_type_size(op->type)) {
- case 1: c.u32 = 0x1010101 * priv.u8[i]; break;
- case 2: c.u32 = priv.u16[i] << 16 | priv.u16[i]; break;
+ case 1: c.u32 = 0x1010101U * priv.u8[i]; break;
+ case 2: c.u32 = (uint32_t)priv.u16[i] << 16 | priv.u16[i]; break;
case 4: c.u32 = priv.u32[i]; break;
}
--
2.49.1
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2025-11-20 21:16 [FFmpeg-devel] [PATCH] swscale/x86/ops: fix signed integer related UB in normalize_clear() (PR #20984) James Almer via ffmpeg-devel
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