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From: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
To: ffmpeg-devel@ffmpeg.org
Cc: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Subject: [FFmpeg-devel] [PATCH 3/7] avcodec/pgxdec: Remove pointless checks
Date: Sun, 24 Apr 2022 06:42:54 +0200
Message-ID: <AS8PR01MB79441EAB2E52898C305280F58FF99@AS8PR01MB7944.eurprd01.prod.exchangelabs.com> (raw)
In-Reply-To: <AS8PR01MB79440FF78671075B4A5A8C988FF99@AS8PR01MB7944.eurprd01.prod.exchangelabs.com>

These checks were (most likely) added to check for overreads
as the bytestream2_get_* functions return 0 in this case.
Yet this is not necessary anymore as we now have an explicit check
for the size. Should the input contain a real \0, pgx_get_number()
will error out lateron.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
---
 libavcodec/pgxdec.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/libavcodec/pgxdec.c b/libavcodec/pgxdec.c
index 9c474036da..c9ada5afb5 100644
--- a/libavcodec/pgxdec.c
+++ b/libavcodec/pgxdec.c
@@ -69,14 +69,11 @@ static int pgx_decode_header(AVCodecContext *avctx, GetByteContext *g,
     } else if (byte == '-') {
         *sign = 1;
         bytestream2_skipu(g, 1);
-    } else if (byte == 0)
-        goto error;
+    }
 
     byte = bytestream2_peek_byteu(g);
     if (byte == ' ')
         bytestream2_skipu(g, 1);
-    else if (byte == 0)
-        goto error;
 
     if (pgx_get_number(avctx, g, depth))
         goto error;
-- 
2.32.0

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  parent reply	other threads:[~2022-04-24  4:43 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-24  4:39 [FFmpeg-devel] [PATCH 1/7] avcodec/pgxdec: Make better use of size check Andreas Rheinhardt
2022-04-24  4:42 ` [FFmpeg-devel] [PATCH 2/7] avcodec/pgxdec: Avoid always-false checks Andreas Rheinhardt
2022-04-24 11:18   ` Paul B Mahol
2022-04-24  4:42 ` Andreas Rheinhardt [this message]
2022-04-24 11:17   ` [FFmpeg-devel] [PATCH 3/7] avcodec/pgxdec: Remove pointless checks Paul B Mahol
2022-04-24  4:42 ` [FFmpeg-devel] [PATCH 4/7] avcodec/pgxdec: Fix issue with negative linesizes Andreas Rheinhardt
2022-04-24 11:15   ` Paul B Mahol
2022-04-24  4:42 ` [FFmpeg-devel] [PATCH 5/7] avcodec/pgxdec: Hoist branch out of loop Andreas Rheinhardt
2022-04-24 11:16   ` Paul B Mahol
2022-04-24  4:42 ` [FFmpeg-devel] [PATCH 6/7] avcodec/pgxdec: Use unsigned types for unsigned values Andreas Rheinhardt
2022-04-24 11:16   ` Paul B Mahol
2022-04-24  4:42 ` [FFmpeg-devel] [PATCH 7/7] avcodec/xfacedec: Add AV_CODEC_CAP_DR1 Andreas Rheinhardt
2022-04-24 11:12   ` Paul B Mahol
2022-04-24 11:18 ` [FFmpeg-devel] [PATCH 1/7] avcodec/pgxdec: Make better use of size check Paul B Mahol

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