[FFmpeg-cvslog] avformat/aviobuf: Don't check for overflow after it happened
Andreas Rheinhardt
git at videolan.org
Wed Jul 1 23:07:21 EEST 2020
ffmpeg | branch: release/4.2 | Andreas Rheinhardt <andreas.rheinhardt at gmail.com> | Sun May 24 03:14:00 2020 +0200| [2b2358f595523ab916d1e437d52e01f463afcc00] | committer: Andreas Rheinhardt
avformat/aviobuf: Don't check for overflow after it happened
If adding two ints overflows, it doesn't matter whether the result will
be stored in an unsigned or not; and checking afterwards does not make it
retroactively defined.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>
(cherry picked from commit 28a078eded1c29985ed078b59d48ff59cf00394b)
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=2b2358f595523ab916d1e437d52e01f463afcc00
---
libavformat/aviobuf.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavformat/aviobuf.c b/libavformat/aviobuf.c
index de9f210d2d..6836e0c79e 100644
--- a/libavformat/aviobuf.c
+++ b/libavformat/aviobuf.c
@@ -1305,7 +1305,7 @@ static int dyn_buf_write(void *opaque, uint8_t *buf, int buf_size)
unsigned new_size, new_allocated_size;
/* reallocate buffer if needed */
- new_size = d->pos + buf_size;
+ new_size = (unsigned)d->pos + buf_size;
new_allocated_size = d->allocated_size;
if (new_size < d->pos || new_size > INT_MAX/2)
return -1;
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