[FFmpeg-cvslog] avcodec/takdsp: Fix integer overflows
Michael Niedermayer
git at videolan.org
Sun Apr 14 23:57:46 EEST 2024
ffmpeg | branch: release/3.4 | Michael Niedermayer <michael at niedermayer.cc> | Thu May 25 23:40:16 2023 +0200| [4e6b5097f24e2233ea0b27bbbb4760baf7a3fab0] | committer: Michael Niedermayer
avcodec/takdsp: Fix integer overflows
Fixes: avcodec/takdsp.c:44:23: runtime error: signed integer overflow: -2097158 - 2147012608 cannot be represented in type 'int'
Fixes: 58417/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TAK_fuzzer-5268919664640000
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit ff8a496d41422b694f66684ada97dcf49e167782)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=4e6b5097f24e2233ea0b27bbbb4760baf7a3fab0
---
libavcodec/takdsp.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/libavcodec/takdsp.c b/libavcodec/takdsp.c
index a8f9dba342..f5dc47988f 100644
--- a/libavcodec/takdsp.c
+++ b/libavcodec/takdsp.c
@@ -28,8 +28,8 @@ static void decorrelate_ls(int32_t *p1, int32_t *p2, int length)
int i;
for (i = 0; i < length; i++) {
- int32_t a = p1[i];
- int32_t b = p2[i];
+ uint32_t a = p1[i];
+ uint32_t b = p2[i];
p2[i] = a + b;
}
}
@@ -39,8 +39,8 @@ static void decorrelate_sr(int32_t *p1, int32_t *p2, int length)
int i;
for (i = 0; i < length; i++) {
- int32_t a = p1[i];
- int32_t b = p2[i];
+ uint32_t a = p1[i];
+ uint32_t b = p2[i];
p1[i] = b - a;
}
}
@@ -50,7 +50,7 @@ static void decorrelate_sm(int32_t *p1, int32_t *p2, int length)
int i;
for (i = 0; i < length; i++) {
- int32_t a = p1[i];
+ uint32_t a = p1[i];
int32_t b = p2[i];
a -= b >> 1;
p1[i] = a;
@@ -63,7 +63,7 @@ static void decorrelate_sf(int32_t *p1, int32_t *p2, int length, int dshift, int
int i;
for (i = 0; i < length; i++) {
- int32_t a = p1[i];
+ uint32_t a = p1[i];
int32_t b = p2[i];
b = (unsigned)((int)(dfactor * (unsigned)(b >> dshift) + 128) >> 8) << dshift;
p1[i] = b - a;
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