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avcodec/ttadsp: Fix several integer overflows in tta_filter_process_c()

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Fixes: signed integer overflow: 1931744255 + 252497024 cannot be represented in type 'int'
Fixes: 20492/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TTA_fuzzer-5763348114440192

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 8627885172)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2020-05-10 21:12:22 +02:00
parent c04b6048f5
commit d01f5a4dc6
1 changed files with 3 additions and 1 deletions
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4
libavcodec/ttadsp.c
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@ -20,9 +20,11 @@
#include "ttadsp.h" #include "ttadsp.h"
#include "config.h" #include "config.h"
static void tta_filter_process_c(int32_t *qm, int32_t *dx, int32_t *dl, static void tta_filter_process_c(int32_t *qmi, int32_t *dx, int32_t *dl,
int32_t *error, int32_t *in, int32_t shift, int32_t *error, int32_t *in, int32_t shift,
int32_t round) { int32_t round) {
uint32_t *qm = qmi;
if (*error < 0) { if (*error < 0) {
qm[0] -= dx[0]; qm[1] -= dx[1]; qm[2] -= dx[2]; qm[3] -= dx[3]; qm[0] -= dx[0]; qm[1] -= dx[1]; qm[2] -= dx[2]; qm[3] -= dx[3];
qm[4] -= dx[4]; qm[5] -= dx[5]; qm[6] -= dx[6]; qm[7] -= dx[7]; qm[4] -= dx[4]; qm[5] -= dx[5]; qm[6] -= dx[6]; qm[7] -= dx[7];