Fixes: signed integer overflow: 1270564968 + 904828220 cannot be represented in type 'int' Fixes: 15402/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ALS_fuzzer-5755426823471104
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavcodec/alsdec.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavcodec/alsdec.c b/libavcodec/alsdec.c index 5eb2a58aaf..8201deb366 100644 --- a/libavcodec/alsdec.c +++ b/libavcodec/alsdec.c @@ -507,7 +507,7 @@ static void parcor_to_lpc(unsigned int k, const int32_t *par, int32_t *cof) int i, j; for (i = 0, j = k - 1; i < j; i++, j--) { - int tmp1 = ((MUL64(par[k], cof[j]) + (1 << 19)) >> 20); + unsigned tmp1 = ((MUL64(par[k], cof[j]) + (1 << 19)) >> 20); cof[j] += ((MUL64(par[k], cof[i]) + (1 << 19)) >> 20); cof[i] += tmp1; } @@ -980,7 +980,7 @@ static int decode_var_block_data(ALSDecContext *ctx, ALSBlockData *bd) y = 1 << 19; for (sb = -opt_order; sb < 0; sb++) - y += MUL64(lpc_cof[sb], raw_samples[sb]); + y += (uint64_t)MUL64(lpc_cof[sb], raw_samples[sb]); *raw_samples -= y >> 20; } -- 2.22.0 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
