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avcodec/interplayacm: Fix integer overflows in juggle()

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Fixes: signed integer overflow: -760459023 + -1520918047 cannot be represented in type 'int'
Fixes: 17994/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_INTERPLAY_ACM_fuzzer-5647123042795520

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-10-07 18:09:11 +02:00
parent 4834ec926a
commit 3948d80842
1 changed files with 2 additions and 1 deletions
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libavcodec/interplayacm.c
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@ -435,7 +435,8 @@ static int fill_block(InterplayACMContext *s)
static void juggle(int *wrap_p, int *block_p, unsigned sub_len, unsigned sub_count)
{
unsigned i, j;
int *p, r0, r1, r2, r3;
int *p;
unsigned int r0, r1, r2, r3;
for (i = 0; i < sub_len; i++) {
p = block_p;