diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-05-04 18:22:40 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-06-18 18:58:25 +0200 |
| commit | 85b883429fb1a8c1be2e39fee510315a92b6cd02 (patch) | |
| tree | 6f7a27a63efd2916d528a40f989fcf78b97e953f /libavutil/tx.c | |
| parent | c067d20177613e9cf74bcbd2a26e729ef7ababdb (diff) | |
avutil/tx: avoid negative left shifts
Fixes: left shift of negative value -1
Fixes: 33736/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SIREN_fuzzer-6657785795313664
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavutil/tx.c')
| -rw-r--r-- | libavutil/tx.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavutil/tx.c b/libavutil/tx.c index 8da04e99ca..25adb6b37e 100644 --- a/libavutil/tx.c +++ b/libavutil/tx.c @@ -97,9 +97,9 @@ static inline int split_radix_permutation(int i, int m, int inverse) if (m <= 1) return i & 1; if (!(i & m)) - return (split_radix_permutation(i, m, inverse) << 1); + return split_radix_permutation(i, m, inverse) * 2; m >>= 1; - return (split_radix_permutation(i, m, inverse) << 2) + 1 - 2*(!(i & m) ^ inverse); + return split_radix_permutation(i, m, inverse) * 4 + 1 - 2*(!(i & m) ^ inverse); } int ff_tx_gen_ptwo_revtab(AVTXContext *s, int invert_lookup) |