@@ -63,6 +63,8 @@ int ff_dirac_golomb_read_32bit(DiracGolombLUT *lut_ctx, const uint8_t *buf,
if (res_bits && l->sign) {
int32_t coeff = 1;
APPEND_RESIDUE(res, l->preamble);
+ if (res_bits >= RSIZE_BITS)
+ res_bits = res = 0;
for (i = 0; i < (res_bits >> 1) - 1; i++) {
coeff <<= 1;
coeff |= (res >> (RSIZE_BITS - 2*i - 2)) & 1;
@@ -105,6 +107,8 @@ int ff_dirac_golomb_read_16bit(DiracGolombLUT *lut_ctx, const uint8_t *buf,
if (res_bits && l->sign) {
int32_t coeff = 1;
APPEND_RESIDUE(res, l->preamble);
+ if (res_bits >= RSIZE_BITS)
+ res_bits = res = 0;
for (i = 0; i < (res_bits >> 1) - 1; i++) {
coeff <<= 1;
coeff |= (res >> (RSIZE_BITS - 2*i - 2)) & 1;
Fixes: runtime error: left shift of 1073741838 by 1 places cannot be represented in type 'int32_t' (aka 'int') Fixes: 3279/clusterfuzz-testcase-minimized-4564805744590848 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> --- libavcodec/dirac_vlc.c | 4 ++++ 1 file changed, 4 insertions(+)