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 <mich...@niedermayer.cc> --- libavcodec/dirac_vlc.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/libavcodec/dirac_vlc.c b/libavcodec/dirac_vlc.c index bd37f31f46..a475d3b0bc 100644 --- a/libavcodec/dirac_vlc.c +++ b/libavcodec/dirac_vlc.c @@ -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; -- 2.14.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
