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
Suggested-by: <atomnuker> 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 | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) diff --git a/libavcodec/dirac_vlc.c b/libavcodec/dirac_vlc.c index bd37f31f46..bb525f89d8 100644 --- a/libavcodec/dirac_vlc.c +++ b/libavcodec/dirac_vlc.c @@ -37,7 +37,7 @@ #define APPEND_RESIDUE(N, M) \ N |= M >> (N ## _bits); \ - N ## _bits += (M ## _bits) + N ## _bits = (N ## _bits + (M ## _bits)) & 63 int ff_dirac_golomb_read_32bit(DiracGolombLUT *lut_ctx, const uint8_t *buf, int bytes, uint8_t *_dst, int coeffs) @@ -56,9 +56,6 @@ int ff_dirac_golomb_read_32bit(DiracGolombLUT *lut_ctx, const uint8_t *buf, if ((c_idx + 1) > coeffs) return c_idx; - if (res_bits >= RSIZE_BITS) - res_bits = res = 0; - /* res_bits is a hint for better branch prediction */ if (res_bits && l->sign) { int32_t coeff = 1; @@ -99,9 +96,6 @@ int ff_dirac_golomb_read_16bit(DiracGolombLUT *lut_ctx, const uint8_t *buf, if ((c_idx + 1) > coeffs) return c_idx; - if (res_bits >= RSIZE_BITS) - res_bits = res = 0; - if (res_bits && l->sign) { int32_t coeff = 1; APPEND_RESIDUE(res, l->preamble); -- 2.14.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
