From 5eb04570f6609d7e9706f2ce8b61119605e3a0a2 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Thu, 23 Feb 2017 15:19:29 +0100 Subject: avcodec/wavpack: Check post_shift Fixes: runtime error: shift exponent 34 is too large for 32-bit type 'int' Fixes: 653/clusterfuzz-testcase-5773837415219200 Signed-off-by: Michael Niedermayer --- libavcodec/wavpack.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'libavcodec/wavpack.c') diff --git a/libavcodec/wavpack.c b/libavcodec/wavpack.c index 24d57f57db..eeee6a6ae4 100644 --- a/libavcodec/wavpack.c +++ b/libavcodec/wavpack.c @@ -681,6 +681,9 @@ static int wavpack_decode_block(AVCodecContext *avctx, int block_no, s->hybrid = s->frame_flags & WV_HYBRID_MODE; s->hybrid_bitrate = s->frame_flags & WV_HYBRID_BITRATE; s->post_shift = bpp * 8 - orig_bpp + ((s->frame_flags >> 13) & 0x1f); + if (s->post_shift < 0 || s->post_shift > 31) { + return AVERROR_INVALIDDATA; + } s->hybrid_maxclip = ((1LL << (orig_bpp - 1)) - 1); s->hybrid_minclip = ((-1UL << (orig_bpp - 1))); s->CRC = bytestream2_get_le32(&gb); -- cgit v1.2.3