From 981e99ab99986935affad7c164ebdfe28e8ea7f8 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Wed, 1 Nov 2017 14:00:20 +0100 Subject: avcodec/sbrdsp_fixed: Fix integer overflow in shift in sbr_hf_g_filt_c() Fixes: runtime error: shift exponent 66 is too large for 64-bit type 'long long' Fixes: 3642/clusterfuzz-testcase-minimized-5443853801750528 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/sbrdsp_fixed.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) (limited to 'libavcodec/sbrdsp_fixed.c') diff --git a/libavcodec/sbrdsp_fixed.c b/libavcodec/sbrdsp_fixed.c index 896b2d75c6..a0ef6859f1 100644 --- a/libavcodec/sbrdsp_fixed.c +++ b/libavcodec/sbrdsp_fixed.c @@ -244,12 +244,14 @@ static void sbr_hf_g_filt_c(int (*Y)[2], const int (*X_high)[40][2], int64_t accu; for (m = 0; m < m_max; m++) { - int64_t r = 1LL << (22-g_filt[m].exp); - accu = (int64_t)X_high[m][ixh][0] * ((g_filt[m].mant + 0x40)>>7); - Y[m][0] = (int)((accu + r) >> (23-g_filt[m].exp)); + if (22 - g_filt[m].exp < 61) { + int64_t r = 1LL << (22-g_filt[m].exp); + accu = (int64_t)X_high[m][ixh][0] * ((g_filt[m].mant + 0x40)>>7); + Y[m][0] = (int)((accu + r) >> (23-g_filt[m].exp)); - accu = (int64_t)X_high[m][ixh][1] * ((g_filt[m].mant + 0x40)>>7); - Y[m][1] = (int)((accu + r) >> (23-g_filt[m].exp)); + accu = (int64_t)X_high[m][ixh][1] * ((g_filt[m].mant + 0x40)>>7); + Y[m][1] = (int)((accu + r) >> (23-g_filt[m].exp)); + } } } -- cgit v1.2.3