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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-11-01 16:00:20 +0300 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-01-09 01:19:14 +0300 |
| commit | 4730046891069c80bdcf773972d2c91f1dc31327 (patch) | |
| tree | cfd48560cb448e0b54ff0e178a1d43d04f642ea5 | |
| parent | 4e87ab803ad53168dce5beb78e0e0cc6995c4a04 (diff) | |
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 <michael@niedermayer.cc>
(cherry picked from commit 981e99ab99986935affad7c164ebdfe28e8ea7f8)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/sbrdsp_fixed.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/libavcodec/sbrdsp_fixed.c b/libavcodec/sbrdsp_fixed.c index f45bb847a8..07ef12117c 100644 --- a/libavcodec/sbrdsp_fixed.c +++ b/libavcodec/sbrdsp_fixed.c @@ -233,12 +233,14 @@ 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)); + } } } |