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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-05-21 00:06:10 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-05-21 02:37:01 +0200 |
| commit | 6bd5fcc463c57ced03087bec9160dbdf461be174 (patch) | |
| tree | badedd7f61716a2fb8a1b1e658ee5fe678f064a1 | |
| parent | f6fbc874d1e34cc2f7a028478d47c45547eb6d4c (diff) | |
| download | ffmpeg-6bd5fcc463c57ced03087bec9160dbdf461be174.tar.gz | |
avcodec/aacsbr_fixed: Fix multiple runtime error: shift exponent 170 is too large for 32-bit type 'int'
Fixes part of 1709/clusterfuzz-testcase-minimized-4513580554649600
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 6310fc714de3cd73848416ead73228fcef8b6dc0)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/aacsbr_fixed.c | 25 |
1 files changed, 15 insertions, 10 deletions
diff --git a/libavcodec/aacsbr_fixed.c b/libavcodec/aacsbr_fixed.c index 480062dfcc..01f81afaaa 100644 --- a/libavcodec/aacsbr_fixed.c +++ b/libavcodec/aacsbr_fixed.c @@ -575,20 +575,25 @@ static void sbr_hf_assemble(int Y1[38][64][2], SoftFloat *in = sbr->s_m[e]; for (m = 0; m+1 < m_max; m+=2) { - shift = 22 - in[m ].exp; - round = 1 << (shift-1); - out[2*m ] += (in[m ].mant * A + round) >> shift; + shift = 22 - in[m ].exp; + if (shift < 32) { + round = 1 << (shift-1); + out[2*m ] += (in[m ].mant * A + round) >> shift; + } - shift = 22 - in[m+1].exp; - round = 1 << (shift-1); - out[2*m+2] += (in[m+1].mant * B + round) >> shift; + shift = 22 - in[m+1].exp; + if (shift < 32) { + round = 1 << (shift-1); + out[2*m+2] += (in[m+1].mant * B + round) >> shift; + } } if(m_max&1) { - shift = 22 - in[m ].exp; - round = 1 << (shift-1); - - out[2*m ] += (in[m ].mant * A + round) >> shift; + shift = 22 - in[m ].exp; + if (shift < 32) { + round = 1 << (shift-1); + out[2*m ] += (in[m ].mant * A + round) >> shift; + } } } indexnoise = (indexnoise + m_max) & 0x1ff; |