[FFmpeg-cvslog] avcodec/ivi_dsp: Fix multiple runtime error: left shift of negative value -71
Michael Niedermayer
git at videolan.org
Tue Jun 6 01:04:10 EEST 2017
ffmpeg | branch: release/2.8 | Michael Niedermayer <michael at niedermayer.cc> | Mon May 22 01:19:50 2017 +0200| [5148395e86e64303217fc8f9e5d13fe50ea3bea9] | committer: Michael Niedermayer
avcodec/ivi_dsp: Fix multiple runtime error: left shift of negative value -71
Fixes: 1734/clusterfuzz-testcase-minimized-5385630815092736
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 8fb00b3e858b7a5aeccfe6bdfc10290c2121c3ec)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=5148395e86e64303217fc8f9e5d13fe50ea3bea9
---
libavcodec/ivi_dsp.c | 30 +++++++++++++++---------------
1 file changed, 15 insertions(+), 15 deletions(-)
diff --git a/libavcodec/ivi_dsp.c b/libavcodec/ivi_dsp.c
index 6f79ada1d5..7922751fdc 100644
--- a/libavcodec/ivi_dsp.c
+++ b/libavcodec/ivi_dsp.c
@@ -116,10 +116,10 @@ void ff_ivi_recompose53(const IVIPlaneDesc *plane, uint8_t *dst,
b0_2 = b0_ptr[pitch+indx+1];
tmp1 = tmp0 + b0_1;
- p0 = tmp0 << 4;
- p1 = tmp1 << 3;
- p2 = (tmp0 + tmp2) << 3;
- p3 = (tmp1 + tmp2 + b0_2) << 2;
+ p0 = tmp0 * 16;
+ p1 = tmp1 * 8;
+ p2 = (tmp0 + tmp2) * 8;
+ p3 = (tmp1 + tmp2 + b0_2) * 4;
}
/* process the HL-band by applying HPF vertically and LPF horizontally */
@@ -132,10 +132,10 @@ void ff_ivi_recompose53(const IVIPlaneDesc *plane, uint8_t *dst,
tmp2 = tmp1 - tmp0*6 + b1_3;
b1_3 = b1_1 - b1_2*6 + b1_ptr[pitch+indx+1];
- p0 += (tmp0 + tmp1) << 3;
- p1 += (tmp0 + tmp1 + b1_1 + b1_2) << 2;
- p2 += tmp2 << 2;
- p3 += (tmp2 + b1_3) << 1;
+ p0 += (tmp0 + tmp1) * 8;
+ p1 += (tmp0 + tmp1 + b1_1 + b1_2) * 4;
+ p2 += tmp2 * 4;
+ p3 += (tmp2 + b1_3) * 2;
}
/* process the LH-band by applying LPF vertically and HPF horizontally */
@@ -146,10 +146,10 @@ void ff_ivi_recompose53(const IVIPlaneDesc *plane, uint8_t *dst,
tmp0 = b2_1 + b2_2;
tmp1 = b2_1 - b2_2*6 + b2_3;
- p0 += tmp0 << 3;
- p1 += tmp1 << 2;
- p2 += (tmp0 + b2_4 + b2_5) << 2;
- p3 += (tmp1 + b2_4 - b2_5*6 + b2_6) << 1;
+ p0 += tmp0 * 8;
+ p1 += tmp1 * 4;
+ p2 += (tmp0 + b2_4 + b2_5) * 4;
+ p3 += (tmp1 + b2_4 - b2_5*6 + b2_6) * 2;
}
/* process the HH-band by applying HPF both vertically and horizontally */
@@ -163,9 +163,9 @@ void ff_ivi_recompose53(const IVIPlaneDesc *plane, uint8_t *dst,
b3_9 = b3_3 - b3_6*6 + b3_ptr[pitch+indx+1];
- p0 += (tmp0 + tmp1) << 2;
- p1 += (tmp0 - tmp1*6 + tmp2) << 1;
- p2 += (b3_7 + b3_8) << 1;
+ p0 += (tmp0 + tmp1) * 4;
+ p1 += (tmp0 - tmp1*6 + tmp2) * 2;
+ p2 += (b3_7 + b3_8) * 2;
p3 += b3_7 - b3_8*6 + b3_9;
}
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