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17 Commits

Author SHA1 Message Date
Michael Niedermayer
907699d120 avcodec/scpr: Check for min > max in decompress_p() 
Fixes: Timeout
Fixes: 9342/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SCPR_fuzzer-4795990841229312

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 3378194ce8e9a126a7cc6ed57bedde1221790469)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2018-11-01 00:52:46 +01:00
Michael Niedermayer
55e6c6b5fe avcodec/scpr: Fix reading a pixel before the first 
Fixes: 5540/clusterfuzz-testcase-minimized-6122458273808384

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 0fb33a82890753233225c61863fff1fcc9d970d4)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2018-04-13 00:35:15 +02:00
Michael Niedermayer
b590758298 avcodec/scpr: optimize shift loop. 
Speeds code up from 50sec to 15sec

Fixes Timeout
Fixes: 3242/clusterfuzz-testcase-5811951672229888

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 981f04b2ae2d6e0355386aaff39840eb5d390a36)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2017-09-11 13:28:21 +02:00
Michael Niedermayer
21d50c185d avcodec/scpr: mask bits to prevent out of array read 
Fixes: 1615/clusterfuzz-testcase-minimized-6625214647500800

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 5666b95c9f27efa6f9b1e1bb6c592b9a8d78bca5)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2017-06-02 01:14:38 +02:00
Michael Niedermayer
d1dd90ae54 avcodec/scpr: Fix multiple runtime error: index 256 out of bounds for type 'unsigned int [256]' 
Fixes: 1519/clusterfuzz-testcase-minimized-5286680976162816

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 2171dfae8c065878a2e130390eb78cf2947a5b69)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2017-05-14 00:21:50 +02:00
Michael Niedermayer
79f6a1b96e avcodec/scpr: Check y in first line loop in decompress_i() 
Fixes: out of array access
Fixes: 1478/clusterfuzz-testcase-minimized-5285486908145664

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 7ac5067146613997bb38442cb022d7f41321a706)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2017-05-14 00:21:49 +02:00
Paul B Mahol
807d5dcde9 avcodec/scpr: use correct linesize for prev frame 
Signed-off-by: Paul B Mahol <onemda@gmail.com>
 2017-03-12 12:34:55 +01:00
Paul B Mahol
6d93e7d1a3 avcodec/scpr: fix top left prediction for special case when x is 0 for keyframes 
Signed-off-by: Paul B Mahol <onemda@gmail.com>
 2017-03-03 12:28:24 +01:00
Paul B Mahol
86ab6b6e08 avcodec/scpr: check if total_freq is 0 in decode0 
Fixes SIGFPE, closes #6196.

Signed-off-by: Paul B Mahol <onemda@gmail.com>
 2017-02-27 13:55:15 +01:00
Paul B Mahol
6d856b2579 avcodec/scpr: add support for older version 
Signed-off-by: Paul B Mahol <onemda@gmail.com>
 2017-02-26 22:09:54 +01:00
Paul B Mahol
e01c32f260 avcodec/scpr: remove 4 dead store 
Signed-off-by: Paul B Mahol <onemda@gmail.com>
 2017-02-24 19:49:39 +01:00
Paul B Mahol
0a28c50506 avcodec/scpr: improve motion vectors checking for out of buffer write 
Signed-off-by: Paul B Mahol <onemda@gmail.com>
 2017-02-24 15:27:19 +01:00
Paul B Mahol
178cd50c47 avcodec/scpr: make sure that component value is <= 0x1F for 16 bpc 
Signed-off-by: Paul B Mahol <onemda@gmail.com>
 2017-02-24 12:02:48 +01:00
Paul B Mahol
45ed942e7e avcodec/scpr: improve check for out of range motion vectors 
Signed-off-by: Paul B Mahol <onemda@gmail.com>
 2017-02-23 19:45:12 +01:00
Paul B Mahol
95a5af446b avcodec/scpr: check that current row is in valid range 
Stops writing out of dst array.

Signed-off-by: Paul B Mahol <onemda@gmail.com>
 2017-02-23 18:46:24 +01:00
Paul B Mahol
fd7af82c53 avcodec/scpr: do not allow out of array access for 16bit case 
Signed-off-by: Paul B Mahol <onemda@gmail.com>
 2017-02-23 17:22:01 +01:00
Paul B Mahol
039011b6b0 avcodec: add ScreenPressor decoder 
Signed-off-by: Paul B Mahol <onemda@gmail.com>
 2017-02-22 22:57:59 +01:00