RepoMirrors
/
ffmpeg
mirror of https://git.ffmpeg.org/ffmpeg.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

avcodec/jpeglsdec: Check Jpeg-LS LSE 

Fixes: signed integer overflow: 2147478526 + 33924 cannot be represented in type 'int'
Fixes: shift exponent 32 is too large for 32-bit type 'unsigned int'
Fixes: 64243/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEGLS_fuzzer-5195717848989696

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 c72a20f01a)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2023-12-15 22:23:33 +01:00
parent c292c15e4a
commit de65d41b70
No known key found for this signature in database
GPG Key ID: B18E8928B3948D64
1 changed files with 13 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
libavcodec/jpeglsdec.c
View File

@ -373,6 +373,19 @@ int ff_jpegls_decode_picture(MJpegDecodeContext *s, int near,
state->T3 = s->t3;
state->reset = s->reset;
ff_jpegls_reset_coding_parameters(state, 0);
/* Testing parameters here, we cannot test in LSE or SOF because
* these interdepend and are allowed in either order
*/
if (state->maxval >= (1<<state->bpp) ||
state->T1 > state->T2 ||
state->T2 > state->T3 ||
state->T3 > state->maxval ||
state->reset > FFMAX(255, state->maxval)) {
ret = AVERROR_INVALIDDATA;
goto end;
}
ff_jpegls_init_state(state);
if (s->bits <= 8)