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avcodec/jpeg2000: Only allocate Jpeg2000Pass for the encoder 

Reduces memory needed.
Fixes: OOM
Fixes: 4427/clusterfuzz-testcase-minimized-5106919271301120

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-11-30 21:51:56 +01:00
parent 0674087004
commit b5587fd2c6
3 changed files with 5 additions and 2 deletions
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4
libavcodec/j2kenc.c
View File

@ -941,7 +941,9 @@ static int encode_tile(Jpeg2000EncoderContext *s, Jpeg2000Tile *tile, int tileno
}
if (!prec->cblk[cblkno].data)
prec->cblk[cblkno].data = av_malloc(1 + 8192);
if (!prec->cblk[cblkno].data)
if (!prec->cblk[cblkno].passes)
prec->cblk[cblkno].passes = av_malloc_array(JPEG2000_MAX_PASSES, sizeof (*prec->cblk[cblkno].passes));
if (!prec->cblk[cblkno].data || !prec->cblk[cblkno].passes)
return AVERROR(ENOMEM);
encode_cblk(s, &t1, prec->cblk + cblkno, tile, xx1 - xx0, yy1 - yy0,
bandpos, codsty->nreslevels - reslevelno - 1);

1
libavcodec/jpeg2000.c
View File

@ -606,6 +606,7 @@ void ff_jpeg2000_cleanup(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty)
for (cblkno = 0; cblkno < nb_code_blocks; cblkno ++) {
Jpeg2000Cblk *cblk = &prec->cblk[cblkno];
av_freep(&cblk->data);
av_freep(&cblk->passes);
}
av_freep(&prec->cblk);
}

2
libavcodec/jpeg2000.h
View File

@ -173,7 +173,7 @@ typedef struct Jpeg2000Cblk {
int nb_terminations;
int nb_terminationsinc;
int data_start[JPEG2000_MAX_PASSES];
Jpeg2000Pass passes[JPEG2000_MAX_PASSES];
Jpeg2000Pass *passes;
int coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}}
} Jpeg2000Cblk; // code block