libvips/fuzz/mosaic_fuzzer.cc

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#include <vips/vips.h>
struct mosaic_opt {
guint8 dir : 1;
guint16 xref;
guint16 yref;
guint16 xsec;
guint16 ysec;
};
extern "C" int
LLVMFuzzerInitialize( int *argc, char ***argv )
{
vips_concurrency_set( 1 );
return( 0 );
}
extern "C" int
LLVMFuzzerTestOneInput( const guint8 *data, size_t size )
{
VipsImage *ref, *sec, *out;
struct mosaic_opt *opt;
double d;
if( size < sizeof( struct mosaic_opt ) )
return( 0 );
if( !(ref = vips_image_new_from_buffer( data, size, "", NULL )) )
return( 0 );
if( ref->Xsize > 100 ||
ref->Ysize > 100 ||
ref->Bands > 4 ) {
g_object_unref( ref );
return( 0 );
}
if( vips_rot180( ref, &sec, NULL ) ) {
g_object_unref( ref );
return( 0 );
}
/* Extract some bytes from the tail to fuzz the arguments of the API.
*/
opt = (struct mosaic_opt *) (data + size - sizeof( struct mosaic_opt ));
if( vips_mosaic( ref, sec, &out, (VipsDirection) opt->dir,
opt->xref, opt->yref, opt->xsec, opt->ysec, NULL ) ) {
g_object_unref( sec );
g_object_unref( ref );
return( 0 );
}
vips_max( out, &d, NULL );
g_object_unref( out );
g_object_unref( sec );
g_object_unref( ref );
return( 0 );
}