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Stop JPEG load after 100 warnings (#2749)

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See: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=24383
This commit is contained in:
Kleis Auke Wolthuizen 2022-04-05 11:07:29 +02:00
parent 2dc319b1b1
commit df26bd1e46
1 changed files with 25 additions and 0 deletions
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25
libvips/foreign/jpeg2vips.c
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@ -314,6 +314,30 @@ readjpeg_open_input( ReadJpeg *jpeg )
return( 0 );
}
static void
readjpeg_emit_message( j_common_ptr cinfo, int msg_level )
{
long num_warnings;
if( msg_level < 0 ) {
/* Always count warnings in num_warnings.
*/
num_warnings = cinfo->err->num_warnings++;
/* Corrupt files may give many warnings, the policy here is to
* show only the first warning and treat many warnings as fatal.
*/
if( num_warnings == 0 )
(*cinfo->err->output_message)( cinfo );
else if( num_warnings >= 100 )
cinfo->err->error_exit( cinfo );
}
else if( cinfo->err->trace_level >= msg_level )
/* It's a trace message. Show it if trace_level >= msg_level.
*/
(*cinfo->err->output_message)( cinfo );
}
/* This can be called many times.
*/
static int
@ -370,6 +394,7 @@ readjpeg_new( VipsSource *source, VipsImage *out,
jpeg->fail_on = fail_on;
jpeg->cinfo.err = jpeg_std_error( &jpeg->eman.pub );
jpeg->eman.pub.error_exit = vips__new_error_exit;
jpeg->eman.pub.emit_message = readjpeg_emit_message;
jpeg->eman.pub.output_message = vips__new_output_message;
jpeg->eman.fp = NULL;
jpeg->y_pos = 0;