From: NOKUBI Takatsugu <knok@daionet.gr.jp>
Date: Fri, 30 Aug 2019 11:33:15 +0900
Subject: check error for jpeg_read_scanlines

---
 src/loader.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/loader.c b/src/loader.c
index cb1e61f..823571d 100644
--- a/src/loader.c
+++ b/src/loader.c
@@ -195,7 +195,12 @@ load_jpeg(unsigned char **result,
 
     while (cinfo.output_scanline < cinfo.output_height) {
         jpeg_read_scanlines(&cinfo, buffer, 1);
-        memcpy(*result + (cinfo.output_scanline - 1) * row_stride, buffer[0], row_stride);
+        if (cinfo.err->num_warnings > 0) {
+            sixel_helper_set_additional_message(
+                "jpeg_read_scanlines: error/warining occuered.");
+            status = SIXEL_BAD_INPUT;
+            goto end;
+        }        memcpy(*result + (cinfo.output_scanline - 1) * row_stride, buffer[0], row_stride);
     }
 
     status = SIXEL_OK;