| diff --git a/third_party/libjpeg/jdmarker.c b/third_party/libjpeg/jdmarker.c |
| index f4cca8c..c9325af 100644 |
| --- a/third_party/libjpeg/jdmarker.c |
| +++ b/third_party/libjpeg/jdmarker.c |
| @@ -342,6 +342,12 @@ get_sos (j_decompress_ptr cinfo) |
| |
| TRACEMS3(cinfo, 1, JTRC_SOS_COMPONENT, cc, |
| compptr->dc_tbl_no, compptr->ac_tbl_no); |
| + |
| + /* This CSi (cc) should differ from the previous CSi */ |
| + for (ci = 0; ci < i; ci++) { |
| + if (cinfo->cur_comp_info[ci] == compptr) |
| + ERREXIT1(cinfo, JERR_BAD_COMPONENT_ID, cc); |
| + } |
| } |
| |
| /* Collect the additional scan parameters Ss, Se, Ah/Al. */ |
