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--- a/jdmarker.c
+++ b/jdmarker.c
@@ -304,7 +304,7 @@
/* Process a SOS marker */
{
INT32 length;
- int i, ci, n, c, cc;
+ int i, ci, n, c, cc, pi;
jpeg_component_info * compptr;
INPUT_VARS(cinfo);
@@ -348,6 +348,13 @@
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 (pi = 0; pi < i; pi++) {
+ if (cinfo->cur_comp_info[pi] == compptr) {
+ ERREXIT1(cinfo, JERR_BAD_COMPONENT_ID, cc);
+ }
+ }
}
/* Collect the additional scan parameters Ss, Se, Ah/Al. */
@@ -464,6 +471,8 @@
for (i = 0; i < count; i++)
INPUT_BYTE(cinfo, huffval[i], return FALSE);
+
+ MEMZERO(&huffval[count], (256 - count) * SIZEOF(UINT8));
length -= count;
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