shithub: jbig2

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jbig2dec: Handle very large symbol code lengths without overflowing.

--- a/jbig2_symbol_dict.c

+++ b/jbig2_symbol_dict.c

@@ -342,7 +342,7 @@

         tparams.IADS = jbig2_arith_int_ctx_new(ctx);

         tparams.IAIT = jbig2_arith_int_ctx_new(ctx);

         /* Table 31 */

-        for (SBSYMCODELEN = 0; (1 << SBSYMCODELEN) < (int)(params->SDNUMINSYMS + params->SDNUMNEWSYMS); SBSYMCODELEN++);

+        for (SBSYMCODELEN = 0; ((uint64_t) 1 << SBSYMCODELEN) < ((uint64_t) params->SDNUMINSYMS + params->SDNUMNEWSYMS); SBSYMCODELEN++);

         tparams.IAID = jbig2_arith_iaid_ctx_new(ctx, SBSYMCODELEN);

         tparams.IARI = jbig2_arith_int_ctx_new(ctx);

         tparams.IARDW = jbig2_arith_int_ctx_new(ctx);