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Fix CVE-2014-8157 - dec->numtiles off-by-one check in jpc_dec_process_sot()

From https://bugzilla.redhat.com/show_bug.cgi?id=1179282

​

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>

​

diff -up jasper-1.900.1/src/libjasper/jpc/jpc_dec.c.CVE-2014-8157 jasper-1.900.1/src/libjasper/jpc/jpc_dec.c

--- jasper-1.900.1/src/libjasper/jpc/jpc_dec.c.CVE-2014-8157    2015-01-19 16:59:36.000000000 +0100

+++ jasper-1.900.1/src/libjasper/jpc/jpc_dec.c  2015-01-19 17:07:41.609863268 +0100

@@ -489,7 +489,7 @@ static int jpc_dec_process_sot(jpc_dec_t

        dec->curtileendoff = 0;

    }

-   if (JAS_CAST(int, sot->tileno) > dec->numtiles) {

+   if (JAS_CAST(int, sot->tileno) >= dec->numtiles) {

        jas_eprintf("invalid tile number in SOT marker segment\n");

        return -1;

    }