[FFmpeg-cvslog] r26360 - trunk/libavcodec/ivi_common.c

[cehoyos]

Author: cehoyos
Date: Sat Jan 15 11:18:38 2011
New Revision: 26360

Log:
Check symbol validity to avoid a crash, fixes issue 2523.

Patch by Daniel Kang, daniel.d.kang at gmail

Modified:
   trunk/libavcodec/ivi_common.c

Modified: trunk/libavcodec/ivi_common.c
==============================================================================
--- trunk/libavcodec/ivi_common.c	Sat Jan 15 02:59:31 2011	(r26359)
+++ trunk/libavcodec/ivi_common.c	Sat Jan 15 11:18:38 2011	(r26360)
@@ -404,6 +404,10 @@ int ff_ivi_decode_blocks(GetBitContext *
                         hi  = get_vlc2(gb, band->blk_vlc.tab->table, IVI_VLC_BITS, 1);
                         val = IVI_TOSIGNED((hi << 6) | lo); /* merge them and convert into signed val */
                     } else {
+                        if (sym >= 256U) {
+                            av_log(NULL, AV_LOG_ERROR, "Invalid sym encountered: %d.\n", sym);
+                            return -1;
+                        }
                         run = rvmap->runtab[sym];
                         val = rvmap->valtab[sym];
                     }