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

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

Originally committed as revision 26360 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Daniel Kang 2011-01-15 10:18:38 +00:00 committed by Carl Eugen Hoyos
parent 0db5d2b09e
commit eb40d7ffa7
1 changed files with 4 additions and 0 deletions
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4
libavcodec/ivi_common.c
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@ -404,6 +404,10 @@ int ff_ivi_decode_blocks(GetBitContext *gb, IVIBandDesc *band, IVITile *tile)
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];
}