From 1b1182ce97db7a97914bb7713eba66fee5d93937 Mon Sep 17 00:00:00 2001 From: Laurent Aimar Date: Sun, 2 Oct 2011 00:48:11 +0000 Subject: [PATCH] 4xm: prevent NULL dereference with invalid huffman table Signed-off-by: Janne Grunau --- libavcodec/4xm.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/libavcodec/4xm.c b/libavcodec/4xm.c index d428f53275..21bde52fee 100644 --- a/libavcodec/4xm.c +++ b/libavcodec/4xm.c @@ -602,9 +602,10 @@ static const uint8_t *read_huffman_tables(FourXContext *f, const uint8_t * const len_tab[j]= len; } - init_vlc(&f->pre_vlc, ACDC_VLC_BITS, 257, - len_tab , 1, 1, - bits_tab, 4, 4, 0); + if (init_vlc(&f->pre_vlc, ACDC_VLC_BITS, 257, + len_tab , 1, 1, + bits_tab, 4, 4, 0)) + return NULL; return ptr; }