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Prevent NULL dereference when the huffman table is invalid in the 4xm decoder.

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 4a8ff0636d67c6df059f2ae2df49ad1181de14ca)
This commit is contained in:
Laurent Aimar 2011-10-02 00:38:28 +02:00 committed by Michael Niedermayer
parent 2e342df4a2
commit 535112b365
1 changed files with 4 additions and 3 deletions
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7
libavcodec/4xm.c
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@ -601,9 +601,10 @@ 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;
}