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qdm2: check array index before use, fix out of array accesses

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Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

(cherry picked from commit a7ee6281f7)

CC: libav-stable@libav.org

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
This commit is contained in:
Michael Niedermayer 2012-11-30 23:59:40 +01:00 committed by Reinhard Tartler
parent 1f8f43a5b5
commit 39bec05ed4
1 changed files with 5 additions and 0 deletions
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5
libavcodec/qdm2.c
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@ -1232,6 +1232,11 @@ static void qdm2_decode_super_block (QDM2Context *q)
for (i = 0; packet_bytes > 0; i++) { for (i = 0; packet_bytes > 0; i++) {
int j; int j;
if (i >= FF_ARRAY_ELEMS(q->sub_packet_list_A)) {
SAMPLES_NEEDED_2("too many packet bytes");
return;
}
q->sub_packet_list_A[i].next = NULL; q->sub_packet_list_A[i].next = NULL;
if (i > 0) { if (i > 0) {