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avcodec/hevc: Fix integer overflow in WPP entry point range check

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Fixes: out of array access
Fixes: poc.hevc / make_poc.py
Fixes: 83WY4xnR87vb
Fixes: dad354f38d (avcodec/hevc: Check max ctb addresses for WPP)
Found-by: VulnForge Security Research Team <haoyuliu@clouditera.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit ba55f425fd)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2026-06-24 03:00:42 +02:00
parent 52f7983f15
commit d6db779950
1 changed files with 1 additions and 1 deletions
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2
libavcodec/hevc/hevcdec.c
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@@ -2920,7 +2920,7 @@ static int hls_slice_data_wpp(HEVCContext *s, const H2645NAL *nal)
int64_t startheader, cmpt = 0;
int j, res = 0;
if (s->sh.slice_ctb_addr_rs + s->sh.num_entry_point_offsets * sps->ctb_width >= sps->ctb_width * sps->ctb_height) {
if (s->sh.slice_ctb_addr_rs + s->sh.num_entry_point_offsets * (int64_t)sps->ctb_width >= sps->ctb_width * (int64_t)sps->ctb_height) {
av_log(s->avctx, AV_LOG_ERROR, "WPP ctb addresses are wrong (%d %d %d %d)\n",
s->sh.slice_ctb_addr_rs, s->sh.num_entry_point_offsets,
sps->ctb_width, sps->ctb_height