From bf33a384995ac21aa41422c6246ebdc5d9632452 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Tue, 8 Feb 2022 00:30:59 +0100 Subject: [PATCH] avformat/hls: Use unsigned for iv computation Fixes: signed integer overflow: 9223372036854775748 + 60 cannot be represented in type 'long' Fixes: 44417/clusterfuzz-testcase-minimized-ffmpeg_dem_HLS_fuzzer-5802443881971712 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Reviewed-by: Steven Liu Signed-off-by: Michael Niedermayer --- libavformat/hls.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavformat/hls.c b/libavformat/hls.c index 44afdaab42..06bc46c23f 100644 --- a/libavformat/hls.c +++ b/libavformat/hls.c @@ -914,7 +914,7 @@ static int parse_playlist(HLSContext *c, const char *url, if (has_iv) { memcpy(seg->iv, iv, sizeof(iv)); } else { - int64_t seq = pls->start_seq_no + pls->n_segments; + uint64_t seq = pls->start_seq_no + (uint64_t)pls->n_segments; memset(seg->iv, 0, sizeof(seg->iv)); AV_WB64(seg->iv + 8, seq); }