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commit 69ca310fb76ca423606b46176f0d2e20b1f99760 Author: Michael Niedermayer <[email protected]> AuthorDate: Wed May 20 01:24:54 2026 +0200 Commit: Michael Niedermayer <[email protected]> CommitDate: Sun Jun 14 04:40:53 2026 +0200 avformat/hls: Check TIME-OFFSET value Fixes: UB with out of range values Fixes: poc_overflow.m3u8 Found-by: jiale yao Signed-off-by: Michael Niedermayer <[email protected]> (cherry picked from commit 59094859a8affb9f8715a003d9fa3d0c13041d56) Signed-off-by: Michael Niedermayer <[email protected]> --- libavformat/hls.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/libavformat/hls.c b/libavformat/hls.c index 480b594a0b..2f7142fd4d 100644 --- a/libavformat/hls.c +++ b/libavformat/hls.c @@ -963,9 +963,14 @@ static int parse_playlist(HLSContext *c, const char *url, goto fail; } if (av_strstart(ptr, "TIME-OFFSET=", &time_offset_value)) { - float offset = strtof(time_offset_value, NULL); - pls->start_time_offset = offset * AV_TIME_BASE; - pls->time_offset_flag = 1; + double offset = strtod(time_offset_value, NULL) * AV_TIME_BASE; + if (offset >= -0x1p63 && offset < 0x1p63) { + pls->start_time_offset = offset; + pls->time_offset_flag = 1; + } else { + av_log(c->ctx, AV_LOG_WARNING, "TIME-OFFSET value is" + "invalid, it will be ignored"); + } } else { av_log(c->ctx, AV_LOG_WARNING, "#EXT-X-START value is" "invalid, it will be ignored"); _______________________________________________ ffmpeg-cvslog mailing list -- [email protected] To unsubscribe send an email to [email protected]
