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new 0857141823 avformat/rtpenc_xiph: bail out when the max payload size
underflows
0857141823 is described below
commit 085714182302333dd83dcb9c36cf828dc4eba929
Author: Franciszek Kalinowski <[email protected]>
AuthorDate: Tue May 19 09:34:01 2026 +0200
Commit: michaelni <[email protected]>
CommitDate: Thu May 21 01:15:30 2026 +0000
avformat/rtpenc_xiph: bail out when the max payload size underflows
Reported by Franciszek Kalinowski (isec.pl / striga.ai) and Bartosz
Smigielski.
---
libavformat/rtpenc_xiph.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/libavformat/rtpenc_xiph.c b/libavformat/rtpenc_xiph.c
index 00c29a7d02..afea1eb79f 100644
--- a/libavformat/rtpenc_xiph.c
+++ b/libavformat/rtpenc_xiph.c
@@ -38,6 +38,10 @@ void ff_rtp_send_xiph(AVFormatContext *s1, const uint8_t
*buff, int size)
uint8_t *q;
max_pkt_size = s->max_payload_size - 6; //
ident+frag+tdt/vdt+pkt_num+pkt_length
+ if (max_pkt_size <= 0) {
+ av_log(s1, AV_LOG_ERROR, "Max payload size too small for Xiph RTP\n");
+ return;
+ }
// set xiph data type
switch (*buff) {
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