From: Sanjay Jangid <sanjayjangid20m@gmail.com>
To: ffmpeg-devel@ffmpeg.org
Subject: [FFmpeg-devel] [PATCH] avformat/mov: prevent excessive allocation in mov_read_udta_string
Date: Wed, 30 Jul 2025 17:02:16 +0530
Message-ID: <58B165F0-8252-41E3-BDE4-39909079EAD6@gmail.com> (raw)
Signed-off-by: Sanjay Jangid <sanjayjangid20m@gmail.com>
---
libavformat/mov.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/libavformat/mov.c b/libavformat/mov.c
index c935bbf..725a9fa 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -459,6 +459,10 @@ retry:
data_type = avio_rb32(pb); // type
avio_rb32(pb); // unknown
str_size = data_size - 16;
+ if (str_size >= INT_MAX / 2) {
+ av_log(c->fc, AV_LOG_ERROR, "str_size is too large\n");
+ return AVERROR_INVALIDDATA;
+ }
atom.size -= 16;
if (!key && c->found_hdlr_mdta && c->meta_keys) {
--
2.50.1
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