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-rw-r--r--libavformat/asfdec_o.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/libavformat/asfdec_o.c b/libavformat/asfdec_o.c
index a546ec735e..a17c953f06 100644
--- a/libavformat/asfdec_o.c
+++ b/libavformat/asfdec_o.c
@@ -1366,6 +1366,8 @@ static int asf_read_packet_header(AVFormatContext *s)
unsigned char error_flags, len_flags, pay_flags;
asf->packet_offset = avio_tell(pb);
+ if (asf->packet_offset > INT64_MAX/2)
+ asf->packet_offset = 0;
error_flags = avio_r8(pb); // read Error Correction Flags
if (error_flags & ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT) {
if (!(error_flags & ASF_ERROR_CORRECTION_LENGTH_TYPE)) {