From f4bb72d33db2f12a3b4666c6843479d718ceecaf Mon Sep 17 00:00:00 2001 From: Luca Barbato Date: Wed, 1 May 2013 19:01:11 +0200 Subject: [PATCH] id3v2: check for end of file while unescaping tags Prevent an out of buffer bound write. Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind CC:libav-stable@libav.org (cherry picked from commit af4cc2605c7a56ecfd84c264aa2b325020418472) Signed-off-by: Luca Barbato --- libavformat/id3v2.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/libavformat/id3v2.c b/libavformat/id3v2.c index a7d3549e17..f69ac034ff 100644 --- a/libavformat/id3v2.c +++ b/libavformat/id3v2.c @@ -510,9 +510,10 @@ static void ff_id3v2_parse(AVFormatContext *s, int len, uint8_t version, uint8_t goto seek; } b = buffer; - while (avio_tell(s->pb) < end) { + while (avio_tell(s->pb) < end && !s->pb->eof_reached) { *b++ = avio_r8(s->pb); - if (*(b - 1) == 0xff && avio_tell(s->pb) < end - 1) { + if (*(b - 1) == 0xff && avio_tell(s->pb) < end - 1 && + !s->pb->eof_reached ) { uint8_t val = avio_r8(s->pb); *b++ = val ? val : avio_r8(s->pb); }