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commit 9a4e0f6cb8bce390f093c47c81f52a1dccd5d657 Author: Kacper Michajłow <[email protected]> AuthorDate: Tue Jun 25 23:50:30 2024 +0200 Commit: Michael Niedermayer <[email protected]> CommitDate: Sat Jun 20 17:42:28 2026 +0200 avformat/nuv: return early if header id fails to read Fixes use of uninitialized value in memcmp below, reported by MSAN. Found by OSS-Fuzz. Signed-off-by: Kacper Michajłow <[email protected]> Signed-off-by: Michael Niedermayer <[email protected]> (cherry picked from commit 02b3fc582693477555ce151515972bfee04367a9) Signed-off-by: Michael Niedermayer <[email protected]> --- libavformat/nuv.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/libavformat/nuv.c b/libavformat/nuv.c index 12c6c691ee..4cd745f6d9 100644 --- a/libavformat/nuv.c +++ b/libavformat/nuv.c @@ -165,7 +165,9 @@ static int nuv_header(AVFormatContext *s) int is_mythtv, width, height, v_packs, a_packs, ret; AVStream *vst = NULL, *ast = NULL; - avio_read(pb, id_string, 12); + if ((ret = ffio_read_size(pb, id_string, 12)) < 0) + return ret; + is_mythtv = !memcmp(id_string, "MythTVVideo", 12); avio_skip(pb, 5); // version string avio_skip(pb, 3); // padding _______________________________________________ ffmpeg-cvslog mailing list -- [email protected] To unsubscribe send an email to [email protected]
