5d49283f88
tagname2tag() hashes the tag name before truncating it to 63 characters. tag_unref() removes the tag from the name hash by computing the hash over the truncated name. Ensure that both operations compute the same hash for a given tag. The larger issue is a lack of string validation in pf(4) ioctl handlers. This is intended to be fixed with some future work, but an extra safety belt in tagname2hashindex() is worthwhile regardless. Reported by: syzbot+a0988828aafb00de7d68@syzkaller.appspotmail.com Reviewed by: kp MFC after: 1 week Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D27346 |
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