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charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: kbowling X-Git-Repository: src X-Git-Refname: refs/heads/stable/15 X-Git-Reftype: branch X-Git-Commit: 6b4a887448d723dc3ad8af46642e52ac21febc29 Auto-Submitted: auto-generated Date: Fri, 30 Oct 2026 17:59:31 +0000 Message-Id: <6ae4db03.42956.739adaa2@gitrepo.freebsd.org> The branch stable/15 has been updated by kbowling: URL: https://cgit.FreeBSD.org/src/commit/?id=6b4a887448d723dc3ad8af46642e52ac21febc29 commit 6b4a887448d723dc3ad8af46642e52ac21febc29 Author: Gleb Smirnoff AuthorDate: 2026-05-20 14:27:52 +0000 Commit: Kevin Bowling CommitDate: 2026-10-30 17:56:36 +0000 netlink: fix unsigned overflow on a truncated message PR: 295106 Submitted by: Robert Morris Reviewed by: pouria, melifaro Differential Revision: https://reviews.freebsd.org/D56916 (cherry picked from commit e924a2c80b9e1ace68d8ca0ffdacec65feec90a3) --- sys/netlink/netlink_message_parser.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/sys/netlink/netlink_message_parser.h b/sys/netlink/netlink_message_parser.h index 720317ed74f3..b92dbcfb735c 100644 --- a/sys/netlink/netlink_message_parser.h +++ b/sys/netlink/netlink_message_parser.h @@ -328,6 +328,12 @@ static inline void nl_get_attrs_bmask_nlmsg(struct nlmsghdr *hdr, const struct nlhdr_parser *parser, struct nlattr_bmask *bm) { + if (__predict_false(hdr->nlmsg_len - sizeof(struct nlmsghdr) < + parser->nl_hdr_off)) { + /* Doesn't make sense to call nl_alloc_compat_hdr() here. */ + BIT_ZERO(NL_ATTR_BMASK_SIZE, bm); + return; + } nl_get_attrs_bmask_raw( (struct nlattr *)((char *)(hdr + 1) + parser->nl_hdr_off), hdr->nlmsg_len - sizeof(*hdr) - parser->nl_hdr_off, bm);