Date: Tue, 4 Nov 2025 13:24:53 GMT From: Mark Johnston <markj@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 763f18140d37 - stable/14 - net: Validate interface group names in ioctl handlers Message-ID: <202511041324.5A4DOrO5071782@gitrepo.freebsd.org>
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The branch stable/14 has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=763f18140d37d848aa6647e88f36dc468207c41d commit 763f18140d37d848aa6647e88f36dc468207c41d Author: Mark Johnston <markj@FreeBSD.org> AuthorDate: 2025-10-27 16:27:13 +0000 Commit: Mark Johnston <markj@FreeBSD.org> CommitDate: 2025-11-04 13:24:42 +0000 net: Validate interface group names in ioctl handlers The handlers were not checking that the group names are nul-terminated. Add checks for this. Reported by: Ilja Van Sprundel <ivansprundel@ioactive.com> Reviewed by: zlei MFC after: 3 days Differential Revision: https://reviews.freebsd.org/D53344 (cherry picked from commit 32919a34f17ac1af99dec7376f22a8393c251602) --- sys/net/if.c | 34 ++++++++++++++++++++++++++-------- 1 file changed, 26 insertions(+), 8 deletions(-) diff --git a/sys/net/if.c b/sys/net/if.c index 607bcdd2aa80..0c7e32e858bc 100644 --- a/sys/net/if.c +++ b/sys/net/if.c @@ -2850,15 +2850,20 @@ ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td) break; case SIOCAIFGROUP: + { + const char *groupname; + error = priv_check(td, PRIV_NET_ADDIFGROUP); if (error) return (error); - error = if_addgroup(ifp, - ((struct ifgroupreq *)data)->ifgr_group); + groupname = ((struct ifgroupreq *)data)->ifgr_group; + if (strnlen(groupname, IFNAMSIZ) == IFNAMSIZ) + return (EINVAL); + error = if_addgroup(ifp, groupname); if (error != 0) return (error); break; - + } case SIOCGIFGROUP: { struct epoch_tracker et; @@ -2870,15 +2875,20 @@ ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td) } case SIOCDIFGROUP: + { + const char *groupname; + error = priv_check(td, PRIV_NET_DELIFGROUP); if (error) return (error); - error = if_delgroup(ifp, - ((struct ifgroupreq *)data)->ifgr_group); + groupname = ((struct ifgroupreq *)data)->ifgr_group; + if (strnlen(groupname, IFNAMSIZ) == IFNAMSIZ) + return (EINVAL); + error = if_delgroup(ifp, groupname); if (error != 0) return (error); break; - + } default: error = ENOIOCTL; break; @@ -3022,9 +3032,17 @@ ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td) goto out_noref; case SIOCGIFGMEMB: - error = if_getgroupmembers((struct ifgroupreq *)data); - goto out_noref; + { + struct ifgroupreq *req; + req = (struct ifgroupreq *)data; + if (strnlen(req->ifgr_name, IFNAMSIZ) == IFNAMSIZ) { + error = EINVAL; + goto out_noref; + } + error = if_getgroupmembers(req); + goto out_noref; + } #if defined(INET) || defined(INET6) case SIOCSVH: case SIOCGVH:help
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