Date: Thu, 30 Oct 2025 14:14:55 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: 879808d2e5da - stable/15 - altq: Clear stats structures in get_class_stats() Message-ID: <202510301414.59UEEtVo096759@gitrepo.freebsd.org>
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The branch stable/15 has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=879808d2e5da680797b656dfc7d3457154c9478b commit 879808d2e5da680797b656dfc7d3457154c9478b Author: Mark Johnston <markj@FreeBSD.org> AuthorDate: 2025-10-27 16:27:40 +0000 Commit: Mark Johnston <markj@FreeBSD.org> CommitDate: 2025-10-30 14:14:45 +0000 altq: Clear stats structures in get_class_stats() These structures are copied out to userspace, and it's possible to leak uninitialized stack bytes since these routines and their callers weren't careful to clear them first. Add memsets to avoid this. Reported by: Ilja Van Sprundel <ivansprundel@ioactive.com> Reviewed by: kp, emaste MFC after: 3 days Differential Revision: https://reviews.freebsd.org/D53342 (cherry picked from commit ff08916e9ac689e6ce734de72325fc2bd9495a35) --- sys/net/altq/altq_cbq.c | 2 ++ sys/net/altq/altq_fairq.c | 2 ++ sys/net/altq/altq_priq.c | 2 ++ 3 files changed, 6 insertions(+) diff --git a/sys/net/altq/altq_cbq.c b/sys/net/altq/altq_cbq.c index fdf39690160b..2333b9ea8678 100644 --- a/sys/net/altq/altq_cbq.c +++ b/sys/net/altq/altq_cbq.c @@ -173,6 +173,8 @@ cbq_request(struct ifaltq *ifq, int req, void *arg) static void get_class_stats(class_stats_t *statsp, struct rm_class *cl) { + memset(statsp, 0, sizeof(*statsp)); + statsp->xmit_cnt = cl->stats_.xmit_cnt; statsp->drop_cnt = cl->stats_.drop_cnt; statsp->over = cl->stats_.over; diff --git a/sys/net/altq/altq_fairq.c b/sys/net/altq/altq_fairq.c index 6069865101a0..0a00168e547e 100644 --- a/sys/net/altq/altq_fairq.c +++ b/sys/net/altq/altq_fairq.c @@ -857,6 +857,8 @@ get_class_stats(struct fairq_classstats *sp, struct fairq_class *cl) { fairq_bucket_t *b; + memset(sp, 0, sizeof(*sp)); + sp->class_handle = cl->cl_handle; sp->qlimit = cl->cl_qlimit; sp->xmit_cnt = cl->cl_xmitcnt; diff --git a/sys/net/altq/altq_priq.c b/sys/net/altq/altq_priq.c index 026346639b2e..fec488418546 100644 --- a/sys/net/altq/altq_priq.c +++ b/sys/net/altq/altq_priq.c @@ -597,6 +597,8 @@ priq_purgeq(struct priq_class *cl) static void get_class_stats(struct priq_classstats *sp, struct priq_class *cl) { + memset(sp, 0, sizeof(*sp)); + sp->class_handle = cl->cl_handle; sp->qlength = qlen(cl->cl_q); sp->qlimit = qlimit(cl->cl_q);home | help
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