From 159258afb50ad57f7ed27fe86ded83a7b3a26f90 Mon Sep 17 00:00:00 2001 From: Kristof Provost Date: Sat, 21 Aug 2021 13:42:27 +0200 Subject: [PATCH] altq: Fix panics on rmc_restart() rmc_restart() is called from a timer, but can trigger traffic. This means the curvnet context will not be set. Use the vnet associated with the interface we're currently processing to set it. We also have to enter net_epoch here, for the same reason. Reviewed by: mjg MFC after: 1 week Sponsored by: Rubicon Communications, LLC ("Netgate") Differential Revision: https://reviews.freebsd.org/D31642 --- sys/net/altq/altq_rmclass.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/sys/net/altq/altq_rmclass.c b/sys/net/altq/altq_rmclass.c index a6ede6feebe2..a9af314cd48a 100644 --- a/sys/net/altq/altq_rmclass.c +++ b/sys/net/altq/altq_rmclass.c @@ -1554,10 +1554,13 @@ rmc_restart(void *arg) { struct rm_class *cl = arg; struct rm_ifdat *ifd = cl->ifdat_; + struct epoch_tracker et; int s; s = splnet(); + NET_EPOCH_ENTER(et); IFQ_LOCK(ifd->ifq_); + CURVNET_SET(ifd->ifq_->altq_ifp->if_vnet); if (cl->sleeping_) { cl->sleeping_ = 0; cl->undertime_.tv_sec = 0; @@ -1567,7 +1570,9 @@ rmc_restart(void *arg) (ifd->restart)(ifd->ifq_); } } + CURVNET_RESTORE(); IFQ_UNLOCK(ifd->ifq_); + NET_EPOCH_EXIT(et); splx(s); }