Re: [PATCH v2 net-next 0/7] netfilter: updates for net-next

[Florian Westphal <fw@strlen.de>]

Jakub Kicinski <kuba@kernel.org> wrote:
> On Thu, 29 Jan 2026 11:54:20 +0100 Florian Westphal wrote:
> > v2: discard buggy nfqueue patch, no other changes.
> > 
> > The following patchset contains Netfilter updates for *net-next*:
> > 
> > Patches 1 to 4 add IP6IP6 tunneling acceleration to the flowtable
> > infrastructure.  Patch 5 extends test coverage for this.
> > From Lorenzo Bianconi.
> > 
> > Patch 6 removes a duplicated helper from xt_time extension, we can
> > use an existing helper for this, from Jinjie Ruan.
> > 
> > Patch 7 adds an rhashtable to nfnetink_queue to speed up out-of-order
> > verdict processing.  Before this list walk was required due to in-order
> > design assumption.
> 
> Hi Florian, some more KASAN today:
> 
> https://netdev-ctrl.bots.linux.dev/logs/vmksft/nf-dbg/results/496421/vm-crash-thr0-0

> [ 1144.170509][   T12] ==================================================================
> [ 1144.170759][   T12] BUG: KASAN: slab-use-after-free in idr_for_each+0x1c1/0x1f0
> [ 1144.170922][   T12] Read of size 8 at addr ff11000012a16a70 by task kworker/u16:0/12
> [ 1144.171079][   T12] 
> [ 1144.171133][   T12] CPU: 1 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.19.0-rc7-virtme #1 PREEMPT(full) 
> [ 1144.171137][   T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
> [ 1144.171139][   T12] Workqueue: netns cleanup_net
> [ 1144.171145][   T12] Call Trace:
> [ 1144.171147][   T12]  <TASK>
> [ 1144.171149][   T12]  dump_stack_lvl+0x6f/0xa0
> [ 1144.171154][   T12]  print_address_description.constprop.0+0x6e/0x300
> [ 1144.171159][   T12]  print_report+0xfc/0x1fb
> [ 1144.171161][   T12]  ? idr_for_each+0x1c1/0x1f0
> [ 1144.171163][   T12]  ? __virt_addr_valid+0x1da/0x430
> [ 1144.171167][   T12]  ? idr_for_each+0x1c1/0x1f0
> [ 1144.171168][   T12]  kasan_report+0xe8/0x120

Sigh.  Doesn't ring a bell, I will have a look.