dst_alloc+0x2d5/0x360 net/core/dst.c:96
 rt_dst_alloc net/ipv4/route.c:1633 [inline]
 ip_route_input_slow net/ipv4/route.c:2369 [inline]
 ip_route_input_rcu+0x3fd4/0x4f70 net/ipv4/route.c:2483
 ip_route_input_noref+0x7c/0xd0 net/ipv4/route.c:2494
 ip_rcv_finish_core+0x68d/0x1e90 net/ipv4/ip_input.c:365
=====================================================
BUG: KMSAN: uninit-value in stack_trace_print+0xf9/0x110 kernel/stacktrace.c:33
 stack_trace_print+0xf9/0x110 kernel/stacktrace.c:33
 stack_depot_print+0x55/0x60 lib/stackdepot.c:351
 ref_tracker_dir_print+0x15c/0x2b0 lib/ref_tracker.c:57
 netdev_wait_allrefs_any net/core/dev.c:10291 [inline]
 netdev_run_todo+0x1122/0x1900 net/core/dev.c:10364
 rtnl_unlock+0x13/0x20 net/core/rtnetlink.c:147
 default_device_exit_batch+0xb55/0xc20 net/core/dev.c:11357
 ops_exit_list net/core/net_namespace.c:168 [inline]
 cleanup_net+0xdea/0x18c0 net/core/net_namespace.c:595
 process_one_work+0xb27/0x13e0 kernel/workqueue.c:2289
 worker_thread+0x1076/0x1d60 kernel/workqueue.c:2436
 kthread+0x31b/0x430 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30

Local variable pflags created at:
 get_current arch/x86/include/asm/current.h:15 [inline]
 mem_cgroup_handle_over_high+0x3e/0x650 mm/memcontrol.c:2499
 resume_user_mode_work include/linux/resume_user_mode.h:58 [inline]
 exit_to_user_mode_loop+0x193/0x320 kernel/entry/common.c:171

CPU: 0 PID: 7519 Comm: kworker/u4:9 Not tainted 6.0.0-rc5-syzkaller-48543-g968c2729e576 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Workqueue: netns cleanup_net
=====================================================