==================================================================
BUG: KASAN: null-ptr-deref in atomic_read include/asm-generic/atomic-instrumented.h:26 [inline]
BUG: KASAN: null-ptr-deref in __tcf_idr_release net/sched/act_api.c:162 [inline]
BUG: KASAN: null-ptr-deref in tcf_idrinfo_destroy+0xe2/0x280 net/sched/act_api.c:541
Read of size 4 at addr 0000000000000010 by task kworker/u4:5/683

CPU: 1 PID: 683 Comm: kworker/u4:5 Not tainted 5.4.274-syzkaller-00003-g51e9abf68baf #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Workqueue: netns cleanup_net
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d8/0x241 lib/dump_stack.c:118
 __kasan_report+0xe9/0x120 mm/kasan/report.c:520
 kasan_report+0x30/0x60 mm/kasan/common.c:653
 check_memory_region_inline mm/kasan/generic.c:141 [inline]
 check_memory_region+0x272/0x280 mm/kasan/generic.c:191
 atomic_read include/asm-generic/atomic-instrumented.h:26 [inline]
 __tcf_idr_release net/sched/act_api.c:162 [inline]
 tcf_idrinfo_destroy+0xe2/0x280 net/sched/act_api.c:541
 tc_action_net_exit include/net/act_api.h:145 [inline]
 police_exit_net+0xd7/0x140 net/sched/act_police.c:410
 ops_exit_list net/core/net_namespace.c:184 [inline]
 cleanup_net+0x6e2/0xc90 net/core/net_namespace.c:609
 process_one_work+0x765/0xd20 kernel/workqueue.c:2290
 worker_thread+0xaef/0x1470 kernel/workqueue.c:2436
 kthread+0x2da/0x360 kernel/kthread.c:288