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BUG: KASAN: user-memory-access in instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
BUG: KASAN: user-memory-access in atomic_dec_return include/linux/atomic/atomic-instrumented.h:251 [inline]
BUG: KASAN: user-memory-access in dst_release+0x1f/0xe0 net/core/dst.c:172
Write of size 4 at addr 000000010000003f by task kworker/u4:3/158

CPU: 0 PID: 158 Comm: kworker/u4:3 Not tainted 5.15.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
Call Trace:
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106
 __kasan_report mm/kasan/report.c:446 [inline]
 kasan_report+0x190/0x1f0 mm/kasan/report.c:459
 kasan_check_range+0x2b5/0x2f0 mm/kasan/generic.c:189
 instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
 atomic_dec_return include/linux/atomic/atomic-instrumented.h:251 [inline]
 dst_release+0x1f/0xe0 net/core/dst.c:172
 dst_cache_destroy+0x107/0x1e0 net/core/dst_cache.c:160
 ip_tunnel_dev_free+0x21/0x50 net/ipv4/ip_tunnel.c:1011
 netdev_run_todo+0xaa0/0xcf0 net/core/dev.c:10593
 ip_tunnel_delete_nets+0x32a/0x370 net/ipv4/ip_tunnel.c:1124
 ops_exit_list net/core/net_namespace.c:171 [inline]
 cleanup_net+0x7ec/0xc50 net/core/net_namespace.c:591
 process_one_work+0x853/0x1140 kernel/workqueue.c:2297
 worker_thread+0xac1/0x1320 kernel/workqueue.c:2444
 kthread+0x453/0x480 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30
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