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BUG: KCSAN: data-race in l2tp_tunnel_del_work / sk_common_release

write to 0xffff88810f99b060 of 8 bytes by task 5178 on cpu 0:
 sk_set_socket include/net/sock.h:1977 [inline]
 sock_orphan include/net/sock.h:1996 [inline]
 sk_common_release+0xa6/0x210 net/core/sock.c:3757
 udp_lib_close+0x15/0x20 include/net/udp.h:199
 inet_release+0xce/0xf0 net/ipv4/af_inet.c:437
 inet6_release+0x3e/0x60 net/ipv6/af_inet6.c:489
 __sock_release net/socket.c:659 [inline]
 sock_close+0x68/0x150 net/socket.c:1421
 __fput+0x2c2/0x660 fs/file_table.c:422
 __fput_sync+0x44/0x60 fs/file_table.c:507
 __do_sys_close fs/open.c:1555 [inline]
 __se_sys_close+0x101/0x1b0 fs/open.c:1540
 __x64_sys_close+0x1f/0x30 fs/open.c:1540
 x64_sys_call+0x25f1/0x2d70 arch/x86/include/generated/asm/syscalls_64.h:4
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff88810f99b060 of 8 bytes by task 28 on cpu 1:
 l2tp_tunnel_del_work+0x3e/0x260 net/l2tp/l2tp_core.c:1287
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0x483/0x9a0 kernel/workqueue.c:3312
 worker_thread+0x526/0x730 kernel/workqueue.c:3393
 kthread+0x1d1/0x210 kernel/kthread.c:389
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

value changed: 0xffff888106b1fa80 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 28 Comm: kworker/u8:1 Not tainted 6.10.0-rc1-syzkaller-00104-gd8ec19857b09 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Workqueue: l2tp l2tp_tunnel_del_work
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