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BUG: KCSAN: data-race in yama_ptracer_del / yama_relation_cleanup

write to 0xffff8880aa941710 of 1 bytes by interrupt on cpu 0:
 yama_ptracer_del+0x117/0x1a0 security/yama/yama_lsm.c:191
 yama_task_free+0x1e/0x30 security/yama/yama_lsm.c:207
 security_task_free+0x3f/0xa0 security/security.c:1550
 __put_task_struct+0xc3/0x350 kernel/fork.c:751
 put_task_struct include/linux/sched/task.h:122 [inline]
 delayed_put_task_struct+0x19b/0x1c0 kernel/exit.c:182
 rcu_do_batch kernel/rcu/tree.c:2218 [inline]
 rcu_core+0x533/0x9f0 kernel/rcu/tree.c:2445
 rcu_core_si+0x12/0x20 kernel/rcu/tree.c:2454
 __do_softirq+0x118/0x34a kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0xb5/0xd0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:546 [inline]
 smp_apic_timer_interrupt+0xe2/0x270 arch/x86/kernel/apic/apic.c:1146
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 __read_once_size include/linux/compiler.h:232 [inline]
 __sanitizer_cov_trace_pc+0x37/0x50 kernel/kcov.c:192
 tomoyo_domain_quota_is_ok+0x223/0x2b0 security/tomoyo/util.c:1071
 tomoyo_supervisor+0x1d9/0xc90 security/tomoyo/common.c:2089
 tomoyo_audit_path_number_log security/tomoyo/file.c:235 [inline]
 tomoyo_path_number_perm+0x2d7/0x360 security/tomoyo/file.c:734
 tomoyo_path_mknod+0xde/0x140 security/tomoyo/tomoyo.c:246
 security_path_mknod+0xbc/0xf0 security/security.c:1053
 may_o_create fs/namei.c:3101 [inline]
 lookup_open fs/namei.c:3262 [inline]
 do_last fs/namei.c:3401 [inline]
 path_openat+0x18e5/0x2f70 fs/namei.c:3607
 do_filp_open+0x11e/0x1b0 fs/namei.c:3637
 do_sys_openat2+0x4f5/0x620 fs/open.c:1149
 do_sys_open+0xa2/0x110 fs/open.c:1165
 __do_sys_openat fs/open.c:1179 [inline]
 __se_sys_openat fs/open.c:1174 [inline]
 __x64_sys_openat+0x5d/0x70 fs/open.c:1174
 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff8880aa941710 of 1 bytes by task 8140 on cpu 1:
 yama_relation_cleanup+0xbb/0x1b0 security/yama/yama_lsm.c:122
 process_one_work+0x424/0x930 kernel/workqueue.c:2264
 worker_thread+0x9a/0x7e0 kernel/workqueue.c:2410
 kthread+0x1cb/0x1f0 kernel/kthread.c:255
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 8140 Comm: kworker/1:5 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events yama_relation_cleanup
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