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BUG: KCSAN: data-race in yama_ptracer_del / yama_ptracer_del

write to 0xffff8880a7676110 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:2239 [inline]
 rcu_core+0x533/0x9f0 kernel/rcu/tree.c:2466
 rcu_core_si+0x12/0x20 kernel/rcu/tree.c:2475
 __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
 arch_local_irq_enable arch/x86/include/asm/paravirt.h:762 [inline]
 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline]
 _raw_spin_unlock_irq+0x4b/0x80 kernel/locking/spinlock.c:199
 task_work_run+0xcd/0x130 kernel/task_work.c:106
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x2ae/0x2c0 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:278 [inline]
 do_syscall_64+0x36e/0x390 arch/x86/entry/common.c:304
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff8880a7676110 of 1 bytes by interrupt on cpu 1:
 yama_ptracer_del+0xd4/0x1a0 security/yama/yama_lsm.c:187
 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:2239 [inline]
 rcu_core+0x533/0x9f0 kernel/rcu/tree.c:2466
 rcu_core_si+0x12/0x20 kernel/rcu/tree.c:2475
 __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
 get_page_from_freelist+0xe4/0x1640 mm/page_alloc.c:3612
 __alloc_pages_nodemask+0x15e/0x310 mm/page_alloc.c:4731
 alloc_pages_current+0xca/0x170 mm/mempolicy.c:2211
 alloc_pages include/linux/gfp.h:532 [inline]
 __pte_alloc_one include/asm-generic/pgalloc.h:63 [inline]
 pte_alloc_one+0x14/0x50 arch/x86/mm/pgtable.c:26
 __pte_alloc+0x27/0x210 mm/memory.c:426
 copy_pte_range mm/memory.c:816 [inline]
 copy_pmd_range mm/memory.c:892 [inline]
 copy_pud_range mm/memory.c:926 [inline]
 copy_p4d_range mm/memory.c:948 [inline]
 copy_page_range+0x1391/0x1a40 mm/memory.c:1010
 dup_mmap kernel/fork.c:610 [inline]
 dup_mm+0x72e/0xb90 kernel/fork.c:1366
 copy_mm kernel/fork.c:1422 [inline]
 copy_process+0x39ad/0x3b10 kernel/fork.c:2092
 _do_fork+0xf7/0x790 kernel/fork.c:2441
 __do_sys_clone kernel/fork.c:2596 [inline]
 __se_sys_clone kernel/fork.c:2577 [inline]
 __x64_sys_clone+0x12e/0x170 kernel/fork.c:2577
 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 7821 Comm: syz-executor.4 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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