================================================================== BUG: KCSAN: data-race in yama_relation_cleanup / yama_task_free write to 0xffff88802cde2a10 of 1 bytes by interrupt on cpu 0: yama_ptracer_del security/yama/yama_lsm.c:191 [inline] yama_task_free+0xc6/0x150 security/yama/yama_lsm.c:207 security_task_free+0x3f/0xa0 security/security.c:1595 __put_task_struct+0x96/0x370 kernel/fork.c:750 put_task_struct include/linux/sched/task.h:126 [inline] delayed_put_task_struct+0x52/0x160 kernel/exit.c:172 rcu_do_batch kernel/rcu/tree.c:2414 [inline] rcu_core+0x576/0xac0 kernel/rcu/tree.c:2641 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2650 __do_softirq+0x198/0x360 kernel/softirq.c:292 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] do_softirq_own_stack+0x5d/0x80 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:387 [inline] __irq_exit_rcu+0x115/0x120 kernel/softirq.c:417 sysvec_apic_timer_interrupt+0xba/0xd0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:585 native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60 arch_safe_halt arch/x86/include/asm/paravirt.h:150 [inline] acpi_safe_halt drivers/acpi/processor_idle.c:111 [inline] acpi_idle_do_entry drivers/acpi/processor_idle.c:525 [inline] acpi_idle_enter+0x2ff/0x680 drivers/acpi/processor_idle.c:651 cpuidle_enter_state+0x245/0x5d0 drivers/cpuidle/cpuidle.c:235 cpuidle_enter+0x3c/0x60 drivers/cpuidle/cpuidle.c:346 call_cpuidle kernel/sched/idle.c:126 [inline] cpuidle_idle_call kernel/sched/idle.c:214 [inline] do_idle+0x229/0x310 kernel/sched/idle.c:276 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:372 rest_init+0xd8/0xe0 init/main.c:705 arch_call_rest_init+0xa/0xb start_kernel+0x608/0x6d0 init/main.c:1043 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 read to 0xffff88802cde2a10 of 1 bytes by task 5051 on cpu 1: yama_relation_cleanup+0x5d/0x150 security/yama/yama_lsm.c:122 process_one_work+0x3e1/0x9a0 kernel/workqueue.c:2269 worker_thread+0x665/0xbe0 kernel/workqueue.c:2415 kthread+0x20d/0x230 kernel/kthread.c:291 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 5051 Comm: kworker/1:3 Not tainted 5.8.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events yama_relation_cleanup ==================================================================