================================================================== BUG: KCSAN: data-race in yama_ptracer_del / yama_ptracer_del write to 0xffff8880ba55eb10 of 1 bytes by interrupt on cpu 0: yama_ptracer_del+0x119/0x1a0 security/yama/yama_lsm.c:191 yama_task_free+0x22/0x30 security/yama/yama_lsm.c:207 security_task_free+0x43/0xa0 security/security.c:1518 __put_task_struct+0xcd/0x360 kernel/fork.c:745 put_task_struct include/linux/sched/task.h:122 [inline] delayed_put_task_struct+0x1a5/0x1d0 kernel/exit.c:182 __rcu_reclaim kernel/rcu/rcu.h:222 [inline] rcu_do_batch+0x256/0x5b0 kernel/rcu/tree.c:2183 rcu_core+0x365/0x4c0 kernel/rcu/tree.c:2408 rcu_core_si+0x12/0x20 kernel/rcu/tree.c:2417 __do_softirq+0x115/0x33f kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0xbb/0xe0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0xe6/0x280 arch/x86/kernel/apic/apic.c:1137 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 tomoyo_domain_quota_is_ok+0x242/0x2b0 security/tomoyo/util.c:1070 tomoyo_supervisor+0x22b/0xd20 security/tomoyo/common.c:2087 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline] tomoyo_path_permission security/tomoyo/file.c:587 [inline] tomoyo_path_permission+0x121/0x160 security/tomoyo/file.c:573 tomoyo_path_perm+0x23e/0x390 security/tomoyo/file.c:838 tomoyo_path_unlink+0x63/0x90 security/tomoyo/tomoyo.c:156 security_path_unlink+0xa3/0xd0 security/security.c:1044 do_unlinkat+0x2f1/0x530 fs/namei.c:4064 __do_sys_unlink fs/namei.c:4114 [inline] __se_sys_unlink fs/namei.c:4112 [inline] __x64_sys_unlink+0x3b/0x50 fs/namei.c:4112 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff8880ba55eb10 of 1 bytes by interrupt on cpu 1: yama_ptracer_del+0xd6/0x1a0 security/yama/yama_lsm.c:187 yama_task_free+0x22/0x30 security/yama/yama_lsm.c:207 security_task_free+0x43/0xa0 security/security.c:1518 __put_task_struct+0xcd/0x360 kernel/fork.c:745 put_task_struct include/linux/sched/task.h:122 [inline] delayed_put_task_struct+0x1a5/0x1d0 kernel/exit.c:182 __rcu_reclaim kernel/rcu/rcu.h:222 [inline] rcu_do_batch+0x256/0x5b0 kernel/rcu/tree.c:2183 rcu_core+0x365/0x4c0 kernel/rcu/tree.c:2408 rcu_core_si+0x12/0x20 kernel/rcu/tree.c:2417 __do_softirq+0x115/0x33f kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0xbb/0xe0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0xe6/0x280 arch/x86/kernel/apic/apic.c:1137 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 __sanitizer_cov_trace_pc+0x1/0x50 kernel/kcov.c:180 unmap_single_vma+0x144/0x200 mm/memory.c:1300 unmap_vmas+0xda/0x1a0 mm/memory.c:1332 exit_mmap+0x13e/0x300 mm/mmap.c:3140 __mmput kernel/fork.c:1082 [inline] mmput+0xea/0x280 kernel/fork.c:1103 exit_mm kernel/exit.c:485 [inline] do_exit+0x4ac/0x18c0 kernel/exit.c:784 do_group_exit+0xb4/0x1c0 kernel/exit.c:895 get_signal+0x2a2/0x1320 kernel/signal.c:2734 do_signal+0x2f/0x6c0 arch/x86/kernel/signal.c:815 exit_to_usermode_loop+0x250/0x2c0 arch/x86/entry/common.c:160 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline] syscall_return_slowpath arch/x86/entry/common.c:278 [inline] do_syscall_64+0x384/0x3a0 arch/x86/entry/common.c:304 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 16367 Comm: syz-executor.2 Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================