================================================================== BUG: KCSAN: data-race in yama_ptracer_del / yama_ptracer_del write to 0xffff8880b7c047d0 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:1550 __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_do_batch kernel/rcu/tree.c:2206 [inline] rcu_core+0x533/0x9f0 kernel/rcu/tree.c:2433 rcu_core_si+0x12/0x20 kernel/rcu/tree.c:2442 __do_softirq+0x115/0x33f kernel/softirq.c:292 run_ksoftirqd+0x46/0x60 kernel/softirq.c:603 smpboot_thread_fn+0x37d/0x4a0 kernel/smpboot.c:165 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352 read to 0xffff8880b7c047d0 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:1550 __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_do_batch kernel/rcu/tree.c:2206 [inline] rcu_core+0x533/0x9f0 kernel/rcu/tree.c:2433 rcu_core_si+0x12/0x20 kernel/rcu/tree.c:2442 __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:546 [inline] smp_apic_timer_interrupt+0xe6/0x280 arch/x86/kernel/apic/apic.c:1146 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 arch_local_irq_restore arch/x86/include/asm/paravirt.h:752 [inline] kcsan_setup_watchpoint+0x22c/0x3e0 kernel/kcsan/core.c:527 check_access kernel/kcsan/core.c:564 [inline] __tsan_read8+0xc6/0x100 kernel/kcsan/core.c:700 tomoyo_check_path_acl security/tomoyo/file.c:260 [inline] tomoyo_check_path_acl+0x77/0xa0 security/tomoyo/file.c:252 tomoyo_check_acl+0xf6/0x270 security/tomoyo/domain.c:175 tomoyo_path_permission security/tomoyo/file.c:586 [inline] tomoyo_path_permission+0xe3/0x160 security/tomoyo/file.c:573 tomoyo_path_perm+0x23e/0x390 security/tomoyo/file.c:838 tomoyo_inode_getattr+0x26/0x40 security/tomoyo/tomoyo.c:129 security_inode_getattr+0x9b/0xd0 security/security.c:1254 vfs_getattr+0x2e/0x70 fs/stat.c:117 vfs_statx+0x108/0x190 fs/stat.c:201 vfs_lstat include/linux/fs.h:3276 [inline] __do_sys_newlstat+0x51/0xb0 fs/stat.c:364 __se_sys_newlstat fs/stat.c:358 [inline] __x64_sys_newlstat+0x3a/0x50 fs/stat.c:358 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 2742 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 ==================================================================