================================================================== BUG: KCSAN: data-race in nilfs_detach_log_writer / nilfs_segctor_thread write to 0xffff88801567bbe8 of 8 bytes by task 19739 on cpu 1: nilfs_segctor_thread+0x6b1/0x710 fs/nilfs2/segment.c:2606 kthread+0x20b/0x230 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 read to 0xffff88801567bbe8 of 8 bytes by task 8396 on cpu 0: nilfs_segctor_kill_thread fs/nilfs2/segment.c:2636 [inline] nilfs_segctor_destroy fs/nilfs2/segment.c:2718 [inline] nilfs_detach_log_writer+0x191/0x5a0 fs/nilfs2/segment.c:2807 nilfs_put_super+0x2f/0xf0 fs/nilfs2/super.c:467 generic_shutdown_super+0xde/0x210 fs/super.c:464 kill_block_super+0x4a/0x90 fs/super.c:1394 deactivate_locked_super+0x6a/0xb0 fs/super.c:335 deactivate_super+0x85/0x90 fs/super.c:366 cleanup_mnt+0x277/0x2e0 fs/namespace.c:1136 __cleanup_mnt+0x15/0x20 fs/namespace.c:1143 task_work_run+0x8e/0x110 kernel/task_work.c:140 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x17c/0x1b0 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:301 do_syscall_64+0x45/0x80 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xae Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 8396 Comm: syz-executor.0 Not tainted 5.12.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================