================================================================== BUG: KCSAN: data-race in __xa_set_mark / xas_find_marked read-write to 0xffff888105baafd8 of 8 bytes by task 14594 on cpu 1: instrument_read_write include/linux/instrumented.h:55 [inline] __instrument_read_write_bitop include/asm-generic/bitops/instrumented-non-atomic.h:84 [inline] ___test_and_set_bit include/asm-generic/bitops/instrumented-non-atomic.h:99 [inline] node_set_mark lib/xarray.c:95 [inline] xas_set_mark lib/xarray.c:893 [inline] __xa_set_mark+0xd2/0x1a0 lib/xarray.c:2082 ref_tracker_debugfs_mark lib/ref_tracker.c:56 [inline] ref_tracker_dir_exit+0x5e/0x360 lib/ref_tracker.c:231 free_netdev+0x325/0x4a0 net/core/dev.c:11977 netdev_run_todo+0x711/0x810 net/core/dev.c:11508 rtnl_unlock+0xe/0x20 net/core/rtnetlink.c:157 ops_exit_rtnl_list net/core/net_namespace.c:188 [inline] ops_undo_list+0x218/0x410 net/core/net_namespace.c:247 cleanup_net+0x2de/0x4d0 net/core/net_namespace.c:682 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0x4ce/0x9d0 kernel/workqueue.c:3319 worker_thread+0x582/0x770 kernel/workqueue.c:3400 kthread+0x486/0x510 kernel/kthread.c:463 ret_from_fork+0xda/0x150 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 read to 0xffff888105baafd8 of 8 bytes by task 9 on cpu 0: xas_find_chunk include/linux/xarray.h:1752 [inline] xas_find_marked+0x218/0x620 lib/xarray.c:1510 xa_find_after+0xc6/0x1e0 lib/xarray.c:2251 debugfs_reap_work+0x18c/0x1d0 lib/ref_tracker.c:511 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0x4ce/0x9d0 kernel/workqueue.c:3319 worker_thread+0x582/0x770 kernel/workqueue.c:3400 kthread+0x486/0x510 kernel/kthread.c:463 ret_from_fork+0xda/0x150 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 value changed: 0x000000002bac0a00 -> 0x000000002bec0a08 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Not tainted syzkaller #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Workqueue: events debugfs_reap_work ==================================================================