================================================================== BUG: KCSAN: data-race in wb_timer_fn / wbt_track write to 0xffff888103912c04 of 4 bytes by interrupt on cpu 0: calc_wb_limits block/blk-wbt.c:304 [inline] scale_up block/blk-wbt.c:313 [inline] wb_timer_fn+0x403/0xa00 block/blk-wbt.c:382 blk_stat_timer_fn+0x3f4/0x410 block/blk-stat.c:99 call_timer_fn+0x2e/0x240 kernel/time/timer.c:1415 expire_timers+0x116/0x260 kernel/time/timer.c:1460 __run_timers+0x328/0x3c0 kernel/time/timer.c:1752 run_timer_softirq+0x19/0x30 kernel/time/timer.c:1765 __do_softirq+0x12c/0x2b1 kernel/softirq.c:298 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x32/0x40 arch/x86/kernel/irq_64.c:77 do_softirq kernel/softirq.c:343 [inline] __local_bh_enable_ip+0xba/0xd0 kernel/softirq.c:195 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline] _raw_spin_unlock_bh+0x33/0x40 kernel/locking/spinlock.c:207 spin_unlock_bh include/linux/spinlock.h:399 [inline] netif_addr_unlock_bh include/linux/netdevice.h:4337 [inline] dev_uc_del+0x1e4/0x200 net/core/dev_addr_lists.c:615 macsec_dev_stop+0x27e/0x2b0 drivers/net/macsec.c:3568 __dev_close_many+0x1f6/0x2b0 net/core/dev.c:1607 dev_close_many+0x114/0x310 net/core/dev.c:1632 rollback_registered_many+0x252/0xe40 net/core/dev.c:9399 unregister_netdevice_many net/core/dev.c:10626 [inline] default_device_exit_batch+0x250/0x3d0 net/core/dev.c:11109 ops_exit_list net/core/net_namespace.c:190 [inline] cleanup_net+0x4cc/0x8a0 net/core/net_namespace.c:604 process_one_work+0x3e1/0x950 kernel/workqueue.c:2272 worker_thread+0x635/0xb90 kernel/workqueue.c:2418 kthread+0x1fa/0x220 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 read to 0xffff888103912c04 of 4 bytes by task 8105 on cpu 1: rwb_enabled block/blk-wbt.c:80 [inline] bio_to_wbt_flags block/blk-wbt.c:543 [inline] wbt_track+0x23/0x130 block/blk-wbt.c:592 __rq_qos_track+0x50/0x90 block/blk-rq-qos.c:81 rq_qos_track block/blk-rq-qos.h:189 [inline] blk_mq_submit_bio+0x2c0/0x1020 block/blk-mq.c:2187 __submit_bio_noacct_mq block/blk-core.c:1026 [inline] submit_bio_noacct+0x77d/0x930 block/blk-core.c:1059 submit_bio+0x1f3/0x360 block/blk-core.c:1129 ext4_io_submit+0xcd/0xf0 fs/ext4/page-io.c:382 ext4_writepages+0x68c/0x1e10 fs/ext4/inode.c:2748 do_writepages+0x7b/0x150 mm/page-writeback.c:2352 __filemap_fdatawrite_range+0x19d/0x1d0 mm/filemap.c:422 file_write_and_wait_range+0x9f/0x120 mm/filemap.c:761 ext4_sync_file+0xf4/0x6a0 fs/ext4/fsync.c:151 vfs_fsync_range+0x107/0x120 fs/sync.c:200 generic_write_sync include/linux/fs.h:2723 [inline] ext4_buffered_write_iter+0x384/0x3d0 fs/ext4/file.c:278 ext4_file_write_iter+0x45e/0x1090 fs/ext4/file.c:503 call_write_iter include/linux/fs.h:1887 [inline] new_sync_write fs/read_write.c:518 [inline] vfs_write+0x617/0x690 fs/read_write.c:605 ksys_write+0xce/0x180 fs/read_write.c:658 __do_sys_write fs/read_write.c:670 [inline] __se_sys_write fs/read_write.c:667 [inline] __x64_sys_write+0x3e/0x50 fs/read_write.c:667 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 8105 Comm: rs:main Q:Reg Not tainted 5.10.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================