================================================================== BUG: KCSAN: data-race in iomap_dio_bio_actor / iomap_dio_bio_end_io read to 0xffff88809b253924 of 4 bytes by interrupt on cpu 1: iomap_dio_bio_end_io+0x4c/0x2b0 fs/iomap/direct-io.c:149 bio_endio+0x2fa/0x400 block/bio.c:1821 req_bio_endio block/blk-core.c:245 [inline] blk_update_request+0x427/0x7b0 block/blk-core.c:1464 scsi_end_request+0x6b/0x360 drivers/scsi/scsi_lib.c:576 scsi_io_completion+0x11d/0xc80 drivers/scsi/scsi_lib.c:960 scsi_finish_command+0x283/0x380 drivers/scsi/scsi.c:228 scsi_softirq_done+0x259/0x280 drivers/scsi/scsi_lib.c:1476 blk_done_softirq+0x1eb/0x250 block/blk-softirq.c:37 __do_softirq+0x115/0x33f kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082 do_softirq.part.0+0x6b/0x80 kernel/softirq.c:337 do_softirq kernel/softirq.c:329 [inline] __local_bh_enable_ip+0x76/0x80 kernel/softirq.c:189 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline] _raw_spin_unlock_bh+0x3f/0x50 kernel/locking/spinlock.c:207 spin_unlock_bh include/linux/spinlock.h:383 [inline] br_port_carrier_check+0x191/0x250 net/bridge/br_if.c:89 br_device_event+0x241/0x570 net/bridge/br.c:86 notifier_call_chain+0xd7/0x160 kernel/notifier.c:83 __raw_notifier_call_chain kernel/notifier.c:361 [inline] raw_notifier_call_chain+0x37/0x50 kernel/notifier.c:368 call_netdevice_notifiers_info net/core/dev.c:1893 [inline] call_netdevice_notifiers_info+0x9a/0x120 net/core/dev.c:1878 netdev_state_change net/core/dev.c:1378 [inline] netdev_state_change+0xb2/0xd0 net/core/dev.c:1371 linkwatch_do_dev+0xd8/0xf0 net/core/link_watch.c:159 __linkwatch_run_queue+0x1a9/0x510 net/core/link_watch.c:204 linkwatch_event+0x54/0x70 net/core/link_watch.c:243 process_one_work+0x3d4/0x890 kernel/workqueue.c:2264 worker_thread+0xa0/0x800 kernel/workqueue.c:2410 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352 write to 0xffff88809b253924 of 4 bytes by task 13968 on cpu 0: iomap_dio_bio_actor+0x6dc/0x960 fs/iomap/direct-io.c:293 iomap_dio_actor+0x87/0x3a0 fs/iomap/direct-io.c:382 iomap_apply+0x20d/0x6a0 fs/iomap/apply.c:80 iomap_dio_rw+0x67e/0x9a0 fs/iomap/direct-io.c:498 ext4_dio_write_iter fs/ext4/file.c:438 [inline] ext4_file_write_iter+0xc38/0xd40 fs/ext4/file.c:545 call_write_iter include/linux/fs.h:1902 [inline] new_sync_write+0x388/0x4a0 fs/read_write.c:483 __vfs_write+0xb1/0xc0 fs/read_write.c:496 vfs_write fs/read_write.c:558 [inline] vfs_write+0x18a/0x390 fs/read_write.c:542 ksys_write+0xd5/0x1b0 fs/read_write.c:611 __do_sys_write fs/read_write.c:623 [inline] __se_sys_write fs/read_write.c:620 [inline] __x64_sys_write+0x4c/0x60 fs/read_write.c:620 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: 0 PID: 13968 Comm: syz-executor.5 Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================