==================================================================
BUG: KCSAN: data-race in lbmIODone / lbmRead

read-write to 0xffff888134ce7908 of 4 bytes by interrupt on cpu 0:
 lbmIODone+0x48/0xa70 fs/jfs/jfs_logmgr.c:2193
 bio_endio+0x285/0x350 block/bio.c:1450
 req_bio_endio block/blk-core.c:264 [inline]
 blk_update_request+0x4e5/0xb00 block/blk-core.c:1462
 blk_mq_end_request+0x22/0x50 block/blk-mq.c:564
 lo_complete_rq+0xca/0x180 drivers/block/loop.c:497
 blk_done_softirq+0x145/0x190 block/blk-mq.c:588
 __do_softirq+0x13c/0x2c3 kernel/softirq.c:343
 run_ksoftirqd+0x13/0x20 kernel/softirq.c:650
 smpboot_thread_fn+0x34f/0x520 kernel/smpboot.c:165
 kthread+0x1fd/0x220 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

read to 0xffff888134ce7908 of 4 bytes by task 8465 on cpu 1:
 lbmRead+0x245/0x320 fs/jfs/jfs_logmgr.c:2001
 lmLogShutdown+0x20f/0x330 fs/jfs/jfs_logmgr.c:1675
 lmLogClose+0x168/0x280 fs/jfs/jfs_logmgr.c:1467
 jfs_umount+0x191/0x1b0 fs/jfs/jfs_umount.c:116
 jfs_put_super+0x4c/0xb0 fs/jfs/super.c:194
 generic_shutdown_super+0xcd/0x1f0 fs/super.c:464
 kill_block_super+0x4a/0x90 fs/super.c:1393
 deactivate_locked_super+0x6a/0xb0 fs/super.c:335
 deactivate_super+0x85/0x90 fs/super.c:366
 cleanup_mnt+0x277/0x2e0 fs/namespace.c:1118
 __cleanup_mnt+0x15/0x20 fs/namespace.c:1125
 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+0x16b/0x1a0 kernel/entry/common.c:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:302
 do_syscall_64+0x45/0x80 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 8465 Comm: syz-executor.4 Not tainted 5.11.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================