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BUG: KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru

write to 0xffff888237c28438 of 8 bytes by task 29246 on cpu 0:
 __invalidate_bh_lrus fs/buffer.c:1381 [inline]
 invalidate_bh_lru+0xad/0x110 fs/buffer.c:1393
 smp_call_function_many_cond+0x4ee/0x650 kernel/smp.c:978
 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1155
 on_each_cpu_cond include/linux/smp.h:105 [inline]
 invalidate_bh_lrus+0x26/0x30 fs/buffer.c:1412
 kill_bdev block/bdev.c:75 [inline]
 set_blocksize+0x242/0x270 block/bdev.c:152
 sb_set_blocksize block/bdev.c:161 [inline]
 sb_min_blocksize+0x92/0x110 block/bdev.c:177
 isofs_fill_super+0x702/0x17b0 fs/isofs/inode.c:658
 mount_bdev+0x1e2/0x280 fs/super.c:1401
 isofs_mount+0x2d/0x40 fs/isofs/inode.c:1564
 legacy_get_tree+0x70/0xc0 fs/fs_context.c:610
 vfs_get_tree+0x49/0x190 fs/super.c:1531
 do_new_mount+0x200/0x650 fs/namespace.c:3040
 path_mount+0x4aa/0xb70 fs/namespace.c:3370
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount+0x281/0x2d0 fs/namespace.c:3568
 __x64_sys_mount+0x63/0x70 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff888237c28438 of 8 bytes by task 5518 on cpu 1:
 has_bh_in_lru+0x31/0x1c0 fs/buffer.c:1403
 smp_call_function_many_cond+0x2e3/0x650 kernel/smp.c:935
 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1155
 on_each_cpu_cond include/linux/smp.h:105 [inline]
 invalidate_bh_lrus+0x26/0x30 fs/buffer.c:1412
 kill_bdev block/bdev.c:75 [inline]
 blkdev_flush_mapping+0xb6/0x1c0 block/bdev.c:662
 blkdev_put_whole block/bdev.c:693 [inline]
 blkdev_put+0x32d/0x420 block/bdev.c:953
 kill_block_super+0x7b/0x90 fs/super.c:1431
 deactivate_locked_super+0x6a/0xb0 fs/super.c:332
 deactivate_super+0x85/0x90 fs/super.c:363
 cleanup_mnt+0x267/0x2d0 fs/namespace.c:1186
 __cleanup_mnt+0x15/0x20 fs/namespace.c:1193
 task_work_run+0xde/0x110 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0x124/0x130 kernel/entry/common.c:171
 exit_to_user_mode_prepare kernel/entry/common.c:203 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x6a/0x90 kernel/entry/common.c:296
 do_syscall_64+0x37/0x70 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0xffff8881063d7958 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 5518 Comm: syz-executor.4 Not tainted 6.1.0-rc3-syzkaller-00332-g089d1c31224e-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
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