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BUG: KCSAN: data-race in __find_get_block / has_bh_in_lru

read-write to 0xffff888237c2bb10 of 8 bytes by task 10423 on cpu 0:
 bh_lru_install fs/buffer.c:1343 [inline]
 __find_get_block+0x434/0x8a0 fs/buffer.c:1406
 __getblk_slow fs/buffer.c:1131 [inline]
 bdev_getblk+0x139/0x3b0 fs/buffer.c:1437
 __getblk include/linux/buffer_head.h:380 [inline]
 sb_getblk include/linux/buffer_head.h:386 [inline]
 ext4_getblk+0x1b4/0x500 fs/ext4/inode.c:859
 ext4_bread+0x2c/0x110 fs/ext4/inode.c:905
 ext4_quota_read+0x103/0x1c0 fs/ext4/super.c:7180
 read_blk fs/quota/quota_tree.c:61 [inline]
 find_tree_dqentry+0xff/0x890 fs/quota/quota_tree.c:671
 find_tree_dqentry+0x4c6/0x890 fs/quota/quota_tree.c:698
 find_tree_dqentry+0x4c6/0x890 fs/quota/quota_tree.c:698
 find_tree_dqentry+0x4c6/0x890 fs/quota/quota_tree.c:698
 find_dqentry fs/quota/quota_tree.c:716 [inline]
 qtree_read_dquot+0x353/0x4b0 fs/quota/quota_tree.c:736
 v2_read_dquot+0x96/0xd0 fs/quota/quota_v2.c:344
 dquot_acquire+0xc3/0x2b0 fs/quota/dquot.c:462
 ext4_acquire_dquot+0x170/0x210 fs/ext4/super.c:6875
 dqget+0x522/0x8b0 fs/quota/dquot.c:976
 __dquot_initialize+0x194/0x760 fs/quota/dquot.c:1504
 dquot_initialize+0x1a/0x20 fs/quota/dquot.c:1566
 ext4_create+0x4b/0x2f0 fs/ext4/namei.c:2827
 lookup_open fs/namei.c:3595 [inline]
 open_last_lookups fs/namei.c:3694 [inline]
 path_openat+0xe92/0x1fa0 fs/namei.c:3930
 do_filp_open+0xf7/0x200 fs/namei.c:3960
 do_sys_openat2+0xab/0x120 fs/open.c:1415
 do_sys_open fs/open.c:1430 [inline]
 __do_sys_openat fs/open.c:1446 [inline]
 __se_sys_openat fs/open.c:1441 [inline]
 __x64_sys_openat+0xf3/0x120 fs/open.c:1441
 x64_sys_call+0x1025/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:258
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff888237c2bb10 of 8 bytes by task 3319 on cpu 1:
 has_bh_in_lru+0x35/0x1f0 fs/buffer.c:1527
 smp_call_function_many_cond+0x2d5/0xc20 kernel/smp.c:837
 on_each_cpu_cond_mask+0x3c/0x90 kernel/smp.c:1051
 on_each_cpu_cond include/linux/smp.h:105 [inline]
 invalidate_bh_lrus+0x2a/0x30 fs/buffer.c:1536
 invalidate_bdev+0x42/0x70 block/bdev.c:100
 ext4_put_super+0x571/0x840 fs/ext4/super.c:1349
 generic_shutdown_super+0xe5/0x220 fs/super.c:642
 kill_block_super+0x2a/0x70 fs/super.c:1710
 ext4_kill_sb+0x44/0x80 fs/ext4/super.c:7320
 deactivate_locked_super+0x7d/0x1c0 fs/super.c:473
 deactivate_super+0x9f/0xb0 fs/super.c:506
 cleanup_mnt+0x268/0x2e0 fs/namespace.c:1373
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1380
 task_work_run+0x13a/0x1a0 kernel/task_work.c:239
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xbe/0x130 kernel/entry/common.c:218
 do_syscall_64+0xd6/0x1c0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0xffff8881148c8ea0 -> 0xffff88812df6f3a8

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 3319 Comm: syz-executor Not tainted 6.12.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
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