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BUG: KCSAN: data-race in __find_get_block / has_bh_in_lru

read-write to 0xffff888237d2bb28 of 8 bytes by task 6246 on cpu 1:
 bh_lru_install fs/buffer.c:1343 [inline]
 __find_get_block+0x434/0x8a0 fs/buffer.c:1406
 bdev_getblk+0x30/0x3b0 fs/buffer.c:1431
 __getblk include/linux/buffer_head.h:380 [inline]
 sb_getblk include/linux/buffer_head.h:386 [inline]
 __ext4_get_inode_loc+0x2f7/0x910 fs/ext4/inode.c:4440
 ext4_get_inode_loc fs/ext4/inode.c:4568 [inline]
 ext4_reserve_inode_write+0xb0/0x200 fs/ext4/inode.c:5827
 __ext4_mark_inode_dirty+0x8e/0x440 fs/ext4/inode.c:6004
 ext4_dirty_inode+0x91/0xb0 fs/ext4/inode.c:6041
 __mark_inode_dirty+0x166/0x7e0 fs/fs-writeback.c:2515
 mark_inode_dirty include/linux/fs.h:2485 [inline]
 dquot_alloc_space include/linux/quotaops.h:319 [inline]
 dquot_alloc_block include/linux/quotaops.h:336 [inline]
 ext4_mb_new_blocks+0x103e/0x2020 fs/ext4/mballoc.c:6183
 ext4_ext_map_blocks+0x1008/0x35c0 fs/ext4/extents.c:4379
 ext4_map_create_blocks fs/ext4/inode.c:516 [inline]
 ext4_map_blocks+0x5aa/0xd20 fs/ext4/inode.c:702
 ext4_xattr_inode_write fs/ext4/xattr.c:1400 [inline]
 ext4_xattr_inode_lookup_create+0x888/0xf70 fs/ext4/xattr.c:1602
 ext4_xattr_ibody_set+0x131/0x3b0 fs/ext4/xattr.c:2269
 ext4_xattr_set_handle+0x7ea/0xbf0 fs/ext4/xattr.c:2446
 ext4_xattr_set+0x197/0x250 fs/ext4/xattr.c:2560
 ext4_xattr_trusted_set+0x3c/0x50 fs/ext4/xattr_trusted.c:38
 __vfs_setxattr+0x2e5/0x310 fs/xattr.c:200
 __vfs_setxattr_noperm+0xed/0x420 fs/xattr.c:234
 __vfs_setxattr_locked+0x1af/0x1d0 fs/xattr.c:295
 vfs_setxattr+0x140/0x290 fs/xattr.c:321
 do_setxattr fs/xattr.c:636 [inline]
 filename_setxattr+0x198/0x2a0 fs/xattr.c:665
 path_setxattrat+0x284/0x310 fs/xattr.c:713
 __do_sys_setxattr fs/xattr.c:747 [inline]
 __se_sys_setxattr fs/xattr.c:743 [inline]
 __x64_sys_setxattr+0x6e/0x90 fs/xattr.c:743
 x64_sys_call+0x2247/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:189
 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 0xffff888237d2bb28 of 8 bytes by task 3325 on cpu 0:
 has_bh_in_lru+0x35/0x1f0 fs/buffer.c:1527
 cpu_needs_drain mm/swap.c:779 [inline]
 __lru_add_drain_all+0x23f/0x3f0 mm/swap.c:866
 lru_add_drain_all+0x10/0x20 mm/swap.c:882
 invalidate_bdev+0x47/0x70 block/bdev.c:101
 ext4_put_super+0x571/0x840 fs/ext4/super.c:1356
 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:7379
 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:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xa8/0x120 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: 0x0000000000000000 -> 0xffff888104c0c208

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 3325 Comm: syz-executor Not tainted 6.12.0-syzkaller-01782-gbf9aa14fc523 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
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