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BUG: KCSAN: data-race in __lru_add_drain_all / folio_batch_move_lru

write to 0xffff888237c29988 of 1 bytes by task 6247 on cpu 0:
 folio_batch_reinit include/linux/pagevec.h:48 [inline]
 folio_batch_move_lru+0x2bf/0x2f0 mm/swap.c:225
 lru_add_drain_cpu+0x77/0x270 mm/swap.c:652
 lru_add_drain+0x34/0x80 mm/swap.c:752
 shift_arg_pages fs/exec.c:719 [inline]
 setup_arg_pages+0x705/0x930 fs/exec.c:837
 load_elf_binary+0x816/0x1960 fs/binfmt_elf.c:1018
 search_binary_handler fs/exec.c:1739 [inline]
 exec_binprm fs/exec.c:1781 [inline]
 bprm_execve+0x6d3/0xef0 fs/exec.c:1856
 kernel_execve+0x614/0x670 fs/exec.c:2024
 call_usermodehelper_exec_async+0x199/0x240 kernel/umh.c:110
 ret_from_fork+0x48/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

read to 0xffff888237c29988 of 1 bytes by task 3092 on cpu 1:
 folio_batch_count include/linux/pagevec.h:53 [inline]
 cpu_needs_drain mm/swap.c:795 [inline]
 __lru_add_drain_all+0x137/0x420 mm/swap.c:889
 lru_add_drain_all+0x10/0x20 mm/swap.c:905
 invalidate_bdev+0x54/0x70 block/bdev.c:86
 ext4_put_super+0x51b/0x7d0 fs/ext4/super.c:1353
 generic_shutdown_super+0xdb/0x210 fs/super.c:693
 kill_block_super+0x2a/0x60 fs/super.c:1646
 ext4_kill_sb+0x44/0x80 fs/ext4/super.c:7305
 deactivate_locked_super+0x73/0x1c0 fs/super.c:481
 deactivate_super+0x9b/0xb0 fs/super.c:514
 cleanup_mnt+0x272/0x2e0 fs/namespace.c:1254
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1261
 task_work_run+0x135/0x1a0 kernel/task_work.c:180
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xd6/0xe0 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0x6c/0xb0 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x26/0x140 kernel/entry/common.c:296
 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x01 -> 0x00

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 3092 Comm: syz-executor.1 Not tainted 6.6.0-rc3-syzkaller-00146-g9f3ebbef746f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
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