EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000.
==================================================================
BUG: KCSAN: data-race in __lru_add_drain_all / folio_activate

read-write to 0xffff888237d27df8 of 1 bytes by task 7418 on cpu 1:
 folio_batch_add include/linux/pagevec.h:129 [inline]
 folio_batch_add_and_move mm/swap.c:261 [inline]
 folio_activate+0xce/0x1c0 mm/swap.c:391
 folio_mark_accessed+0x138/0x1a0 mm/swap.c:511
 mark_page_accessed+0x3b/0xe0 mm/folio-compat.c:44
 zap_pte_range+0x649/0x16d0 mm/memory.c:1401
 zap_pmd_range mm/memory.c:1529 [inline]
 zap_pud_range mm/memory.c:1558 [inline]
 zap_p4d_range mm/memory.c:1579 [inline]
 unmap_page_range+0x3cf/0x760 mm/memory.c:1600
 unmap_single_vma+0x151/0x1d0 mm/memory.c:1646
 unmap_vmas+0x135/0x1e0 mm/memory.c:1685
 exit_mmap+0x13d/0x4d0 mm/mmap.c:3085
 __mmput+0x27/0x1b0 kernel/fork.c:1207
 mmput+0x3d/0x50 kernel/fork.c:1229
 exit_mm+0xd3/0x170 kernel/exit.c:563
 do_exit+0x52b/0x16e0 kernel/exit.c:854
 do_group_exit+0xfe/0x140 kernel/exit.c:1012
 get_signal+0xb4b/0xc70 kernel/signal.c:2859
 arch_do_signal_or_restart+0x85/0x290 arch/x86/kernel/signal.c:306
 exit_to_user_mode_loop+0x78/0x130 kernel/entry/common.c:168
 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

read to 0xffff888237d27df8 of 1 bytes by task 3156 on cpu 0:
 folio_batch_count include/linux/pagevec.h:108 [inline]
 cpu_needs_drain mm/swap.c:834 [inline]
 __lru_add_drain_all+0x22a/0x3c0 mm/swap.c:923
 lru_add_drain_all+0xc/0x10 mm/swap.c:939
 invalidate_bdev+0x56/0x80 block/bdev.c:86
 ext4_put_super+0x510/0x810 fs/ext4/super.c:1273
 generic_shutdown_super+0xd5/0x240 fs/super.c:492
 kill_block_super+0x4a/0x90 fs/super.c:1386
 deactivate_locked_super+0x6a/0xb0 fs/super.c:332
 deactivate_super+0x85/0x90 fs/super.c:363
 cleanup_mnt+0x267/0x2d0 fs/namespace.c:1291
 __cleanup_mnt+0x15/0x20 fs/namespace.c:1298
 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: 0x0a -> 0x0f

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 3156 Comm: syz-executor.3 Not tainted 6.2.0-rc2-syzkaller-00203-g1f5abbd77e2c-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
==================================================================
EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000.