================================================================== BUG: KCSAN: data-race in __lru_add_drain_all / folio_add_lru_vma read-write to 0xffff888237d29988 of 1 bytes by task 19241 on cpu 1: folio_batch_add include/linux/pagevec.h:74 [inline] folio_batch_add_and_move mm/swap.c:231 [inline] folio_add_lru mm/swap.c:517 [inline] folio_add_lru_vma+0x6c/0x160 mm/swap.c:537 wp_page_copy mm/memory.c:3189 [inline] do_wp_page+0x10f8/0x1f40 mm/memory.c:3510 handle_pte_fault mm/memory.c:5054 [inline] __handle_mm_fault mm/memory.c:5179 [inline] handle_mm_fault+0xe5d/0x2dd0 mm/memory.c:5344 do_user_addr_fault arch/x86/mm/fault.c:1364 [inline] handle_page_fault arch/x86/mm/fault.c:1505 [inline] exc_page_fault+0x3ff/0x6c0 arch/x86/mm/fault.c:1561 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 read to 0xffff888237d29988 of 1 bytes by task 3134 on cpu 0: 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/0x7e0 fs/ext4/super.c:1361 generic_shutdown_super+0xdb/0x210 fs/super.c:696 kill_block_super+0x2a/0x60 fs/super.c:1667 ext4_kill_sb+0x44/0x80 fs/ext4/super.c:7330 deactivate_locked_super+0x7a/0x1c0 fs/super.c:484 deactivate_super+0x9b/0xb0 fs/super.c:517 cleanup_mnt+0x272/0x2e0 fs/namespace.c:1256 __cleanup_mnt+0x19/0x20 fs/namespace.c:1263 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+0x50/0x110 arch/x86/entry/common.c:88 entry_SYSCALL_64_after_hwframe+0x63/0x6b value changed: 0x00 -> 0x01 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 3134 Comm: syz-executor.3 Not tainted 6.7.0-rc3-syzkaller-00014-gdf60cee26a2e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 ================================================================== EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000.