================================================================== BUG: KCSAN: data-race in __lru_add_drain_all / folio_add_lru_vma read-write to 0xffff888237d29c88 of 1 bytes by task 3093 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 do_anonymous_page mm/memory.c:4323 [inline] do_pte_missing mm/memory.c:3743 [inline] handle_pte_fault mm/memory.c:5144 [inline] __handle_mm_fault mm/memory.c:5285 [inline] handle_mm_fault+0x1da5/0x27c0 mm/memory.c:5450 do_user_addr_fault arch/x86/mm/fault.c:1364 [inline] handle_page_fault arch/x86/mm/fault.c:1507 [inline] exc_page_fault+0x401/0x6d0 arch/x86/mm/fault.c:1563 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 read to 0xffff888237d29c88 of 1 bytes by task 16305 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 block/bdev.c:89 [inline] bdev_mark_dead+0xe9/0x110 block/bdev.c:1057 disk_force_media_change+0xb6/0xe0 block/disk-events.c:298 __loop_clr_fd+0x242/0x3a0 drivers/block/loop.c:1170 loop_clr_fd drivers/block/loop.c:1253 [inline] lo_ioctl+0xe93/0x12e0 drivers/block/loop.c:1557 blkdev_ioctl+0x375/0x460 block/ioctl.c:634 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl+0xcf/0x140 fs/ioctl.c:857 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b value changed: 0x06 -> 0x0f Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 16305 Comm: syz-executor.1 Not tainted 6.8.0-rc3-syzkaller-00005-g99bd3cb0d12e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 ==================================================================