================================================================== BUG: KCSAN: data-race in __lru_add_drain_all / folio_add_lru write to 0xffff888237c277c8 of 1 bytes by task 20128 on cpu 0: pagevec_add include/linux/pagevec.h:74 [inline] pagevec_add_and_need_flush mm/swap.c:236 [inline] folio_add_lru+0x62/0x160 mm/swap.c:468 lru_cache_add+0x37/0x50 mm/folio-compat.c:108 lru_cache_add_inactive_or_unevictable+0x46/0x140 mm/swap.c:500 wp_page_copy+0x781/0x10e0 mm/memory.c:3047 do_wp_page+0x4fb/0xa80 handle_pte_fault mm/memory.c:4569 [inline] __handle_mm_fault mm/memory.c:4686 [inline] handle_mm_fault+0x975/0x1590 mm/memory.c:4784 do_user_addr_fault+0x609/0xbe0 arch/x86/mm/fault.c:1397 handle_page_fault arch/x86/mm/fault.c:1485 [inline] exc_page_fault+0x91/0x290 arch/x86/mm/fault.c:1541 asm_exc_page_fault+0x1e/0x30 read to 0xffff888237c277c8 of 1 bytes by task 20125 on cpu 1: pagevec_count include/linux/pagevec.h:61 [inline] __lru_add_drain_all+0x12c/0x3e0 mm/swap.c:835 lru_add_drain_all+0xc/0x10 mm/swap.c:857 invalidate_bdev+0x56/0x80 block/bdev.c:88 invalidate_disk+0x25/0xb0 block/genhd.c:651 __loop_clr_fd+0x41f/0x6c0 drivers/block/loop.c:1147 loop_clr_fd drivers/block/loop.c:1237 [inline] lo_ioctl+0x985/0x1270 drivers/block/loop.c:1562 blkdev_ioctl+0x20e/0x440 block/ioctl.c:609 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:860 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x0b -> 0x0c Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 20125 Comm: syz-executor.3 Not tainted 5.16.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================