==================================================================
BUG: KCSAN: data-race in __lru_add_drain_all / folio_batch_move_lru

write to 0xffff888237d29c88 of 1 bytes by task 3067 on cpu 1:
 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
 zap_page_range_single+0x5a/0x2f0 mm/memory.c:1782
 madvise_dontneed_single_vma mm/madvise.c:816 [inline]
 madvise_dontneed_free mm/madvise.c:897 [inline]
 madvise_vma_behavior mm/madvise.c:1036 [inline]
 madvise_walk_vmas mm/madvise.c:1261 [inline]
 do_madvise+0xe62/0x25e0 mm/madvise.c:1441
 __do_sys_madvise mm/madvise.c:1454 [inline]
 __se_sys_madvise mm/madvise.c:1452 [inline]
 __x64_sys_madvise+0x60/0x70 mm/madvise.c:1452
 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

read to 0xffff888237d29c88 of 1 bytes by task 3094 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:89
 invalidate_disk+0x29/0x80 block/genhd.c:747
 __loop_clr_fd+0x163/0x3a0 drivers/block/loop.c:1160
 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: 0x01 -> 0x00

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 3094 Comm: syz-executor.0 Not tainted 6.8.0-rc6-syzkaller-00011-g45ec2f5f6ed3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
==================================================================
__loop_clr_fd: partition scan of loop0 failed (rc=-16)
__loop_clr_fd: partition scan of loop0 failed (rc=-16)