==================================================================
BUG: KCSAN: data-race in mlock_pagevec / need_mlock_page_drain

write to 0xffff888237d27ec0 of 1 bytes by task 29480 on cpu 1:
 pagevec_reinit include/linux/pagevec.h:57 [inline]
 mlock_pagevec+0x13a/0x150 mm/mlock.c:210
 mlock_folio+0x282/0x2d0 mm/mlock.c:260
 mlock_vma_folio mm/internal.h:524 [inline]
 mlock_vma_page mm/internal.h:530 [inline]
 page_add_file_rmap+0x10b/0x1b0 mm/rmap.c:1336
 do_set_pte+0x258/0x500 mm/memory.c:4309
 filemap_map_pages+0x675/0xae0 mm/filemap.c:3392
 do_fault_around mm/memory.c:4480 [inline]
 do_read_fault mm/memory.c:4506 [inline]
 do_fault+0x433/0xb20 mm/memory.c:4640
 handle_pte_fault mm/memory.c:4903 [inline]
 __handle_mm_fault mm/memory.c:5042 [inline]
 handle_mm_fault+0x889/0xa90 mm/memory.c:5140
 faultin_page mm/gup.c:953 [inline]
 __get_user_pages+0x34a/0xbf0 mm/gup.c:1174
 populate_vma_page_range mm/gup.c:1518 [inline]
 __mm_populate+0x26e/0x3a0 mm/gup.c:1631
 mm_populate include/linux/mm.h:2706 [inline]
 vm_mmap_pgoff+0x160/0x1f0 mm/util.c:557
 ksys_mmap_pgoff+0x265/0x320 mm/mmap.c:1633
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x46/0xb0

read to 0xffff888237d27ec0 of 1 bytes by task 29477 on cpu 0:
 pagevec_count include/linux/pagevec.h:62 [inline]
 need_mlock_page_drain+0x2c/0x50 mm/mlock.c:236
 __lru_add_drain_all+0x24c/0x3e0 mm/swap.c:832
 lru_add_drain_all+0xc/0x10 mm/swap.c:849
 invalidate_bdev+0x56/0x80 block/bdev.c:87
 invalidate_disk+0x25/0xb0 block/genhd.c:678
 __loop_clr_fd+0x176/0x3c0 drivers/block/loop.c:1159
 loop_clr_fd drivers/block/loop.c:1252 [inline]
 lo_ioctl+0xd8c/0x1290 drivers/block/loop.c:1558
 blkdev_ioctl+0x20e/0x440 block/ioctl.c:614
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:856
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x46/0xb0

value changed: 0x0f -> 0x01

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 29477 Comm: syz-executor.2 Not tainted 5.19.0-rc1-syzkaller-00303-g7a68065eb9cd-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================