loop1: detected capacity change from 0 to 1
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BUG: KCSAN: data-race in mlock_new_page / need_mlock_page_drain

read-write to 0xffff888237c27f00 of 1 bytes by task 15075 on cpu 0:
 pagevec_add include/linux/pagevec.h:75 [inline]
 mlock_new_page+0x238/0x500 mm/mlock.c:280
 lru_cache_add_inactive_or_unevictable+0x55/0x60 mm/swap.c:486
 do_anonymous_page+0x708/0xa10 mm/memory.c:3866
 handle_pte_fault mm/memory.c:4625 [inline]
 __handle_mm_fault mm/memory.c:4763 [inline]
 handle_mm_fault+0x83c/0xa40 mm/memory.c:4861
 faultin_page mm/gup.c:878 [inline]
 __get_user_pages+0x306/0xb80 mm/gup.c:1099
 populate_vma_page_range mm/gup.c:1442 [inline]
 __mm_populate+0x26e/0x3a0 mm/gup.c:1555
 mm_populate include/linux/mm.h:2701 [inline]
 __do_sys_mlockall+0x24b/0x2d0 mm/mlock.c:720
 __se_sys_mlockall mm/mlock.c:696 [inline]
 __x64_sys_mlockall+0x1a/0x20 mm/mlock.c:696
 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+0x44/0xae

read to 0xffff888237c27f00 of 1 bytes by task 15066 on cpu 1:
 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
 bdev_disk_changed+0xed/0xc30 block/partitions/core.c:674
 loop_reread_partitions drivers/block/loop.c:517 [inline]
 loop_set_status+0x4ee/0x590 drivers/block/loop.c:1304
 lo_ioctl+0x810/0x11b0
 blkdev_ioctl+0x20e/0x440 block/ioctl.c:588
 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+0x44/0xae

value changed: 0x0d -> 0x03

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 15066 Comm: syz-executor.1 Not tainted 5.18.0-rc7-syzkaller-00121-g3d7285a335ed-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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