EXT4-fs (loop4): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
==================================================================
BUG: KCSAN: data-race in mlock_new_folio / need_mlock_drain

read-write to 0xffff888237d2b370 of 1 bytes by task 4174 on cpu 1:
 folio_batch_add include/linux/pagevec.h:77 [inline]
 mlock_new_folio+0x114/0x200 mm/mlock.c:280
 folio_add_lru_vma+0x5d/0x60 mm/swap.c:544
 do_anonymous_page mm/memory.c:4604 [inline]
 do_pte_missing mm/memory.c:3945 [inline]
 handle_pte_fault mm/memory.c:5521 [inline]
 __handle_mm_fault mm/memory.c:5664 [inline]
 handle_mm_fault+0x246c/0x2a30 mm/memory.c:5832
 faultin_page mm/gup.c:1194 [inline]
 __get_user_pages+0x499/0x10d0 mm/gup.c:1493
 populate_vma_page_range mm/gup.c:1932 [inline]
 __mm_populate+0x25b/0x3b0 mm/gup.c:2035
 mm_populate include/linux/mm.h:3430 [inline]
 __do_sys_mremap mm/mremap.c:1200 [inline]
 __se_sys_mremap+0x960/0xf20 mm/mremap.c:993
 __x64_sys_mremap+0x67/0x80 mm/mremap.c:993
 x64_sys_call+0x2747/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:26
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff888237d2b370 of 1 bytes by task 4183 on cpu 0:
 folio_batch_count include/linux/pagevec.h:56 [inline]
 need_mlock_drain+0x30/0x50 mm/mlock.c:235
 cpu_needs_drain mm/swap.c:824 [inline]
 __lru_add_drain_all+0x235/0x410 mm/swap.c:912
 lru_add_drain_all+0x10/0x20 mm/swap.c:928
 invalidate_bdev+0x47/0x70 block/bdev.c:100
 loop_set_status+0x114/0x550 drivers/block/loop.c:1264
 lo_ioctl+0x7fd/0x11d0
 blkdev_ioctl+0x35f/0x450 block/ioctl.c:676
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0xd3/0x150 fs/ioctl.c:893
 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:893
 x64_sys_call+0x15cc/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x14 -> 0x1b

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 4183 Comm: syz.4.89 Not tainted 6.11.0-rc6-syzkaller-00183-gb831f83e40a2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
==================================================================
loop4: detected capacity change from 1024 to 1023
EXT4-fs (loop4): unmounting filesystem 00000000-0000-0000-0000-000000000000.