syzbot

==================================================================
BUG: KCSAN: data-race in mprotect_fixup / page_vma_mapped_walk

write to 0xffff888113d9a840 of 8 bytes by task 4430 on cpu 0:
 vm_flags_init include/linux/mm.h:875 [inline]
 vm_flags_reset include/linux/mm.h:887 [inline]
 mprotect_fixup+0x419/0x5e0 mm/mprotect.c:679
 do_mprotect_pkey+0x6cc/0x9a0 mm/mprotect.c:840
 __do_sys_mprotect mm/mprotect.c:861 [inline]
 __se_sys_mprotect mm/mprotect.c:858 [inline]
 __x64_sys_mprotect+0x48/0x60 mm/mprotect.c:858
 x64_sys_call+0x2770/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:11
 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 0xffff888113d9a840 of 8 bytes by task 4413 on cpu 1:
 is_vm_hugetlb_page include/linux/hugetlb_inline.h:11 [inline]
 page_vma_mapped_walk+0xb6/0xb90 mm/page_vma_mapped.c:195
 remove_migration_pte+0xf7/0x9c0 mm/migrate.c:245
 rmap_walk_anon+0x28f/0x440 mm/rmap.c:2646
 rmap_walk+0x5b/0x70 mm/rmap.c:2724
 remove_migration_ptes mm/migrate.c:365 [inline]
 migrate_folio_move mm/migrate.c:1381 [inline]
 migrate_folios_move mm/migrate.c:1712 [inline]
 migrate_pages_batch+0x1390/0x1930 mm/migrate.c:1959
 migrate_pages_sync mm/migrate.c:1989 [inline]
 migrate_pages+0xf02/0x1840 mm/migrate.c:2098
 do_mbind mm/mempolicy.c:1394 [inline]
 kernel_mbind mm/mempolicy.c:1537 [inline]
 __do_sys_mbind mm/mempolicy.c:1611 [inline]
 __se_sys_mbind+0xfd1/0x11c0 mm/mempolicy.c:1607
 __x64_sys_mbind+0x78/0x90 mm/mempolicy.c:1607
 x64_sys_call+0x2662/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:238
 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: 0x0000000000102077 -> 0x0000000000102071

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 4413 Comm: syz.3.443 Not tainted 6.14.0-rc1-syzkaller-00034-g92514ef226f5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
==================================================================