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BUG: KCSAN: data-race in __anon_vma_prepare / do_anonymous_page

write to 0xffff888104324e68 of 8 bytes by task 1747 on cpu 1:
 __anon_vma_prepare+0x148/0x2c0 mm/rmap.c:213
 anon_vma_prepare include/linux/rmap.h:159 [inline]
 do_anonymous_page+0x7b4/0xa10 mm/memory.c:4112
 handle_pte_fault mm/memory.c:4953 [inline]
 __handle_mm_fault mm/memory.c:5097 [inline]
 handle_mm_fault+0x88e/0xa80 mm/memory.c:5218
 do_user_addr_fault+0x4a1/0x980 arch/x86/mm/fault.c:1428
 handle_page_fault arch/x86/mm/fault.c:1519 [inline]
 exc_page_fault+0x60/0x160 arch/x86/mm/fault.c:1575
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
 __put_user_nocheck_4+0x3/0x11
 mptcp_ioctl+0x4ad/0x4c0 net/mptcp/protocol.c:3529
 inet_ioctl+0x158/0x2b0 net/ipv4/af_inet.c:981
 sock_do_ioctl+0x7d/0x250 net/socket.c:1169
 sock_ioctl+0x343/0x570 net/socket.c:1286
 vfs_ioctl fs/ioctl.c:51 [inline]
 do_vfs_ioctl+0x781/0x1390 fs/ioctl.c:830
 __do_sys_ioctl fs/ioctl.c:868 [inline]
 __se_sys_ioctl+0x83/0x140 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+0x63/0xcd

read to 0xffff888104324e68 of 8 bytes by task 1746 on cpu 0:
 anon_vma_prepare include/linux/rmap.h:156 [inline]
 do_anonymous_page+0x124/0xa10 mm/memory.c:4112
 handle_pte_fault mm/memory.c:4953 [inline]
 __handle_mm_fault mm/memory.c:5097 [inline]
 handle_mm_fault+0x88e/0xa80 mm/memory.c:5218
 do_user_addr_fault+0x4a1/0x980 arch/x86/mm/fault.c:1428
 handle_page_fault arch/x86/mm/fault.c:1519 [inline]
 exc_page_fault+0x60/0x160 arch/x86/mm/fault.c:1575
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570

value changed: 0x0000000000000000 -> 0xffff8881430b27e0

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 1746 Comm: syz-executor.2 Tainted: G        W          6.1.0-rc3-syzkaller-00072-g8e5423e991e8-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
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