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BUG: KCSAN: data-race in __anon_vma_prepare / do_anonymous_page

write to 0xffff888104b078c8 of 8 bytes by task 32734 on cpu 1:
 __anon_vma_prepare+0x12c/0x2a0 mm/rmap.c:211
 anon_vma_prepare include/linux/rmap.h:156 [inline]
 do_anonymous_page+0x7ba/0xa20 mm/memory.c:4074
 handle_pte_fault mm/memory.c:4901 [inline]
 __handle_mm_fault mm/memory.c:5042 [inline]
 handle_mm_fault+0x8a0/0xa90 mm/memory.c:5140
 do_user_addr_fault+0x4cd/0x940 arch/x86/mm/fault.c:1397
 handle_page_fault arch/x86/mm/fault.c:1484 [inline]
 exc_page_fault+0x60/0x160 arch/x86/mm/fault.c:1540
 asm_exc_page_fault+0x27/0x30

read to 0xffff888104b078c8 of 8 bytes by task 32735 on cpu 0:
 anon_vma_prepare include/linux/rmap.h:153 [inline]
 do_anonymous_page+0x127/0xa20 mm/memory.c:4074
 handle_pte_fault mm/memory.c:4901 [inline]
 __handle_mm_fault mm/memory.c:5042 [inline]
 handle_mm_fault+0x8a0/0xa90 mm/memory.c:5140
 do_user_addr_fault+0x4cd/0x940 arch/x86/mm/fault.c:1397
 handle_page_fault arch/x86/mm/fault.c:1484 [inline]
 exc_page_fault+0x60/0x160 arch/x86/mm/fault.c:1540
 asm_exc_page_fault+0x27/0x30
 __put_user_nocheck_4+0x3/0x11
 raw_ioctl+0x52/0xd0 net/ipv4/raw.c:891
 inet_ioctl+0x158/0x2b0 net/ipv4/af_inet.c:972
 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_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: 0x0000000000000000 -> 0xffff8881072aec80

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 32735 Comm: syz-executor.3 Not tainted 5.19.0-rc1-syzkaller-00023-g34f4335c16a5-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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