syzbot

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BUG: KCSAN: data-race in __anon_vma_prepare / lock_vma_under_rcu

write to 0xffff88810c04b508 of 8 bytes by task 2004 on cpu 0:
 __anon_vma_prepare+0x147/0x2b0 mm/rmap.c:214
 anon_vma_prepare include/linux/rmap.h:159 [inline]
 do_anonymous_page mm/memory.c:4169 [inline]
 do_pte_missing mm/memory.c:3728 [inline]
 handle_pte_fault mm/memory.c:5038 [inline]
 __handle_mm_fault mm/memory.c:5179 [inline]
 handle_mm_fault+0x224c/0x2dd0 mm/memory.c:5344
 do_user_addr_fault arch/x86/mm/fault.c:1413 [inline]
 handle_page_fault arch/x86/mm/fault.c:1505 [inline]
 exc_page_fault+0x2f7/0x6c0 arch/x86/mm/fault.c:1561
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
 __put_user_4+0x11/0x20 arch/x86/lib/putuser.S:86
 __sys_socketpair+0xba/0x420 net/socket.c:1754
 __do_sys_socketpair net/socket.c:1820 [inline]
 __se_sys_socketpair net/socket.c:1817 [inline]
 __x64_sys_socketpair+0x52/0x60 net/socket.c:1817
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

read to 0xffff88810c04b508 of 8 bytes by task 1999 on cpu 1:
 lock_vma_under_rcu+0x16a/0x2a0 mm/memory.c:5509
 do_user_addr_fault arch/x86/mm/fault.c:1356 [inline]
 handle_page_fault arch/x86/mm/fault.c:1505 [inline]
 exc_page_fault+0x164/0x6c0 arch/x86/mm/fault.c:1561
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570

value changed: 0x0000000000000000 -> 0xffff888151e52410

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 1999 Comm: syz-executor.5 Tainted: G        W          6.7.0-rc4-syzkaller-00111-g5e3f5b81de80 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
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