================================================================== BUG: KCSAN: data-race in __anon_vma_prepare / do_anonymous_page write to 0xffff88811c58e148 of 8 bytes by task 13198 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 0xffff88811c58e148 of 8 bytes by task 13200 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 __sys_socketpair+0xb6/0x420 net/socket.c:1685 __do_sys_socketpair net/socket.c:1751 [inline] __se_sys_socketpair net/socket.c:1748 [inline] __x64_sys_socketpair+0x4e/0x60 net/socket.c:1748 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 -> 0xffff888104a7c0f0 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 13200 Comm: syz-executor.0 Not tainted 5.19.0-rc5-syzkaller-00200-ga471da3100ef-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 ==================================================================