================================================================== BUG: KCSAN: data-race in __anon_vma_prepare / lock_vma_under_rcu write to 0xffff88813d4ba1c0 of 8 bytes by task 19056 on cpu 0: __anon_vma_prepare+0x147/0x2b0 mm/rmap.c:214 anon_vma_prepare include/linux/rmap.h:164 [inline] do_anonymous_page mm/memory.c:4269 [inline] do_pte_missing mm/memory.c:3743 [inline] handle_pte_fault mm/memory.c:5144 [inline] __handle_mm_fault mm/memory.c:5285 [inline] handle_mm_fault+0x2248/0x27b0 mm/memory.c:5450 do_user_addr_fault arch/x86/mm/fault.c:1415 [inline] handle_page_fault arch/x86/mm/fault.c:1507 [inline] exc_page_fault+0x2f7/0x6d0 arch/x86/mm/fault.c:1563 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 rep_movs_alternative+0x33/0x70 arch/x86/lib/copy_user_64.S:57 copy_user_generic arch/x86/include/asm/uaccess_64.h:112 [inline] raw_copy_to_user arch/x86/include/asm/uaccess_64.h:133 [inline] _copy_to_user+0x77/0x90 lib/usercopy.c:41 copy_to_user include/linux/uaccess.h:191 [inline] put_timespec64+0x64/0xb0 kernel/time/time.c:910 __do_sys_clock_gettime kernel/time/posix-timers.c:1144 [inline] __se_sys_clock_gettime kernel/time/posix-timers.c:1132 [inline] __x64_sys_clock_gettime+0x132/0x170 kernel/time/posix-timers.c:1132 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x59/0x120 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b read to 0xffff88813d4ba1c0 of 8 bytes by task 19049 on cpu 1: lock_vma_under_rcu+0x161/0x290 mm/memory.c:5615 do_user_addr_fault arch/x86/mm/fault.c:1356 [inline] handle_page_fault arch/x86/mm/fault.c:1507 [inline] exc_page_fault+0x164/0x6d0 arch/x86/mm/fault.c:1563 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 value changed: 0x0000000000000000 -> 0xffff8881784907b8 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 19049 Comm: syz-executor.3 Tainted: G W 6.8.0-rc1-syzkaller-00385-g4854cf9c61d0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 ==================================================================