================================================================== BUG: KCSAN: data-race in copy_page_from_iter / copy_page_from_iter write to 0xffff888126add000 of 4096 bytes by task 22907 on cpu 0: instrument_copy_from_user include/linux/instrumented.h:136 [inline] copyin lib/iov_iter.c:165 [inline] copy_page_from_iter_iovec lib/iov_iter.c:310 [inline] copy_page_from_iter+0x279/0x5f0 lib/iov_iter.c:902 process_vm_rw_pages mm/process_vm_access.c:43 [inline] process_vm_rw_single_vec+0x273/0x440 mm/process_vm_access.c:117 process_vm_rw_core mm/process_vm_access.c:215 [inline] process_vm_rw+0x3e1/0x570 mm/process_vm_access.c:283 __do_sys_process_vm_writev mm/process_vm_access.c:303 [inline] __se_sys_process_vm_writev mm/process_vm_access.c:298 [inline] __x64_sys_process_vm_writev+0x76/0x90 mm/process_vm_access.c:298 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+0x44/0xae write to 0xffff888126add000 of 4096 bytes by task 22906 on cpu 1: instrument_copy_from_user include/linux/instrumented.h:136 [inline] copyin lib/iov_iter.c:165 [inline] copy_page_from_iter_iovec lib/iov_iter.c:310 [inline] copy_page_from_iter+0x279/0x5f0 lib/iov_iter.c:902 process_vm_rw_pages mm/process_vm_access.c:43 [inline] process_vm_rw_single_vec+0x273/0x440 mm/process_vm_access.c:117 process_vm_rw_core mm/process_vm_access.c:215 [inline] process_vm_rw+0x3e1/0x570 mm/process_vm_access.c:283 __do_sys_process_vm_writev mm/process_vm_access.c:303 [inline] __se_sys_process_vm_writev mm/process_vm_access.c:298 [inline] __x64_sys_process_vm_writev+0x76/0x90 mm/process_vm_access.c:298 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+0x44/0xae Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 22906 Comm: syz-executor.4 Not tainted 5.18.0-rc2-syzkaller-00122-gb9b4c79e5830-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================