================================================================== BUG: KCSAN: data-race in _copy_from_iter / _copy_from_iter write to 0xffff88815dd32000 of 4096 bytes by task 3242 on cpu 1: instrument_copy_from_user_before include/linux/instrumented.h:130 [inline] copy_from_user_iter lib/iov_iter.c:54 [inline] iterate_iovec include/linux/iov_iter.h:51 [inline] iterate_and_advance2 include/linux/iov_iter.h:247 [inline] iterate_and_advance include/linux/iov_iter.h:271 [inline] __copy_from_iter lib/iov_iter.c:268 [inline] _copy_from_iter+0x2e7/0xb60 lib/iov_iter.c:279 copy_page_from_iter+0x14f/0x280 lib/iov_iter.c:441 process_vm_rw_pages mm/process_vm_access.c:43 [inline] process_vm_rw_single_vec mm/process_vm_access.c:117 [inline] process_vm_rw_core mm/process_vm_access.c:215 [inline] process_vm_rw+0x5d3/0x8c0 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+0x7a/0x90 mm/process_vm_access.c:298 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b write to 0xffff88815dd32000 of 4096 bytes by task 3243 on cpu 0: instrument_copy_from_user_before include/linux/instrumented.h:130 [inline] copy_from_user_iter lib/iov_iter.c:54 [inline] iterate_iovec include/linux/iov_iter.h:51 [inline] iterate_and_advance2 include/linux/iov_iter.h:247 [inline] iterate_and_advance include/linux/iov_iter.h:271 [inline] __copy_from_iter lib/iov_iter.c:268 [inline] _copy_from_iter+0x2e7/0xb60 lib/iov_iter.c:279 copy_page_from_iter+0x14f/0x280 lib/iov_iter.c:441 process_vm_rw_pages mm/process_vm_access.c:43 [inline] process_vm_rw_single_vec mm/process_vm_access.c:117 [inline] process_vm_rw_core mm/process_vm_access.c:215 [inline] process_vm_rw+0x5d3/0x8c0 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+0x7a/0x90 mm/process_vm_access.c:298 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 3243 Comm: syz-executor.3 Not tainted 6.7.0-rc2-syzkaller-00029-g9b6de136b5f0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 ==================================================================