================================================================== BUG: KCSAN: data-race in bpf_obj_memcpy / bpf_obj_memcpy write to 0xffff8881269c6018 of 4866 bytes by task 16286 on cpu 0: bpf_obj_memcpy+0x16a/0x190 include/linux/bpf.h:-1 copy_map_value include/linux/bpf.h:591 [inline] rhtab_map_update_existing kernel/bpf/hashtab.c:3010 [inline] rhtab_map_update_elem+0xec/0xf40 kernel/bpf/hashtab.c:3039 bpf_map_update_value+0x4ee/0x570 kernel/bpf/syscall.c:297 generic_map_update_batch+0x4eb/0x710 kernel/bpf/syscall.c:2106 bpf_map_do_batch+0x25b/0x380 kernel/bpf/syscall.c:5781 __sys_bpf+0xa8e/0xc30 kernel/bpf/syscall.c:-1 __do_sys_bpf kernel/bpf/syscall.c:6486 [inline] __se_sys_bpf kernel/bpf/syscall.c:6483 [inline] __x64_sys_bpf+0x69/0x80 kernel/bpf/syscall.c:6483 x64_sys_call+0xf26/0x2550 arch/x86/include/generated/asm/syscalls_64.h:322 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f write to 0xffff8881269c6018 of 4866 bytes by task 16290 on cpu 1: bpf_obj_memcpy+0x16a/0x190 include/linux/bpf.h:-1 copy_map_value include/linux/bpf.h:591 [inline] rhtab_map_update_existing kernel/bpf/hashtab.c:3010 [inline] rhtab_map_update_elem+0xec/0xf40 kernel/bpf/hashtab.c:3039 bpf_map_update_value+0x4ee/0x570 kernel/bpf/syscall.c:297 generic_map_update_batch+0x4eb/0x710 kernel/bpf/syscall.c:2106 bpf_map_do_batch+0x25b/0x380 kernel/bpf/syscall.c:5781 __sys_bpf+0xa8e/0xc30 kernel/bpf/syscall.c:-1 __do_sys_bpf kernel/bpf/syscall.c:6486 [inline] __se_sys_bpf kernel/bpf/syscall.c:6483 [inline] __x64_sys_bpf+0x69/0x80 kernel/bpf/syscall.c:6483 x64_sys_call+0xf26/0x2550 arch/x86/include/generated/asm/syscalls_64.h:322 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 16290 Comm: syz.9.4010 Not tainted syzkaller #0 PREEMPT(lazy) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/08/2026 ==================================================================