================================================================== BUG: KCSAN: data-race in __bpf_lru_list_rotate / bpf_lru_push_free write to 0xffff8881056adc6a of 1 bytes by task 5115 on cpu 0: __bpf_lru_node_move kernel/bpf/bpf_lru_list.c:108 [inline] __bpf_lru_list_rotate_active kernel/bpf/bpf_lru_list.c:148 [inline] __bpf_lru_list_rotate+0x2ec/0x780 kernel/bpf/bpf_lru_list.c:237 bpf_lru_list_pop_free_to_local kernel/bpf/bpf_lru_list.c:326 [inline] bpf_common_lru_pop_free kernel/bpf/bpf_lru_list.c:444 [inline] bpf_lru_pop_free+0x640/0xe40 kernel/bpf/bpf_lru_list.c:496 prealloc_lru_pop kernel/bpf/hashtab.c:299 [inline] htab_lru_map_update_elem+0xc6/0x700 kernel/bpf/hashtab.c:1215 bpf_map_update_value+0x4f3/0x570 kernel/bpf/syscall.c:294 generic_map_update_batch+0x3eb/0x540 kernel/bpf/syscall.c:2038 bpf_map_do_batch+0x25c/0x380 kernel/bpf/syscall.c:5647 __sys_bpf+0x5f8/0x7b0 kernel/bpf/syscall.c:-1 __do_sys_bpf kernel/bpf/syscall.c:6274 [inline] __se_sys_bpf kernel/bpf/syscall.c:6272 [inline] __x64_sys_bpf+0x41/0x50 kernel/bpf/syscall.c:6272 x64_sys_call+0x28e1/0x3000 arch/x86/include/generated/asm/syscalls_64.h:322 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xc0/0x2a0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff8881056adc6a of 1 bytes by task 5114 on cpu 1: bpf_lru_list_push_free kernel/bpf/bpf_lru_list.c:307 [inline] bpf_common_lru_push_free kernel/bpf/bpf_lru_list.c:530 [inline] bpf_lru_push_free+0x578/0x590 kernel/bpf/bpf_lru_list.c:553 htab_lru_push_free kernel/bpf/hashtab.c:1183 [inline] htab_lru_map_update_elem+0x5a4/0x700 kernel/bpf/hashtab.c:1247 bpf_map_update_value+0x4f3/0x570 kernel/bpf/syscall.c:294 generic_map_update_batch+0x3eb/0x540 kernel/bpf/syscall.c:2038 bpf_map_do_batch+0x25c/0x380 kernel/bpf/syscall.c:5647 __sys_bpf+0x5f8/0x7b0 kernel/bpf/syscall.c:-1 __do_sys_bpf kernel/bpf/syscall.c:6274 [inline] __se_sys_bpf kernel/bpf/syscall.c:6272 [inline] __x64_sys_bpf+0x41/0x50 kernel/bpf/syscall.c:6272 x64_sys_call+0x28e1/0x3000 arch/x86/include/generated/asm/syscalls_64.h:322 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xc0/0x2a0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x00 -> 0x01 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 5114 Comm: syz.0.477 Not tainted syzkaller #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 ==================================================================