================================================================== BUG: KCSAN: data-race in __bpf_lru_list_rotate / __htab_lru_percpu_map_update_elem write to 0xffff8881404b2a63 of 1 bytes by task 13888 on cpu 0: bpf_lru_node_set_ref kernel/bpf/bpf_lru_list.h:71 [inline] __htab_lru_percpu_map_update_elem+0x3aa/0x800 kernel/bpf/hashtab.c:1340 bpf_percpu_hash_update+0x5a/0x90 kernel/bpf/hashtab.c:2324 bpf_map_update_value+0x1dd/0x2f0 kernel/bpf/syscall.c:200 generic_map_update_batch+0x37e/0x4e0 kernel/bpf/syscall.c:1656 bpf_map_do_batch+0x373/0x3d0 __sys_bpf+0x5d8/0x630 __do_sys_bpf kernel/bpf/syscall.c:5069 [inline] __se_sys_bpf kernel/bpf/syscall.c:5067 [inline] __x64_sys_bpf+0x3f/0x50 kernel/bpf/syscall.c:5067 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+0x63/0xcd read to 0xffff8881404b2a63 of 1 bytes by task 13881 on cpu 1: bpf_lru_node_is_ref kernel/bpf/bpf_lru_list.c:44 [inline] __bpf_lru_list_rotate_inactive kernel/bpf/bpf_lru_list.c:190 [inline] __bpf_lru_list_rotate+0x55f/0x7b0 kernel/bpf/bpf_lru_list.c:242 bpf_percpu_lru_pop_free kernel/bpf/bpf_lru_list.c:412 [inline] bpf_lru_pop_free+0x87/0xe70 kernel/bpf/bpf_lru_list.c:497 prealloc_lru_pop kernel/bpf/hashtab.c:293 [inline] __htab_lru_percpu_map_update_elem+0xd7/0x800 kernel/bpf/hashtab.c:1324 bpf_percpu_hash_update+0x5a/0x90 kernel/bpf/hashtab.c:2324 bpf_map_update_value+0x1dd/0x2f0 kernel/bpf/syscall.c:200 generic_map_update_batch+0x37e/0x4e0 kernel/bpf/syscall.c:1656 bpf_map_do_batch+0x373/0x3d0 __sys_bpf+0x5d8/0x630 __do_sys_bpf kernel/bpf/syscall.c:5069 [inline] __se_sys_bpf kernel/bpf/syscall.c:5067 [inline] __x64_sys_bpf+0x3f/0x50 kernel/bpf/syscall.c:5067 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+0x63/0xcd value changed: 0x00 -> 0x01 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 13881 Comm: syz-executor.5 Tainted: G W 6.1.0-rc4-syzkaller-00362-gfef7fd48922d-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 ==================================================================