================================================================== BUG: KCSAN: data-race in __bpf_lru_list_rotate / __htab_lru_percpu_map_update_elem write to 0xffff888108147f63 of 1 bytes by task 8752 on cpu 1: __bpf_lru_node_move kernel/bpf/bpf_lru_list.c:113 [inline] __bpf_lru_list_rotate_inactive kernel/bpf/bpf_lru_list.c:191 [inline] __bpf_lru_list_rotate+0x5e5/0x750 kernel/bpf/bpf_lru_list.c:242 bpf_percpu_lru_pop_free kernel/bpf/bpf_lru_list.c:412 [inline] bpf_lru_pop_free+0x8b/0xe20 kernel/bpf/bpf_lru_list.c:497 prealloc_lru_pop kernel/bpf/hashtab.c:301 [inline] __htab_lru_percpu_map_update_elem+0xf5/0x560 kernel/bpf/hashtab.c:1335 bpf_percpu_hash_update+0x5e/0x90 kernel/bpf/hashtab.c:2372 bpf_map_update_value+0x2ae/0x370 kernel/bpf/syscall.c:204 generic_map_update_batch+0x3ae/0x4f0 kernel/bpf/syscall.c:1702 bpf_map_do_batch+0x2d9/0x3d0 kernel/bpf/syscall.c:4559 __sys_bpf+0x317/0x800 __do_sys_bpf kernel/bpf/syscall.c:5162 [inline] __se_sys_bpf kernel/bpf/syscall.c:5160 [inline] __x64_sys_bpf+0x43/0x50 kernel/bpf/syscall.c:5160 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd read to 0xffff888108147f63 of 1 bytes by task 8754 on cpu 0: bpf_lru_node_set_ref kernel/bpf/bpf_lru_list.h:70 [inline] __htab_lru_percpu_map_update_elem+0x2fe/0x560 kernel/bpf/hashtab.c:1351 bpf_percpu_hash_update+0x5e/0x90 kernel/bpf/hashtab.c:2372 bpf_map_update_value+0x2ae/0x370 kernel/bpf/syscall.c:204 generic_map_update_batch+0x3ae/0x4f0 kernel/bpf/syscall.c:1702 bpf_map_do_batch+0x2d9/0x3d0 kernel/bpf/syscall.c:4559 __sys_bpf+0x317/0x800 __do_sys_bpf kernel/bpf/syscall.c:5162 [inline] __se_sys_bpf kernel/bpf/syscall.c:5160 [inline] __x64_sys_bpf+0x43/0x50 kernel/bpf/syscall.c:5160 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0x01 -> 0x00 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 8754 Comm: syz-executor.1 Not tainted 6.4.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 ==================================================================