================================================================== BUG: KCSAN: data-race in __bpf_lru_list_rotate / __htab_lru_percpu_map_update_elem read to 0xffff888107f3af23 of 1 bytes by task 17490 on cpu 1: bpf_lru_node_set_ref kernel/bpf/bpf_lru_list.h:70 [inline] __htab_lru_percpu_map_update_elem+0x2fe/0x540 kernel/bpf/hashtab.c:1350 bpf_percpu_hash_update+0x5e/0x90 kernel/bpf/hashtab.c:2370 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 write to 0xffff888107f3af23 of 1 bytes by task 17482 on cpu 0: __bpf_lru_node_move kernel/bpf/bpf_lru_list.c:113 [inline] __bpf_lru_list_rotate_active kernel/bpf/bpf_lru_list.c:151 [inline] __bpf_lru_list_rotate+0x2fe/0x750 kernel/bpf/bpf_lru_list.c:240 bpf_lru_list_pop_free_to_local kernel/bpf/bpf_lru_list.c:329 [inline] bpf_common_lru_pop_free kernel/bpf/bpf_lru_list.c:447 [inline] bpf_lru_pop_free+0x638/0xe20 kernel/bpf/bpf_lru_list.c:499 prealloc_lru_pop kernel/bpf/hashtab.c:301 [inline] __htab_lru_percpu_map_update_elem+0xf5/0x540 kernel/bpf/hashtab.c:1334 bpf_percpu_hash_update+0x5e/0x90 kernel/bpf/hashtab.c:2370 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: 0x00 -> 0x01 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 17482 Comm: syz-executor.1 Tainted: G W 6.3.0-syzkaller-13027-g1a5304fecee5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 ==================================================================