================================================================== BUG: KCSAN: data-race in bpf_lru_pop_free / htab_lru_map_update_elem write to 0xffff88815dec3023 of 1 bytes by task 14911 on cpu 0: bpf_lru_node_set_ref kernel/bpf/bpf_lru_list.h:71 [inline] htab_lru_map_update_elem+0x49a/0x650 kernel/bpf/hashtab.c:1231 bpf_map_update_value+0x318/0x370 kernel/bpf/syscall.c:230 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 0xffff88815dec3023 of 1 bytes by task 14910 on cpu 1: bpf_lru_node_is_ref kernel/bpf/bpf_lru_list.c:44 [inline] __local_list_pop_pending kernel/bpf/bpf_lru_list.c:384 [inline] bpf_common_lru_pop_free kernel/bpf/bpf_lru_list.c:476 [inline] bpf_lru_pop_free+0x9a7/0xe20 kernel/bpf/bpf_lru_list.c:499 prealloc_lru_pop kernel/bpf/hashtab.c:301 [inline] htab_lru_map_update_elem+0xb4/0x650 kernel/bpf/hashtab.c:1210 bpf_map_update_value+0x318/0x370 kernel/bpf/syscall.c:230 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: 1 PID: 14910 Comm: syz-executor.4 Not tainted 6.4.0-rc5-syzkaller-00016-ga4d7d7011219 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 ==================================================================