================================================================== BUG: KCSAN: data-race in bpf_lru_pop_free / htab_lru_map_update_elem write to 0xffff8881283e9a23 of 1 bytes by task 22718 on cpu 1: bpf_lru_node_set_ref kernel/bpf/bpf_lru_list.h:71 [inline] htab_lru_map_update_elem+0x48a/0x870 kernel/bpf/hashtab.c:1195 bpf_map_update_value+0x1b9/0x2f0 kernel/bpf/syscall.c:226 generic_map_update_batch+0x36e/0x4d0 kernel/bpf/syscall.c:1637 bpf_map_do_batch+0x373/0x3d0 __sys_bpf+0x5b7/0x630 __do_sys_bpf kernel/bpf/syscall.c:5021 [inline] __se_sys_bpf kernel/bpf/syscall.c:5019 [inline] __x64_sys_bpf+0x3f/0x50 kernel/bpf/syscall.c:5019 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+0x46/0xb0 read to 0xffff8881283e9a23 of 1 bytes by task 22731 on cpu 0: 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+0xa19/0xe90 kernel/bpf/bpf_lru_list.c:499 prealloc_lru_pop kernel/bpf/hashtab.c:310 [inline] htab_lru_map_update_elem+0xb7/0x870 kernel/bpf/hashtab.c:1174 bpf_map_update_value+0x1b9/0x2f0 kernel/bpf/syscall.c:226 generic_map_update_batch+0x36e/0x4d0 kernel/bpf/syscall.c:1637 bpf_map_do_batch+0x373/0x3d0 __sys_bpf+0x5b7/0x630 __do_sys_bpf kernel/bpf/syscall.c:5021 [inline] __se_sys_bpf kernel/bpf/syscall.c:5019 [inline] __x64_sys_bpf+0x3f/0x50 kernel/bpf/syscall.c:5019 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+0x46/0xb0 value changed: 0x00 -> 0x01 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 22731 Comm: syz-executor.5 Not tainted 5.19.0-rc1-syzkaller-00262-g0885eacdc81f-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================