================================================================== BUG: KCSAN: data-race in __bpf_lru_node_move_in / bpf_lru_push_free write to 0xffff88808b0e96ca of 1 bytes by task 31580 on cpu 0: __bpf_lru_node_move_in+0x9f/0x1f0 kernel/bpf/bpf_lru_list.c:91 __local_list_flush kernel/bpf/bpf_lru_list.c:298 [inline] bpf_lru_list_pop_free_to_local kernel/bpf/bpf_lru_list.c:327 [inline] bpf_common_lru_pop_free kernel/bpf/bpf_lru_list.c:447 [inline] bpf_lru_pop_free+0x3af/0xa30 kernel/bpf/bpf_lru_list.c:499 prealloc_lru_pop+0x30/0x70 kernel/bpf/hashtab.c:237 htab_lru_map_update_elem+0x352/0x680 kernel/bpf/hashtab.c:1043 bpf_map_update_value.isra.0+0x3bc/0x420 kernel/bpf/syscall.c:203 generic_map_update_batch+0x273/0x3c0 kernel/bpf/syscall.c:1326 bpf_map_do_batch+0x194/0x3a0 kernel/bpf/syscall.c:3556 __do_sys_bpf+0x1cca/0x3100 kernel/bpf/syscall.c:3767 __se_sys_bpf kernel/bpf/syscall.c:3661 [inline] __x64_sys_bpf+0x47/0x60 kernel/bpf/syscall.c:3661 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88808b0e96ca of 1 bytes by task 31569 on cpu 1: bpf_common_lru_push_free kernel/bpf/bpf_lru_list.c:507 [inline] bpf_lru_push_free+0xf6/0x330 kernel/bpf/bpf_lru_list.c:555 htab_lru_map_update_elem+0x544/0x680 kernel/bpf/hashtab.c:1072 bpf_map_update_value.isra.0+0x3bc/0x420 kernel/bpf/syscall.c:203 generic_map_update_batch+0x273/0x3c0 kernel/bpf/syscall.c:1326 bpf_map_do_batch+0x194/0x3a0 kernel/bpf/syscall.c:3556 __do_sys_bpf+0x1cca/0x3100 kernel/bpf/syscall.c:3767 __se_sys_bpf kernel/bpf/syscall.c:3661 [inline] __x64_sys_bpf+0x47/0x60 kernel/bpf/syscall.c:3661 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 31569 Comm: syz-executor.0 Not tainted 5.7.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================