================================================================== BUG: KCSAN: data-race in __bpf_lru_list_rotate / __htab_lru_percpu_map_update_elem write to 0xffff88812a074263 of 1 bytes by task 7959 on cpu 1: __bpf_lru_node_move kernel/bpf/bpf_lru_list.c:113 [inline] __bpf_lru_list_rotate_active kernel/bpf/bpf_lru_list.c:149 [inline] __bpf_lru_list_rotate+0x1d3/0x7b0 kernel/bpf/bpf_lru_list.c:240 bpf_percpu_lru_pop_free kernel/bpf/bpf_lru_list.c:412 [inline] bpf_lru_pop_free+0x8a/0xf00 kernel/bpf/bpf_lru_list.c:497 prealloc_lru_pop kernel/bpf/hashtab.c:310 [inline] __htab_lru_percpu_map_update_elem+0xdb/0x7f0 kernel/bpf/hashtab.c:1294 bpf_percpu_hash_update+0x5a/0x90 kernel/bpf/hashtab.c:2282 bpf_map_update_value+0x1dd/0x2f0 kernel/bpf/syscall.c:200 generic_map_update_batch+0x36e/0x4d0 kernel/bpf/syscall.c:1657 bpf_map_do_batch+0x373/0x3d0 __sys_bpf+0x5d4/0x620 __do_sys_bpf kernel/bpf/syscall.c:5057 [inline] __se_sys_bpf kernel/bpf/syscall.c:5055 [inline] __x64_sys_bpf+0x3f/0x50 kernel/bpf/syscall.c:5055 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+0x63/0xcd read to 0xffff88812a074263 of 1 bytes by task 7944 on cpu 0: bpf_lru_node_set_ref kernel/bpf/bpf_lru_list.h:70 [inline] __htab_lru_percpu_map_update_elem+0x2d4/0x7f0 kernel/bpf/hashtab.c:1310 bpf_percpu_hash_update+0x5a/0x90 kernel/bpf/hashtab.c:2282 bpf_map_update_value+0x1dd/0x2f0 kernel/bpf/syscall.c:200 generic_map_update_batch+0x36e/0x4d0 kernel/bpf/syscall.c:1657 bpf_map_do_batch+0x373/0x3d0 __sys_bpf+0x5d4/0x620 __do_sys_bpf kernel/bpf/syscall.c:5057 [inline] __se_sys_bpf kernel/bpf/syscall.c:5055 [inline] __x64_sys_bpf+0x3f/0x50 kernel/bpf/syscall.c:5055 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+0x63/0xcd value changed: 0x01 -> 0x00 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 7944 Comm: syz-executor.3 Not tainted 6.0.0-rc1-syzkaller-00340-g50cd95ac4654-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 ==================================================================