syzbot

==================================================================
BUG: KCSAN: data-race in __htab_lru_percpu_map_update_elem / bpf_lru_pop_free

write to 0xffff888133d294e3 of 1 bytes by task 11245 on cpu 0:
 __bpf_lru_node_move_in kernel/bpf/bpf_lru_list.c:92 [inline]
 __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+0x321/0xef0 kernel/bpf/bpf_lru_list.c:499
 prealloc_lru_pop kernel/bpf/hashtab.c:290 [inline]
 __htab_lru_percpu_map_update_elem+0xeb/0x880 kernel/bpf/hashtab.c:1275
 bpf_percpu_hash_update+0x5a/0x90 kernel/bpf/hashtab.c:2216
 bpf_map_update_value+0x1dd/0x2f0 kernel/bpf/syscall.c:197
 generic_map_update_batch+0x364/0x4c0 kernel/bpf/syscall.c:1411
 bpf_map_do_batch+0x33e/0x3a0
 __sys_bpf+0x9b4/0xa3c0
 __do_sys_bpf kernel/bpf/syscall.c:4741 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4739 [inline]
 __x64_sys_bpf+0x3f/0x50 kernel/bpf/syscall.c:4739
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888133d294e3 of 1 bytes by task 11233 on cpu 1:
 bpf_lru_node_set_ref kernel/bpf/bpf_lru_list.h:69 [inline]
 __htab_lru_percpu_map_update_elem+0x468/0x880 kernel/bpf/hashtab.c:1291
 bpf_percpu_hash_update+0x5a/0x90 kernel/bpf/hashtab.c:2216
 bpf_map_update_value+0x1dd/0x2f0 kernel/bpf/syscall.c:197
 generic_map_update_batch+0x364/0x4c0 kernel/bpf/syscall.c:1411
 bpf_map_do_batch+0x33e/0x3a0
 __sys_bpf+0x9b4/0xa3c0
 __do_sys_bpf kernel/bpf/syscall.c:4741 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4739 [inline]
 __x64_sys_bpf+0x3f/0x50 kernel/bpf/syscall.c:4739
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x01 -> 0x00

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 11233 Comm: syz-executor.0 Not tainted 5.17.0-rc7-syzkaller-00020-gea4424be1688-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
==================================================================
BUG: KCSAN: data-race in __htab_lru_percpu_map_update_elem / bpf_lru_pop_free

read to 0xffff888133d294a3 of 1 bytes by task 11245 on cpu 0:
 bpf_lru_node_set_ref kernel/bpf/bpf_lru_list.h:69 [inline]
 __htab_lru_percpu_map_update_elem+0x468/0x880 kernel/bpf/hashtab.c:1291
 bpf_percpu_hash_update+0x5a/0x90 kernel/bpf/hashtab.c:2216
 bpf_map_update_value+0x1dd/0x2f0 kernel/bpf/syscall.c:197
 generic_map_update_batch+0x364/0x4c0 kernel/bpf/syscall.c:1411
 bpf_map_do_batch+0x33e/0x3a0
 __sys_bpf+0x9b4/0xa3c0
 __do_sys_bpf kernel/bpf/syscall.c:4741 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4739 [inline]
 __x64_sys_bpf+0x3f/0x50 kernel/bpf/syscall.c:4739
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

write to 0xffff888133d294a3 of 1 bytes by task 11233 on cpu 1:
 __bpf_lru_node_move_in kernel/bpf/bpf_lru_list.c:92 [inline]
 __local_list_flush kernel/bpf/bpf_lru_list.c:300 [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+0x3aa/0xef0 kernel/bpf/bpf_lru_list.c:499
 prealloc_lru_pop kernel/bpf/hashtab.c:290 [inline]
 __htab_lru_percpu_map_update_elem+0xeb/0x880 kernel/bpf/hashtab.c:1275
 bpf_percpu_hash_update+0x5a/0x90 kernel/bpf/hashtab.c:2216
 bpf_map_update_value+0x1dd/0x2f0 kernel/bpf/syscall.c:197
 generic_map_update_batch+0x364/0x4c0 kernel/bpf/syscall.c:1411
 bpf_map_do_batch+0x33e/0x3a0
 __sys_bpf+0x9b4/0xa3c0
 __do_sys_bpf kernel/bpf/syscall.c:4741 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4739 [inline]
 __x64_sys_bpf+0x3f/0x50 kernel/bpf/syscall.c:4739
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x00 -> 0x01

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 11233 Comm: syz-executor.0 Not tainted 5.17.0-rc7-syzkaller-00020-gea4424be1688-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================