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BUG: KCSAN: data-race in __htab_map_lookup_elem / bpf_lru_pop_free

write to 0xffff88811ac0a828 of 4 bytes by task 10255 on cpu 0:
 __local_list_add_pending kernel/bpf/bpf_lru_list.c:350 [inline]
 bpf_common_lru_pop_free kernel/bpf/bpf_lru_list.c:449 [inline]
 bpf_lru_pop_free+0xbea/0xcc0 kernel/bpf/bpf_lru_list.c:496
 prealloc_lru_pop kernel/bpf/hashtab.c:299 [inline]
 __htab_lru_percpu_map_update_elem+0xea/0x630 kernel/bpf/hashtab.c:1346
 bpf_percpu_hash_update+0x61/0xa0 kernel/bpf/hashtab.c:2400
 bpf_map_update_value+0x36b/0x570 kernel/bpf/syscall.c:270
 generic_map_update_batch+0x3eb/0x540 kernel/bpf/syscall.c:2038
 bpf_map_do_batch+0x25c/0x380 kernel/bpf/syscall.c:5647
 __sys_bpf+0x5f8/0x7c0 kernel/bpf/syscall.c:-1
 __do_sys_bpf kernel/bpf/syscall.c:6274 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6272 [inline]
 __x64_sys_bpf+0x41/0x50 kernel/bpf/syscall.c:6272
 x64_sys_call+0x28e1/0x3000 arch/x86/include/generated/asm/syscalls_64.h:322
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xca/0x2b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff88811ac0a828 of 4 bytes by task 10195 on cpu 1:
 lookup_nulls_elem_raw kernel/bpf/hashtab.c:639 [inline]
 __htab_map_lookup_elem+0xab/0x150 kernel/bpf/hashtab.c:668
 htab_lru_percpu_map_lookup_elem+0x20/0xb0 kernel/bpf/hashtab.c:2334
 bpf_prog_1908f35e458ae2da+0x48/0x50
 bpf_dispatcher_nop_func include/linux/bpf.h:1378 [inline]
 __bpf_prog_run include/linux/filter.h:723 [inline]
 bpf_prog_run include/linux/filter.h:730 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2075 [inline]
 bpf_trace_run2+0x107/0x1d0 kernel/trace/bpf_trace.c:2116
 __do_trace_kfree include/trace/events/kmem.h:97 [inline]
 trace_kfree include/trace/events/kmem.h:97 [inline]
 kfree+0x353/0x3c0 mm/slub.c:6865
 kfree_const+0x3e/0x50 mm/util.c:46
 kobject_set_name_vargs+0xb8/0xe0 lib/kobject.c:293
 kobject_add_varg lib/kobject.c:368 [inline]
 kobject_init_and_add+0x11f/0x1f0 lib/kobject.c:457
 rx_queue_add_kobject net/core/net-sysfs.c:1260 [inline]
 net_rx_queue_update_kobjects+0x18d/0x540 net/core/net-sysfs.c:1322
 register_queue_kobjects net/core/net-sysfs.c:2114 [inline]
 netdev_register_kobject+0x17a/0x220 net/core/net-sysfs.c:2362
 register_netdevice+0x8cf/0xdd0 net/core/dev.c:11393
 bond_newlink+0x2f/0xb0 drivers/net/bonding/bond_netlink.c:601
 rtnl_newlink_create+0x1bc/0x620 net/core/rtnetlink.c:3840
 __rtnl_newlink net/core/rtnetlink.c:3957 [inline]
 rtnl_newlink+0xf5b/0x1360 net/core/rtnetlink.c:4072
 rtnetlink_rcv_msg+0x5fe/0x6d0 net/core/rtnetlink.c:6958
 netlink_rcv_skb+0x123/0x220 net/netlink/af_netlink.c:2550
 rtnetlink_rcv+0x1c/0x30 net/core/rtnetlink.c:6985
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x5c0/0x690 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x58b/0x6b0 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg+0x145/0x180 net/socket.c:742
 __sys_sendto+0x268/0x330 net/socket.c:2206
 __do_sys_sendto net/socket.c:2213 [inline]
 __se_sys_sendto net/socket.c:2209 [inline]
 __x64_sys_sendto+0x76/0x90 net/socket.c:2209
 x64_sys_call+0x29a7/0x3000 arch/x86/include/generated/asm/syscalls_64.h:45
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xca/0x2b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x65ccb241 -> 0x28a375d8

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 10195 Comm: syz-executor Tainted: G        W           syzkaller #0 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
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chnl_net:caif_netlink_parms(): no params data found