================================================================== BUG: KCSAN: data-race in pcpu_alloc / pcpu_free_area read-write to 0xffffffff884054dc of 4 bytes by task 17265 on cpu 1: pcpu_update_empty_pages mm/percpu.c:602 [inline] pcpu_block_update_hint_free mm/percpu.c:1044 [inline] pcpu_free_area+0x4e2/0x570 mm/percpu.c:1302 free_percpu+0x1c6/0xb30 mm/percpu.c:2303 xt_percpu_counter_free+0x63/0x80 net/netfilter/x_tables.c:1951 cleanup_entry+0x186/0x1b0 net/ipv4/netfilter/ip_tables.c:654 __do_replace+0x46e/0x570 net/ipv4/netfilter/ip_tables.c:1082 do_replace net/ipv4/netfilter/ip_tables.c:1141 [inline] do_ipt_set_ctl+0x811/0x8b0 net/ipv4/netfilter/ip_tables.c:1635 nf_setsockopt+0x195/0x1b0 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0xea/0x100 net/ipv4/ip_sockglue.c:1424 tcp_setsockopt+0x93/0xb0 net/ipv4/tcp.c:3737 sock_common_setsockopt+0x64/0x80 net/core/sock.c:3727 do_sock_setsockopt net/socket.c:2311 [inline] __sys_setsockopt+0x1d8/0x250 net/socket.c:2334 __do_sys_setsockopt net/socket.c:2343 [inline] __se_sys_setsockopt net/socket.c:2340 [inline] __x64_sys_setsockopt+0x66/0x80 net/socket.c:2340 x64_sys_call+0x1159/0x2d30 arch/x86/include/generated/asm/syscalls_64.h:55 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffffffff884054dc of 4 bytes by task 18073 on cpu 0: pcpu_alloc+0x9aa/0x10d0 mm/percpu.c:1868 __alloc_percpu_gfp+0x26/0x30 mm/percpu.c:1930 fib_nh_common_init+0x48/0x2b0 net/ipv4/fib_semantics.c:591 fib_nh_init+0x64/0x1b0 net/ipv4/fib_semantics.c:630 fib_create_info+0xa26/0x1500 net/ipv4/fib_semantics.c:1497 fib_table_insert+0x101/0xfa0 net/ipv4/fib_trie.c:1237 fib_magic+0x1a1/0x1f0 net/ipv4/fib_frontend.c:1109 fib_add_ifaddr+0x2dc/0x330 net/ipv4/fib_frontend.c:1153 fib_inetaddr_event+0xb9/0x200 net/ipv4/fib_frontend.c:1445 notifier_call_chain kernel/notifier.c:93 [inline] blocking_notifier_call_chain+0x94/0x200 kernel/notifier.c:388 __inet_insert_ifa+0x4cc/0x5e0 net/ipv4/devinet.c:556 inet_rtm_newaddr+0x8df/0xc30 net/ipv4/devinet.c:981 rtnetlink_rcv_msg+0x82e/0x8e0 net/core/rtnetlink.c:6595 netlink_rcv_skb+0x12c/0x230 net/netlink/af_netlink.c:2559 rtnetlink_rcv+0x1c/0x30 net/core/rtnetlink.c:6613 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0x58d/0x660 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x5d3/0x6e0 net/netlink/af_netlink.c:1905 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x140/0x180 net/socket.c:745 __sys_sendto+0x1e5/0x260 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [inline] __se_sys_sendto net/socket.c:2199 [inline] __x64_sys_sendto+0x78/0x90 net/socket.c:2199 x64_sys_call+0x16bb/0x2d30 arch/x86/include/generated/asm/syscalls_64.h:45 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x00000021 -> 0x00000022 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 18073 Comm: syz-executor.1 Tainted: G W 6.9.0-rc5-syzkaller-00025-ga2c63a3f3d68 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 ================================================================== veth0_vlan: entered promiscuous mode veth1_vlan: entered promiscuous mode veth0_macvtap: entered promiscuous mode veth1_macvtap: entered promiscuous mode batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: batadv0: Interface activated: batadv_slave_0 batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: batadv0: Interface activated: batadv_slave_1 netdevsim netdevsim1 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim1 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim1 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim1 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0