netdevsim netdevsim2 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
netdevsim netdevsim2 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
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BUG: KCSAN: data-race in pcpu_alloc_noprof / pcpu_free_area

read-write to 0xffffffff88bdf3ac of 4 bytes by task 11 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+0x4dc/0x570 mm/percpu.c:1302
 free_percpu+0x1c6/0xb30 mm/percpu.c:2246
 xt_percpu_counter_free+0x63/0x80 net/netfilter/x_tables.c:1951
 cleanup_entry+0x195/0x1c0 net/ipv6/netfilter/ip6_tables.c:671
 __ip6t_unregister_table net/ipv6/netfilter/ip6_tables.c:1726 [inline]
 ip6t_unregister_table_exit+0x77/0x120 net/ipv6/netfilter/ip6_tables.c:1811
 ip6table_filter_net_exit+0x1c/0x30 net/ipv6/netfilter/ip6table_filter.c:68
 ops_exit_list net/core/net_namespace.c:173 [inline]
 cleanup_net+0x475/0x810 net/core/net_namespace.c:626
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0x483/0x9a0 kernel/workqueue.c:3310
 worker_thread+0x51d/0x6f0 kernel/workqueue.c:3391
 kthread+0x1d1/0x210 kernel/kthread.c:389
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

read to 0xffffffff88bdf3ac of 4 bytes by task 4425 on cpu 0:
 pcpu_alloc_noprof+0x9b6/0x10a0 mm/percpu.c:1894
 alloc_vfsmnt+0xfe/0x300 fs/namespace.c:326
 clone_mnt+0x45/0x7a0 fs/namespace.c:1292
 copy_tree+0x2df/0x7f0 fs/namespace.c:2161
 __do_loopback+0x111/0x210 fs/namespace.c:2742
 do_loopback+0x1dd/0x2d0 fs/namespace.c:2782
 path_mount+0x3d0/0xb30 fs/namespace.c:3828
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4055 [inline]
 __se_sys_mount+0x27c/0x2d0 fs/namespace.c:4032
 __x64_sys_mount+0x67/0x80 fs/namespace.c:4032
 x64_sys_call+0x203e/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000011 -> 0x00000012

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 4425 Comm: syz-executor Tainted: G        W          6.12.0-rc3-syzkaller-00403-gf9e4825524aa #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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