=====================================================
BUG: KMSAN: uninit-value in __mdb_fill_info+0xd9a/0xe90 net/bridge/br_mdb.c:303
 __mdb_fill_info+0xd9a/0xe90 net/bridge/br_mdb.c:303
 nlmsg_populate_mdb_fill net/bridge/br_mdb.c:438 [inline]
 br_mdb_notify+0x9ef/0x1010 net/bridge/br_mdb.c:535
 br_multicast_del_pg+0x880/0x12f0 net/bridge/br_multicast.c:817
 br_multicast_find_del_pg+0x1cb/0x220 net/bridge/br_multicast.c:850
 br_multicast_port_group_expired+0x9ec/0xd20 net/bridge/br_multicast.c:880
 call_timer_fn+0x49/0x580 kernel/time/timer.c:1789
 expire_timers kernel/time/timer.c:1840 [inline]
 __run_timers kernel/time/timer.c:2414 [inline]
 __run_timer_base+0x84e/0xe90 kernel/time/timer.c:2426
 run_timer_base kernel/time/timer.c:2435 [inline]
 run_timer_softirq+0x3a/0x70 kernel/time/timer.c:2445
 handle_softirqs+0x1a0/0x7c0 kernel/softirq.c:561
 __do_softirq kernel/softirq.c:595 [inline]
 invoke_softirq kernel/softirq.c:435 [inline]
 __irq_exit_rcu+0x68/0x180 kernel/softirq.c:662
 irq_exit_rcu+0x12/0x20 kernel/softirq.c:678
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x83/0x90 arch/x86/kernel/apic/apic.c:1049
 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702
 native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
 arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
 acpi_safe_halt+0x25/0x30 drivers/acpi/processor_idle.c:111
 acpi_idle_do_entry+0x22/0x40 drivers/acpi/processor_idle.c:568
 acpi_idle_enter+0xa1/0xc0 drivers/acpi/processor_idle.c:699
 cpuidle_enter_state+0xbf/0x230 drivers/cpuidle/cpuidle.c:268
 cpuidle_enter+0x7f/0xf0 drivers/cpuidle/cpuidle.c:389
 call_cpuidle kernel/sched/idle.c:155 [inline]
 cpuidle_idle_call kernel/sched/idle.c:230 [inline]
 do_idle+0x543/0x740 kernel/sched/idle.c:325
 cpu_startup_entry+0x65/0x80 kernel/sched/idle.c:423
 rest_init+0x1e8/0x260 init/main.c:743
 start_kernel+0x944/0xa80 init/main.c:1099
 x86_64_start_reservations+0x2e/0x30 arch/x86/kernel/head64.c:515
 x86_64_start_kernel+0x9e/0xa0 arch/x86/kernel/head64.c:496
 common_startup_64+0x12c/0x137

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4121 [inline]
 slab_alloc_node mm/slub.c:4164 [inline]
 __do_kmalloc_node mm/slub.c:4293 [inline]
 __kmalloc_node_track_caller_noprof+0x945/0x1240 mm/slub.c:4313
 kmemdup_noprof+0x48/0xc0 mm/util.c:135
 neigh_parms_alloc+0x8e/0x960 net/core/neighbour.c:1667
 ipv6_add_dev+0x482/0x1c20 net/ipv6/addrconf.c:399
 addrconf_notify+0x7c9/0x1c40 net/ipv6/addrconf.c:3646
 notifier_call_chain kernel/notifier.c:85 [inline]
 raw_notifier_call_chain+0xe8/0x440 kernel/notifier.c:453
 call_netdevice_notifiers_info+0x1be/0x2b0 net/core/dev.c:2141
 call_netdevice_notifiers_extack net/core/dev.c:2179 [inline]
 call_netdevice_notifiers net/core/dev.c:2193 [inline]
 register_netdevice+0x2124/0x22f0 net/core/dev.c:10915
 veth_newlink+0x98c/0x1310 drivers/net/veth.c:1844
 rtnl_newlink_create+0x3a9/0x11a0 net/core/rtnetlink.c:3795
 __rtnl_newlink net/core/rtnetlink.c:3906 [inline]
 rtnl_newlink+0x290b/0x3850 net/core/rtnetlink.c:4021
 rtnetlink_rcv_msg+0x1061/0x1410 net/core/rtnetlink.c:6911
 netlink_rcv_skb+0x375/0x650 net/netlink/af_netlink.c:2543
 rtnetlink_rcv+0x34/0x40 net/core/rtnetlink.c:6938
 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
 netlink_unicast+0xf52/0x1260 net/netlink/af_netlink.c:1348
 netlink_sendmsg+0x10da/0x11e0 net/netlink/af_netlink.c:1892
 sock_sendmsg_nosec net/socket.c:713 [inline]
 __sock_sendmsg+0x30f/0x380 net/socket.c:728
 __sys_sendto+0x594/0x750 net/socket.c:2182
 __do_sys_sendto net/socket.c:2189 [inline]
 __se_sys_sendto net/socket.c:2185 [inline]
 __x64_sys_sendto+0x125/0x1d0 net/socket.c:2185
 x64_sys_call+0x346a/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:45
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.13.0-syzkaller-08997-gf34b580514c9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
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