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BUG: KMSAN: uninit-value in __flush_smp_call_function_queue+0x343/0x1810 kernel/smp.c:549
 __flush_smp_call_function_queue+0x343/0x1810 kernel/smp.c:549
 generic_smp_call_function_single_interrupt+0x1c/0x30 kernel/smp.c:477
 __sysvec_call_function_single+0x48/0x350 arch/x86/kernel/smp.c:272
 instr_sysvec_call_function_single arch/x86/kernel/smp.c:267 [inline]
 sysvec_call_function_single+0x7c/0x90 arch/x86/kernel/smp.c:267
 asm_sysvec_call_function_single+0x1f/0x30 arch/x86/include/asm/idtentry.h:704
 __nr_to_section include/linux/mmzone.h:2065 [inline]
 __pfn_to_section include/linux/mmzone.h:2198 [inline]
 pfn_valid include/linux/mmzone.h:2280 [inline]
 kmsan_virt_addr_valid arch/x86/include/asm/kmsan.h:94 [inline]
 virt_to_page_or_null+0x9e/0x170 mm/kmsan/shadow.c:75
 kmsan_get_metadata+0xf1/0x160 mm/kmsan/shadow.c:141
 kmsan_get_shadow_origin_ptr+0x4a/0xb0 mm/kmsan/shadow.c:102
 get_shadow_origin_ptr mm/kmsan/instrumentation.c:38 [inline]
 __msan_metadata_ptr_for_load_8+0x24/0x40 mm/kmsan/instrumentation.c:94
 unwind_get_return_address+0x7e/0xe0 arch/x86/kernel/unwind_frame.c:19
 arch_stack_walk+0x14a/0x280 arch/x86/kernel/stacktrace.c:26
 stack_trace_save+0xc2/0x100 kernel/stacktrace.c:122
 kmsan_save_stack_with_flags mm/kmsan/core.c:73 [inline]
 kmsan_internal_poison_memory+0x4a/0x90 mm/kmsan/core.c:57
 kmsan_slab_alloc+0xdc/0x160 mm/kmsan/hooks.c:66
 slab_post_alloc_hook mm/slub.c:4577 [inline]
 slab_alloc_node mm/slub.c:4899 [inline]
 kmem_cache_alloc_node_noprof+0x3cd/0x12c0 mm/slub.c:4951
 __alloc_skb+0x744/0x1190 net/core/skbuff.c:702
 alloc_skb include/linux/skbuff.h:1385 [inline]
 nlmsg_new include/net/netlink.h:1055 [inline]
 inet6_netconf_notify_devconf+0x174/0x360 net/ipv6/addrconf.c:593
 __addrconf_sysctl_unregister net/ipv6/addrconf.c:7369 [inline]
 addrconf_sysctl_unregister net/ipv6/addrconf.c:7393 [inline]
 addrconf_notify+0x339/0x1cf0 net/ipv6/addrconf.c:3794
 notifier_call_chain kernel/notifier.c:85 [inline]
 raw_notifier_call_chain+0xe6/0x450 kernel/notifier.c:453
 call_netdevice_notifiers_info net/core/dev.c:2249 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:2287 [inline]
 call_netdevice_notifiers net/core/dev.c:2301 [inline]
 netif_change_name+0xa41/0x1370 net/core/dev.c:1509
 do_setlink+0x1037/0x7990 net/core/rtnetlink.c:3161
 rtnl_changelink net/core/rtnetlink.c:3800 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3973 [inline]
 rtnl_newlink+0x3148/0x3cc0 net/core/rtnetlink.c:4110
 rtnetlink_rcv_msg+0x106f/0x14b0 net/core/rtnetlink.c:6997
 netlink_rcv_skb+0x54d/0x680 net/netlink/af_netlink.c:2555
 rtnetlink_rcv+0x35/0x40 net/core/rtnetlink.c:7024
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0xee2/0x1290 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x10b2/0x1250 net/netlink/af_netlink.c:1899
 sock_sendmsg_nosec net/socket.c:787 [inline]
 __sock_sendmsg net/socket.c:802 [inline]
 __sys_sendto+0xa08/0xae0 net/socket.c:2265
 __do_sys_sendto net/socket.c:2272 [inline]
 __se_sys_sendto net/socket.c:2268 [inline]
 __x64_sys_sendto+0x130/0x200 net/socket.c:2268
 x64_sys_call+0x39a0/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:45
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15d/0x3c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Local variable prefix created at:
 record_print_text+0xca/0x8e0 kernel/printk/printk.c:1420
 printk_get_next_message+0xc7c/0x1250 kernel/printk/printk.c:3072

CPU: 0 UID: 0 PID: 6095 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
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