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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
 __preempt_count_add arch/x86/include/asm/preempt.h:80 [inline]
 kmsan_virt_addr_valid arch/x86/include/asm/kmsan.h:93 [inline]
 virt_to_page_or_null+0x51/0x170 mm/kmsan/shadow.c:75
 kmsan_get_metadata+0xf1/0x160 mm/kmsan/shadow.c:141
 kmsan_get_shadow_origin_ptr+0x35/0xb0 mm/kmsan/shadow.c:97
 get_shadow_origin_ptr mm/kmsan/instrumentation.c:38 [inline]
 __msan_metadata_ptr_for_store_8+0x27/0x40 mm/kmsan/instrumentation.c:94
 update_stack_state+0x180/0x1c0 arch/x86/kernel/unwind_frame.c:-1
 unwind_next_frame+0x116/0x350 arch/x86/kernel/unwind_frame.c:315
 arch_stack_walk+0x1b0/0x280 arch/x86/kernel/stacktrace.c:25
 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_free+0xce/0x140 mm/kmsan/hooks.c:87
 slab_free_hook mm/slub.c:2615 [inline]
 slab_free mm/slub.c:6251 [inline]
 kmem_cache_free+0x254/0xea0 mm/slub.c:6378
 kfree_skbmem net/core/skbuff.c:-1 [inline]
 __kfree_skb+0x20b/0x260 net/core/skbuff.c:1204
 consume_skb+0x86/0x260 net/core/skbuff.c:1436
 netlink_broadcast_filtered+0x2775/0x2930 net/netlink/af_netlink.c:1540
 nlmsg_multicast_filtered include/net/netlink.h:1165 [inline]
 nlmsg_multicast include/net/netlink.h:1184 [inline]
 nlmsg_notify+0x15b/0x2f0 net/netlink/af_netlink.c:2598
 rtnl_notify+0xba/0x100 net/core/rtnetlink.c:964
 inet6_rt_notify+0x458/0x5a0 net/ipv6/route.c:6388
 fib6_add_rt2node+0x25ce/0x4d90 net/ipv6/ip6_fib.c:1291
 fib6_add+0x10bc/0x2c50 net/ipv6/ip6_fib.c:1536
 __ip6_ins_rt net/ipv6/route.c:1355 [inline]
 ip6_ins_rt+0xc0/0x170 net/ipv6/route.c:1365
 __ipv6_ifa_notify+0x7c9/0x1930 net/ipv6/addrconf.c:6297
 ipv6_ifa_notify net/ipv6/addrconf.c:6336 [inline]
 add_addr+0x301/0x4c0 net/ipv6/addrconf.c:3209
 add_v4_addrs+0xa9e/0x11d0 net/ipv6/addrconf.c:3265
 addrconf_sit_config net/ipv6/addrconf.c:3523 [inline]
 addrconf_init_auto_addrs+0xd77/0x1250 net/ipv6/addrconf.c:3561
 addrconf_notify+0xb28/0x1cf0 net/ipv6/addrconf.c:3754
 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]
 __dev_notify_flags+0x406/0x890 net/core/dev.c:-1
 netif_change_flags+0x162/0x1e0 net/core/dev.c:9826
 do_setlink+0x15ac/0x7990 net/core/rtnetlink.c:3181
 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:2266
 __do_sys_sendto net/socket.c:2273 [inline]
 __se_sys_sendto net/socket.c:2269 [inline]
 __x64_sys_sendto+0x130/0x200 net/socket.c:2269
 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 plug created at:
 __submit_bio+0x40/0xc70 block/blk-core.c:630
 __submit_bio_noacct_mq block/blk-core.c:722 [inline]
 submit_bio_noacct_nocheck+0x325/0x1180 block/blk-core.c:753

CPU: 0 UID: 0 PID: 11979 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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