=====================================================
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_load_1+0x24/0x40 mm/kmsan/instrumentation.c:91
 __scm_recv_common+0x6f/0x910 net/core/scm.c:-1
 scm_recv_unix+0x5e/0x580 net/core/scm.c:545
 __unix_dgram_recvmsg+0x14e1/0x1750 net/unix/af_unix.c:2666
 unix_dgram_recvmsg+0x112/0x180 net/unix/af_unix.c:2686
 sock_recvmsg_nosec+0x1e2/0x270 net/socket.c:1138
 ____sys_recvmsg+0x4e5/0x620 net/socket.c:2917
 ___sys_recvmsg+0x20b/0x850 net/socket.c:2961
 do_recvmmsg+0x40e/0xdf0 net/socket.c:3056
 __sys_recvmmsg net/socket.c:3130 [inline]
 __do_sys_recvmmsg net/socket.c:3153 [inline]
 __se_sys_recvmmsg net/socket.c:3146 [inline]
 __x64_sys_recvmmsg+0x383/0x500 net/socket.c:3146
 x64_sys_call+0x96d/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:300
 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 tmp created at:
 number+0x83/0x2190 lib/vsprintf.c:470
 vsnprintf+0xd0d/0x1b00 lib/vsprintf.c:2912

CPU: 1 UID: 0 PID: 12724 Comm: syz.8.1050 Tainted: G             L      syzkaller #0 PREEMPT(lazy) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
=====================================================