=====================================================
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_dec_and_test arch/x86/include/asm/preempt.h:95 [inline]
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline]
 _raw_spin_unlock_irqrestore+0x33/0x60 kernel/locking/spinlock.c:198
 spin_unlock_irqrestore include/linux/spinlock.h:408 [inline]
 __wake_up_common_lock kernel/sched/wait.c:127 [inline]
 __wake_up_sync_key+0x283/0x2b0 kernel/sched/wait.c:192
 __unix_dgram_recvmsg+0x847/0x1750 net/unix/af_unix.c:2612
 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 rf created at:
 __schedule+0x3a/0x8750 kernel/sched/core.c:7028
 preempt_schedule_irq+0x50/0xa0 kernel/sched/core.c:7513

CPU: 0 UID: 0 PID: 8007 Comm: syz.0.375 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
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