=====================================================
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:271
 instr_sysvec_call_function_single arch/x86/kernel/smp.c:266 [inline]
 sysvec_call_function_single+0x7c/0x90 arch/x86/kernel/smp.c:266
 asm_sysvec_call_function_single+0x1f/0x30 arch/x86/include/asm/idtentry.h:704
 smap_restore arch/x86/include/asm/smap.h:90 [inline]
 get_shadow_origin_ptr mm/kmsan/instrumentation.c:39 [inline]
 __msan_metadata_ptr_for_store_4+0x2e/0x40 mm/kmsan/instrumentation.c:93
 alloc_from_pcs mm/slub.c:4737 [inline]
 slab_alloc_node mm/slub.c:4851 [inline]
 kmem_cache_alloc_node_noprof+0x674/0x12c0 mm/slub.c:4918
 __alloc_skb+0x744/0x1190 net/core/skbuff.c:702
 alloc_skb include/linux/skbuff.h:1383 [inline]
 nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:819 [inline]
 nsim_dev_trap_report drivers/net/netdevsim/dev.c:876 [inline]
 nsim_dev_trap_report_work+0x3f2/0x1430 drivers/net/netdevsim/dev.c:922
 process_one_work kernel/workqueue.c:3288 [inline]
 process_scheduled_works+0xb65/0x1e40 kernel/workqueue.c:3371
 worker_thread+0xee4/0x1590 kernel/workqueue.c:3452
 kthread+0x53f/0x600 kernel/kthread.c:436
 ret_from_fork+0x20f/0x8d0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Local variable reuse.i created at:
 mas_wr_node_store lib/maple_tree.c:3495 [inline]
 mas_wr_store_entry+0x14c9/0x9510 lib/maple_tree.c:3764
 mas_store_prealloc+0x1834/0x1e20 lib/maple_tree.c:5169

CPU: 1 UID: 0 PID: 6824 Comm: kworker/u8:14 Tainted: G        W           syzkaller #0 PREEMPT(full) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Workqueue: events_unbound nsim_dev_trap_report_work
=====================================================