=====================================================
BUG: KMSAN: uninit-value in __flush_smp_call_function_queue+0x343/0x1710 kernel/smp.c:535
 __flush_smp_call_function_queue+0x343/0x1710 kernel/smp.c:535
 generic_smp_call_function_single_interrupt+0x1c/0x30 kernel/smp.c:463
 __sysvec_call_function_single+0x45/0x310 arch/x86/kernel/smp.c:271
 instr_sysvec_call_function_single arch/x86/kernel/smp.c:266 [inline]
 sysvec_call_function_single+0x3d/0x90 arch/x86/kernel/smp.c:266
 asm_sysvec_call_function_single+0x1f/0x30 arch/x86/include/asm/idtentry.h:704

Uninit was stored to memory at:
 mas_topiary_replace lib/maple_tree.c:2411 [inline]
 mas_wmb_replace+0x369d/0x4260 lib/maple_tree.c:2433
 mas_split lib/maple_tree.c:3052 [inline]
 mas_commit_b_node lib/maple_tree.c:3072 [inline]
 mas_wr_bnode lib/maple_tree.c:3739 [inline]
 mas_wr_store_entry+0x2f0d/0x93d0 lib/maple_tree.c:3771
 mas_store_prealloc+0x1830/0x1df0 lib/maple_tree.c:5169
 vma_iter_store_overwrite mm/vma.h:544 [inline]
 vma_iter_store_new mm/vma.h:551 [inline]
 vma_complete+0xbea/0x1950 mm/vma.c:353
 __split_vma+0x120c/0x1330 mm/vma.c:566
 vms_gather_munmap_vmas+0x5e3/0x1ab0 mm/vma.c:1423
 __mmap_setup mm/vma.c:2405 [inline]
 __mmap_region mm/vma.c:2734 [inline]
 mmap_region+0xc88/0x5b80 mm/vma.c:2830
 do_mmap+0x17aa/0x1d70 mm/mmap.c:558
 vm_mmap_pgoff+0x40c/0x760 mm/util.c:581
 ksys_mmap_pgoff+0x51c/0x7d0 mm/mmap.c:604
 __do_sys_mmap_pgoff mm/mmap.c:615 [inline]
 __se_sys_mmap_pgoff mm/mmap.c:611 [inline]
 __ia32_sys_mmap_pgoff+0x11a/0x1d0 mm/mmap.c:611
 ia32_sys_call+0x3743/0x4360 arch/x86/include/generated/asm/syscalls_32.h:193
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0x17f/0x3f0 arch/x86/entry/syscall_32.c:307
 do_fast_syscall_32+0x37/0x80 arch/x86/entry/syscall_32.c:332
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:370
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

Local variable tmp_next.i created at:
 mas_topiary_replace lib/maple_tree.c:2335 [inline]
 mas_wmb_replace+0x66/0x4260 lib/maple_tree.c:2433
 mas_split lib/maple_tree.c:3052 [inline]
 mas_commit_b_node lib/maple_tree.c:3072 [inline]
 mas_wr_bnode lib/maple_tree.c:3739 [inline]
 mas_wr_store_entry+0x2f0d/0x93d0 lib/maple_tree.c:3771

CPU: 0 UID: 0 PID: 20444 Comm: syz.9.2960 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
=====================================================