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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
 memset_orig+0x75/0xb0 arch/x86/lib/memset_64.S:91
 kmsan_internal_unpoison_memory mm/kmsan/core.c:63 [inline]
 kmsan_internal_chain_origin+0x9a/0xd0 mm/kmsan/core.c:186
 __msan_chain_origin+0xc1/0x140 mm/kmsan/instrumentation.c:252
 tlb_update_vma_flags include/asm-generic/tlb.h:489 [inline]
 tlb_start_vma include/asm-generic/tlb.h:572 [inline]
 __zap_vma_range+0x9605/0x9690 mm/memory.c:2103
 unmap_vmas+0x440/0x800 mm/memory.c:2178
 unmap_region+0x267/0x410 mm/vma.c:488
 vms_clear_ptes mm/vma.c:1303 [inline]
 vms_complete_munmap_vmas+0x58d/0xfa0 mm/vma.c:1345
 do_vmi_align_munmap+0x75c/0x7f0 mm/vma.c:1604
 do_vmi_munmap+0x441/0x4b0 mm/vma.c:1652
 __vm_munmap+0x35e/0x5e0 mm/vma.c:3285
 vm_munmap+0x38/0x50 mm/mmap.c:1072
 elf_map fs/binfmt_elf.c:398 [inline]
 elf_load+0x4f3/0xea0 fs/binfmt_elf.c:423
 load_elf_binary+0x2620/0x5650 fs/binfmt_elf.c:1188
 search_binary_handler fs/exec.c:1664 [inline]
 exec_binprm fs/exec.c:1696 [inline]
 bprm_execve+0xb14/0x1930 fs/exec.c:1748
 kernel_execve+0xf61/0x1120 fs/exec.c:1892
 call_usermodehelper_exec_async+0x4a0/0x6f0 kernel/umh.c:109
 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 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: 7120 Comm: modprobe Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
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