================================================================== BUG: KMSAN: uninit-value in __list_del_entry_valid+0x183/0x440 lib/list_debug.c:42 CPU: 1 PID: 23434 Comm: blkid Not tainted 4.17.0+ #9 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x185/0x1d0 lib/dump_stack.c:113 kmsan_report+0x188/0x2a0 mm/kmsan/kmsan.c:1125 __msan_warning_32+0x70/0xc0 mm/kmsan/kmsan_instr.c:620 __list_del_entry_valid+0x183/0x440 lib/list_debug.c:42 __list_del_entry include/linux/list.h:117 [inline] list_del include/linux/list.h:125 [inline] __rmqueue_pcplist mm/page_alloc.c:2951 [inline] rmqueue_pcplist mm/page_alloc.c:2971 [inline] rmqueue mm/page_alloc.c:2993 [inline] get_page_from_freelist+0x9d8b/0xb740 mm/page_alloc.c:3352 __alloc_pages_nodemask+0x792/0x5cc0 mm/page_alloc.c:4371 alloc_pages_current+0x6b1/0x970 mm/mempolicy.c:2093 alloc_pages include/linux/gfp.h:494 [inline] pte_alloc_one+0x56/0x100 arch/x86/mm/pgtable.c:30 do_fault_around mm/memory.c:3588 [inline] do_read_fault mm/memory.c:3629 [inline] do_fault mm/memory.c:3734 [inline] handle_pte_fault mm/memory.c:3965 [inline] __handle_mm_fault mm/memory.c:4089 [inline] handle_mm_fault+0x2e7b/0x7ed0 mm/memory.c:4126 __do_page_fault+0xec6/0x1a10 arch/x86/mm/fault.c:1400 do_page_fault+0xb7/0x250 arch/x86/mm/fault.c:1477 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1163 RIP: 0033:0x7f23bfd13f84 RSP: 002b:00007ffe3130fe90 EFLAGS: 00010202 RAX: 00007f23bfae4848 RBX: 00007f23bff294c8 RCX: 00007f23bfd211d7 RDX: 00007f23bfd09e20 RSI: 0000000000000030 RDI: 00007f23bff294c8 RBP: 00007ffe31310000 R08: 0000000070000029 R09: 000000006ffffdff R10: 000000006ffffeff R11: 0000000000000246 R12: 00007ffe313100e8 R13: 000000006fffff48 R14: 00007ffe3130fde0 R15: 00007ffe3130fd80 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:282 [inline] kmsan_save_stack mm/kmsan/kmsan.c:297 [inline] kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:689 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:464 __write_once_size include/linux/compiler.h:224 [inline] __list_add include/linux/list.h:66 [inline] list_add include/linux/list.h:79 [inline] free_unref_page_commit+0x4bc/0x4d0 mm/page_alloc.c:2774 free_unref_page mm/page_alloc.c:2794 [inline] __free_pages mm/page_alloc.c:4440 [inline] free_pages+0x290/0x320 mm/page_alloc.c:4452 arch_tlb_finish_mmu mm/memory.c:291 [inline] tlb_finish_mmu+0x3f7/0x5c0 mm/memory.c:434 exit_mmap+0x539/0x980 mm/mmap.c:3107 __mmput+0x158/0x600 kernel/fork.c:962 mmput+0xab/0xf0 kernel/fork.c:983 exit_mm+0x6ed/0x7a0 kernel/exit.c:545 do_exit+0xc12/0x3930 kernel/exit.c:854 do_group_exit+0x1a0/0x360 kernel/exit.c:970 get_signal+0x1405/0x1ec0 kernel/signal.c:2482 do_signal+0xb8/0x1d20 arch/x86/kernel/signal.c:810 exit_to_usermode_loop arch/x86/entry/common.c:162 [inline] prepare_exit_to_usermode+0x271/0x3a0 arch/x86/entry/common.c:196 syscall_return_slowpath+0xe9/0x710 arch/x86/entry/common.c:265 do_syscall_64+0x1ad/0x230 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:282 [inline] kmsan_save_stack mm/kmsan/kmsan.c:297 [inline] kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:689 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:464 tlb_next_batch mm/memory.c:214 [inline] __tlb_remove_page_size mm/memory.c:317 [inline] __tlb_remove_page include/asm-generic/tlb.h:150 [inline] zap_pte_range mm/memory.c:1341 [inline] zap_pmd_range mm/memory.c:1442 [inline] zap_pud_range mm/memory.c:1471 [inline] zap_p4d_range mm/memory.c:1492 [inline] unmap_page_range+0xeb4/0x3be0 mm/memory.c:1513 unmap_single_vma+0x445/0x5e0 mm/memory.c:1558 unmap_vmas+0x1f4/0x360 mm/memory.c:1588 exit_mmap+0x4d7/0x980 mm/mmap.c:3105 __mmput+0x158/0x600 kernel/fork.c:962 mmput+0xab/0xf0 kernel/fork.c:983 exit_mm+0x6ed/0x7a0 kernel/exit.c:545 do_exit+0xc12/0x3930 kernel/exit.c:854 do_group_exit+0x1a0/0x360 kernel/exit.c:970 get_signal+0x1405/0x1ec0 kernel/signal.c:2482 do_signal+0xb8/0x1d20 arch/x86/kernel/signal.c:810 exit_to_usermode_loop arch/x86/entry/common.c:162 [inline] prepare_exit_to_usermode+0x271/0x3a0 arch/x86/entry/common.c:196 syscall_return_slowpath+0xe9/0x710 arch/x86/entry/common.c:265 do_syscall_64+0x1ad/0x230 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:282 [inline] kmsan_save_stack mm/kmsan/kmsan.c:297 [inline] kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:689 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:464 __write_once_size include/linux/compiler.h:224 [inline] __list_add include/linux/list.h:66 [inline] list_add include/linux/list.h:79 [inline] free_unref_page_commit+0x4bc/0x4d0 mm/page_alloc.c:2774 free_unref_page mm/page_alloc.c:2794 [inline] __free_pages mm/page_alloc.c:4440 [inline] free_pages+0x290/0x320 mm/page_alloc.c:4452 arch_tlb_finish_mmu mm/memory.c:291 [inline] tlb_finish_mmu+0x3f7/0x5c0 mm/memory.c:434 exit_mmap+0x539/0x980 mm/mmap.c:3107 __mmput+0x158/0x600 kernel/fork.c:962 mmput+0xab/0xf0 kernel/fork.c:983 exit_mm+0x6ed/0x7a0 kernel/exit.c:545 do_exit+0xc12/0x3930 kernel/exit.c:854 do_group_exit+0x1a0/0x360 kernel/exit.c:970 get_signal+0x1405/0x1ec0 kernel/signal.c:2482 do_signal+0xb8/0x1d20 arch/x86/kernel/signal.c:810 exit_to_usermode_loop arch/x86/entry/common.c:162 [inline] prepare_exit_to_usermode+0x271/0x3a0 arch/x86/entry/common.c:196 syscall_return_slowpath+0xe9/0x710 arch/x86/entry/common.c:265 do_syscall_64+0x1ad/0x230 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Local variable description: ----tlb@exit_mmap Variable was created at: exit_mmap+0x47/0x980 mm/mmap.c:3051 __mmput+0x158/0x600 kernel/fork.c:962 ==================================================================