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AFNElJ/k2AQPdUhNDwfg63MKxGRyW886c/R7JzbSvgUcvI/P7LeBmwQcT/ipLGOv4j8kmwRe16e8DwDhAw==@kvack.org X-Gm-Message-State: AOJu0YzGJI2fu+/taaphKLOTOFnlas4HRecC4GEkG+Z1gxFJK8GwyB1i tTmQsXgxFcUcgX3wEUYhGEIQD0nrDrJ1ffp3JihlWD8MLg9tIPqNJb320I7POcd5GgRVz2ktztR Szo4LRRmZMkZe/cko7D5tXc08bdZaKxcK/vDF4D0rk71hxFbenC7uhiOdvB8= MIME-Version: 1.0 X-Received: by 2002:a05:6820:180a:b0:67e:2905:83d2 with SMTP id 006d021491bc7-69462e3a8ffmr17937119eaf.21.1777016244359; Fri, 24 Apr 2026 00:37:24 -0700 (PDT) Date: Fri, 24 Apr 2026 00:37:24 -0700 In-Reply-To: <20260423164307.29805-1-jp.kobryn@linux.dev> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69eb1db4.a00a0220.9259.0035.GAE@google.com> Subject: [syzbot ci] Re: mm/lruvec: preemptively free dead folios during lru_add drain From: syzbot ci To: akpm@linux-foundation.org, axelrasmussen@google.com, baohua@kernel.org, bhe@redhat.com, chrisl@kernel.org, hannes@cmpxchg.org, jp.kobryn@linux.dev, kasong@tencent.com, kernel-team@meta.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mhocko@suse.com, nphamcs@gmail.com, qi.zheng@linux.dev, riel@surriel.com, shakeel.butt@linux.dev, shikemeng@huaweicloud.com, vbabka@kernel.org, weixugc@google.com, willy@infradead.org, youngjun.park@lge.com, yuanchu@google.com Cc: syzbot@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Stat-Signature: jt8oseoxguafie1p6kib4guy8kediff8 X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 4F4574000A X-HE-Tag: 1777016245-359493 X-HE-Meta: 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 f/8wA+gC 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 +JmLvqR0 b11beWp8JF94TGsRTiZTV0EihYa73yVuESReAObLZw/cFv0PCiU01g== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: syzbot ci has tested the following series [v1] mm/lruvec: preemptively free dead folios during lru_add drain https://lore.kernel.org/all/20260423164307.29805-1-jp.kobryn@linux.dev * [PATCH] mm/lruvec: preemptively free dead folios during lru_add drain and found the following issues: * BUG: Bad page state in do_pte_missing * BUG: Bad page state in do_wp_page Full report is available here: https://ci.syzbot.org/series/d16e663b-bcf5-49dd-937d-24a22e0c8d6a *** BUG: Bad page state in do_pte_missing tree: mm-new URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/akpm/mm.git base: c9183ec6e2e3bd26a017392d6c3eaa40c580f153 arch: amd64 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 config: https://ci.syzbot.org/builds/4d1a53f4-f506-4ba9-a8c2-a48196f95abc/config syz repro: https://ci.syzbot.org/findings/19ba977e-39f2-4f40-b936-a8642aaab537/syz_repro BUG: Bad page state: 15292 messages suppressed BUG: Bad page state in process syz.2.1435 pfn:1af40e page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x7f14c9e16 pfn:0x1af40e flags: 0x57ff00000020908(uptodate|active|owner_2|swapbacked|node=1|zone=2|lastcpupid=0x7ff) raw: 057ff00000020908 0000000000000000 dead000000000122 0000000000000000 raw: 00000007f14c9e16 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x140dca(GFP_HIGHUSER_MOVABLE|__GFP_ZERO|__GFP_COMP), pid 8846, tgid 8846 (syz.0.1431), ts 86965635591, free_ts 69887114766 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1858 prep_new_page mm/page_alloc.c:1866 [inline] get_page_from_freelist+0x24ba/0x2540 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5226 alloc_pages_mpol+0x235/0x490 mm/mempolicy.c:2490 folio_alloc_mpol_noprof+0x39/0x160 mm/mempolicy.c:2509 vma_alloc_folio_noprof+0xe1/0x1e0 mm/mempolicy.c:2544 folio_prealloc mm/memory.c:-1 [inline] alloc_anon_folio mm/memory.c:5282 [inline] do_anonymous_page mm/memory.c:5376 [inline] do_pte_missing+0x159d/0x33f0 mm/memory.c:4548 handle_pte_fault mm/memory.c:6411 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x1bd7/0x3170 mm/memory.c:6718 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 page last free pid 5831 tgid 5831 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1402 [inline] free_unref_folios+0xcec/0x1480 mm/page_alloc.c:3004 folios_put_refs+0xa3d/0xb80 mm/swap.c:1042 free_pages_and_swap_cache+0x41d/0x490 mm/swap_state.c:404 __tlb_batch_free_encoded_pages mm/mmu_gather.c:138 [inline] tlb_batch_pages_flush mm/mmu_gather.c:151 [inline] tlb_flush_mmu_free mm/mmu_gather.c:417 [inline] tlb_flush_mmu+0x6d3/0xa30 mm/mmu_gather.c:424 tlb_finish_mmu+0xf9/0x230 mm/mmu_gather.c:549 unmap_region+0x2a5/0x330 mm/vma.c:491 vms_clear_ptes mm/vma.c:1303 [inline] vms_complete_munmap_vmas+0x493/0xc60 mm/vma.c:1345 do_vmi_align_munmap+0x3b7/0x4b0 mm/vma.c:1604 do_vmi_munmap+0x252/0x2d0 mm/vma.c:1652 __vm_munmap+0x22c/0x3d0 mm/vma.c:3285 __do_sys_munmap mm/mmap.c:1079 [inline] __se_sys_munmap mm/mmap.c:1076 [inline] __x64_sys_munmap+0x60/0x70 mm/mmap.c:1076 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Modules linked in: CPU: 1 UID: 0 PID: 8855 Comm: syz.2.1435 Tainted: G B syzkaller #0 PREEMPT(full) Tainted: [B]=BAD_PAGE Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 bad_page+0x17f/0x1c0 mm/page_alloc.c:632 free_page_is_bad mm/page_alloc.c:1073 [inline] __free_pages_prepare mm/page_alloc.c:1393 [inline] free_unref_folios+0xdcc/0x1480 mm/page_alloc.c:3004 folio_batch_move_lru+0x816/0x9e0 mm/swap.c:206 __folio_batch_add_and_move+0x510/0xc50 mm/swap.c:226 folio_add_lru_vma+0x196/0x210 mm/swap.c:566 map_anon_folio_pte_nopf+0x2ee/0x5e0 mm/memory.c:5301 map_anon_folio_pte_pf+0xbe/0x260 mm/memory.c:5311 do_anonymous_page mm/memory.c:5413 [inline] do_pte_missing+0x2d48/0x33f0 mm/memory.c:4548 handle_pte_fault mm/memory.c:6411 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x1bd7/0x3170 mm/memory.c:6718 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x7fca082696d2 Code: 48 89 ca 48 c1 e2 04 48 29 ca 48 8d 0d 5f c9 3a 00 48 c1 e2 04 48 01 c2 8b 44 24 1c c6 42 20 01 89 42 24 8b 44 24 24 89 6a 28 <89> 42 78 0f b6 44 24 43 89 72 2c 88 44 19 04 8b 44 24 20 31 c9 89 RSP: 002b:00007ffc5adb04c0 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fca08616018 RDX: 00007fca08615fa0 RSI: 0000000000000003 RDI: 0000000000000000 RBP: 0000000000001cd6 R08: 00007fca08615fa0 R09: 00007ffc5adb0357 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fca08615fac R14: 00007fca08615fa8 R15: 00007fca08615fa0 BUG: Bad page state in process syz.2.1435 pfn:1af40f page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x7f14c9e17 pfn:0x1af40f flags: 0x57ff00000020908(uptodate|active|owner_2|swapbacked|node=1|zone=2|lastcpupid=0x7ff) raw: 057ff00000020908 0000000000000000 dead000000000122 0000000000000000 raw: 00000007f14c9e17 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 8846, tgid 8846 (syz.0.1431), ts 86965651367, free_ts 69887118923 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1858 prep_new_page mm/page_alloc.c:1866 [inline] get_page_from_freelist+0x24ba/0x2540 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5226 alloc_pages_mpol+0x235/0x490 mm/mempolicy.c:2490 folio_alloc_mpol_noprof+0x39/0x160 mm/mempolicy.c:2509 vma_alloc_folio_noprof+0xe1/0x1e0 mm/mempolicy.c:2544 folio_prealloc mm/memory.c:-1 [inline] wp_page_copy mm/memory.c:3859 [inline] do_wp_page+0x118a/0x4cc0 mm/memory.c:4320 handle_pte_fault mm/memory.c:6427 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x151d/0x3170 mm/memory.c:6718 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 page last free pid 5831 tgid 5831 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1402 [inline] free_unref_folios+0xcec/0x1480 mm/page_alloc.c:3004 folios_put_refs+0xa3d/0xb80 mm/swap.c:1042 free_pages_and_swap_cache+0x41d/0x490 mm/swap_state.c:404 __tlb_batch_free_encoded_pages mm/mmu_gather.c:138 [inline] tlb_batch_pages_flush mm/mmu_gather.c:151 [inline] tlb_flush_mmu_free mm/mmu_gather.c:417 [inline] tlb_flush_mmu+0x6d3/0xa30 mm/mmu_gather.c:424 tlb_finish_mmu+0xf9/0x230 mm/mmu_gather.c:549 unmap_region+0x2a5/0x330 mm/vma.c:491 vms_clear_ptes mm/vma.c:1303 [inline] vms_complete_munmap_vmas+0x493/0xc60 mm/vma.c:1345 do_vmi_align_munmap+0x3b7/0x4b0 mm/vma.c:1604 do_vmi_munmap+0x252/0x2d0 mm/vma.c:1652 __vm_munmap+0x22c/0x3d0 mm/vma.c:3285 __do_sys_munmap mm/mmap.c:1079 [inline] __se_sys_munmap mm/mmap.c:1076 [inline] __x64_sys_munmap+0x60/0x70 mm/mmap.c:1076 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Modules linked in: CPU: 1 UID: 0 PID: 8855 Comm: syz.2.1435 Tainted: G B syzkaller #0 PREEMPT(full) Tainted: [B]=BAD_PAGE Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 bad_page+0x17f/0x1c0 mm/page_alloc.c:632 free_page_is_bad mm/page_alloc.c:1073 [inline] __free_pages_prepare mm/page_alloc.c:1393 [inline] free_unref_folios+0xdcc/0x1480 mm/page_alloc.c:3004 folio_batch_move_lru+0x816/0x9e0 mm/swap.c:206 __folio_batch_add_and_move+0x510/0xc50 mm/swap.c:226 folio_add_lru_vma+0x196/0x210 mm/swap.c:566 map_anon_folio_pte_nopf+0x2ee/0x5e0 mm/memory.c:5301 map_anon_folio_pte_pf+0xbe/0x260 mm/memory.c:5311 do_anonymous_page mm/memory.c:5413 [inline] do_pte_missing+0x2d48/0x33f0 mm/memory.c:4548 handle_pte_fault mm/memory.c:6411 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x1bd7/0x3170 mm/memory.c:6718 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x7fca082696d2 Code: 48 89 ca 48 c1 e2 04 48 29 ca 48 8d 0d 5f c9 3a 00 48 c1 e2 04 48 01 c2 8b 44 24 1c c6 42 20 01 89 42 24 8b 44 24 24 89 6a 28 <89> 42 78 0f b6 44 24 43 89 72 2c 88 44 19 04 8b 44 24 20 31 c9 89 RSP: 002b:00007ffc5adb04c0 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fca08616018 RDX: 00007fca08615fa0 RSI: 0000000000000003 RDI: 0000000000000000 RBP: 0000000000001cd6 R08: 00007fca08615fa0 R09: 00007ffc5adb0357 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fca08615fac R14: 00007fca08615fa8 R15: 00007fca08615fa0 BUG: Bad page state in process syz.2.1435 pfn:1af410 page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x7f14c91fd pfn:0x1af410 flags: 0x57ff00000020908(uptodate|active|owner_2|swapbacked|node=1|zone=2|lastcpupid=0x7ff) raw: 057ff00000020908 0000000000000000 dead000000000122 0000000000000000 raw: 00000007f14c91fd 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x140dca(GFP_HIGHUSER_MOVABLE|__GFP_ZERO|__GFP_COMP), pid 8849, tgid 8846 (syz.0.1431), ts 86965683544, free_ts 69887122392 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1858 prep_new_page mm/page_alloc.c:1866 [inline] get_page_from_freelist+0x24ba/0x2540 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5226 alloc_pages_mpol+0x235/0x490 mm/mempolicy.c:2490 folio_alloc_mpol_noprof+0x39/0x160 mm/mempolicy.c:2509 vma_alloc_folio_noprof+0xe1/0x1e0 mm/mempolicy.c:2544 folio_prealloc mm/memory.c:-1 [inline] alloc_anon_folio mm/memory.c:5282 [inline] do_anonymous_page mm/memory.c:5376 [inline] do_pte_missing+0x159d/0x33f0 mm/memory.c:4548 handle_pte_fault mm/memory.c:6411 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x1bd7/0x3170 mm/memory.c:6718 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 page last free pid 5831 tgid 5831 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1402 [inline] free_unref_folios+0xcec/0x1480 mm/page_alloc.c:3004 folios_put_refs+0xa3d/0xb80 mm/swap.c:1042 free_pages_and_swap_cache+0x41d/0x490 mm/swap_state.c:404 __tlb_batch_free_encoded_pages mm/mmu_gather.c:138 [inline] tlb_batch_pages_flush mm/mmu_gather.c:151 [inline] tlb_flush_mmu_free mm/mmu_gather.c:417 [inline] tlb_flush_mmu+0x6d3/0xa30 mm/mmu_gather.c:424 tlb_finish_mmu+0xf9/0x230 mm/mmu_gather.c:549 unmap_region+0x2a5/0x330 mm/vma.c:491 vms_clear_ptes mm/vma.c:1303 [inline] vms_complete_munmap_vmas+0x493/0xc60 mm/vma.c:1345 do_vmi_align_munmap+0x3b7/0x4b0 mm/vma.c:1604 do_vmi_munmap+0x252/0x2d0 mm/vma.c:1652 __vm_munmap+0x22c/0x3d0 mm/vma.c:3285 __do_sys_munmap mm/mmap.c:1079 [inline] __se_sys_munmap mm/mmap.c:1076 [inline] __x64_sys_munmap+0x60/0x70 mm/mmap.c:1076 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Modules linked in: CPU: 1 UID: 0 PID: 8855 Comm: syz.2.1435 Tainted: G B syzkaller #0 PREEMPT(full) Tainted: [B]=BAD_PAGE Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 bad_page+0x17f/0x1c0 mm/page_alloc.c:632 free_page_is_bad mm/page_alloc.c:1073 [inline] __free_pages_prepare mm/page_alloc.c:1393 [inline] free_unref_folios+0xdcc/0x1480 mm/page_alloc.c:3004 folio_batch_move_lru+0x816/0x9e0 mm/swap.c:206 __folio_batch_add_and_move+0x510/0xc50 mm/swap.c:226 folio_add_lru_vma+0x196/0x210 mm/swap.c:566 map_anon_folio_pte_nopf+0x2ee/0x5e0 mm/memory.c:5301 map_anon_folio_pte_pf+0xbe/0x260 mm/memory.c:5311 do_anonymous_page mm/memory.c:5413 [inline] do_pte_missing+0x2d48/0x33f0 mm/memory.c:4548 handle_pte_fault mm/memory.c:6411 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x1bd7/0x3170 mm/memory.c:6718 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x7fca082696d2 Code: 48 89 ca 48 c1 e2 04 48 29 ca 48 8d 0d 5f c9 3a 00 48 c1 e2 04 48 01 c2 8b 44 24 1c c6 42 20 01 89 42 24 8b 44 24 24 89 6a 28 <89> 42 78 0f b6 44 24 43 89 72 2c 88 44 19 04 8b 44 24 20 31 c9 89 RSP: 002b:00007ffc5adb04c0 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fca08616018 RDX: 00007fca08615fa0 RSI: 0000000000000003 RDI: 0000000000000000 RBP: 0000000000001cd6 R08: 00007fca08615fa0 R09: 00007ffc5adb0357 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fca08615fac R14: 00007fca08615fa8 R15: 00007fca08615fa0 BUG: Bad page state in process syz.2.1435 pfn:1af411 page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x7f14c9e12 pfn:0x1af411 flags: 0x57ff00000020908(uptodate|active|owner_2|swapbacked|node=1|zone=2|lastcpupid=0x7ff) raw: 057ff00000020908 0000000000000000 dead000000000122 0000000000000000 raw: 00000007f14c9e12 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 8846, tgid 8846 (syz.0.1431), ts 86965789200, free_ts 69887126279 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1858 prep_new_page mm/page_alloc.c:1866 [inline] get_page_from_freelist+0x24ba/0x2540 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5226 alloc_pages_mpol+0x235/0x490 mm/mempolicy.c:2490 folio_alloc_mpol_noprof+0x39/0x160 mm/mempolicy.c:2509 vma_alloc_folio_noprof+0xe1/0x1e0 mm/mempolicy.c:2544 folio_prealloc mm/memory.c:-1 [inline] wp_page_copy mm/memory.c:3859 [inline] do_wp_page+0x118a/0x4cc0 mm/memory.c:4320 handle_pte_fault mm/memory.c:6427 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x151d/0x3170 mm/memory.c:6718 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 page last free pid 5831 tgid 5831 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1402 [inline] free_unref_folios+0xcec/0x1480 mm/page_alloc.c:3004 folios_put_refs+0xa3d/0xb80 mm/swap.c:1042 free_pages_and_swap_cache+0x41d/0x490 mm/swap_state.c:404 __tlb_batch_free_encoded_pages mm/mmu_gather.c:138 [inline] tlb_batch_pages_flush mm/mmu_gather.c:151 [inline] tlb_flush_mmu_free mm/mmu_gather.c:417 [inline] tlb_flush_mmu+0x6d3/0xa30 mm/mmu_gather.c:424 tlb_finish_mmu+0xf9/0x230 mm/mmu_gather.c:549 unmap_region+0x2a5/0x330 mm/vma.c:491 vms_clear_ptes mm/vma.c:1303 [inline] vms_complete_munmap_vmas+0x493/0xc60 mm/vma.c:1345 do_vmi_align_munmap+0x3b7/0x4b0 mm/vma.c:1604 do_vmi_munmap+0x252/0x2d0 mm/vma.c:1652 __vm_munmap+0x22c/0x3d0 mm/vma.c:3285 __do_sys_munmap mm/mmap.c:1079 [inline] __se_sys_munmap mm/mmap.c:1076 [inline] __x64_sys_munmap+0x60/0x70 mm/mmap.c:1076 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Modules linked in: CPU: 1 UID: 0 PID: 8855 Comm: syz.2.1435 Tainted: G B syzkaller #0 PREEMPT(full) Tainted: [B]=BAD_PAGE Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 bad_page+0x17f/0x1c0 mm/page_alloc.c:632 free_page_is_bad mm/page_alloc.c:1073 [inline] __free_pages_prepare mm/page_alloc.c:1393 [inline] free_unref_folios+0xdcc/0x1480 mm/page_alloc.c:3004 folio_batch_move_lru+0x816/0x9e0 mm/swap.c:206 __folio_batch_add_and_move+0x510/0xc50 mm/swap.c:226 folio_add_lru_vma+0x196/0x210 mm/swap.c:566 map_anon_folio_pte_nopf+0x2ee/0x5e0 mm/memory.c:5301 map_anon_folio_pte_pf+0xbe/0x260 mm/memory.c:5311 do_anonymous_page mm/memory.c:5413 [inline] do_pte_missing+0x2d48/0x33f0 mm/memory.c:4548 handle_pte_fault mm/memory.c:6411 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x1bd7/0x3170 mm/memory.c:6718 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x7fca082696d2 Code: 48 89 ca 48 c1 e2 04 48 29 ca 48 8d 0d 5f c9 3a 00 48 c1 e2 04 48 01 c2 8b 44 24 1c c6 42 20 01 89 42 24 8b 44 24 24 89 6a 28 <89> 42 78 0f b6 44 24 43 89 72 2c 88 44 19 04 8b 44 24 20 31 c9 89 RSP: 002b:00007ffc5adb04c0 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fca08616018 RDX: 00007fca08615fa0 RSI: 0000000000000003 RDI: 0000000000000000 RBP: 0000000000001cd6 R08: 00007fca08615fa0 R09: 00007ffc5adb0357 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fca08615fac R14: 00007fca08615fa8 R15: 00007fca08615fa0 BUG: Bad page state in process syz.2.1435 pfn:1af40b page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x555573b0d pfn:0x1af40b flags: 0x57ff0000002090c(referenced|uptodate|active|owner_2|swapbacked|node=1|zone=2|lastcpupid=0x7ff) raw: 057ff0000002090c 0000000000000000 dead000000000122 0000000000000000 raw: 0000000555573b0d 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 8851, tgid 8851 (syz-executor), ts 86975719417, free_ts 86967133373 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1858 prep_new_page mm/page_alloc.c:1866 [inline] get_page_from_freelist+0x24ba/0x2540 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5226 alloc_pages_mpol+0x235/0x490 mm/mempolicy.c:2490 folio_alloc_mpol_noprof+0x39/0x160 mm/mempolicy.c:2509 vma_alloc_folio_noprof+0xe1/0x1e0 mm/mempolicy.c:2544 folio_prealloc mm/memory.c:-1 [inline] wp_page_copy mm/memory.c:3859 [inline] do_wp_page+0x118a/0x4cc0 mm/memory.c:4320 handle_pte_fault mm/memory.c:6427 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x151d/0x3170 mm/memory.c:6718 do_user_addr_fault+0x75b/0x1340 arch/x86/mm/fault.c:1385 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 page last free pid 8849 tgid 8846 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1402 [inline] free_unref_folios+0xcec/0x1480 mm/page_alloc.c:3004 folios_put_refs+0xa3d/0xb80 mm/swap.c:1042 free_pages_and_swap_cache+0x41d/0x490 mm/swap_state.c:404 __tlb_batch_free_encoded_pages mm/mmu_gather.c:138 [inline] tlb_batch_pages_flush mm/mmu_gather.c:151 [inline] tlb_flush_mmu_free mm/mmu_gather.c:417 [inline] tlb_flush_mmu+0x6d3/0xa30 mm/mmu_gather.c:424 tlb_finish_mmu+0xf9/0x230 mm/mmu_gather.c:549 exit_mmap+0x498/0x9e0 mm/mmap.c:1313 __mmput+0x118/0x430 kernel/fork.c:1178 exit_mm+0x18e/0x250 kernel/exit.c:581 do_exit+0x6a2/0x22c0 kernel/exit.c:963 do_group_exit+0x21b/0x2d0 kernel/exit.c:1117 get_signal+0x1284/0x1330 kernel/signal.c:3037 arch_do_signal_or_restart+0xbc/0x830 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline] exit_to_user_mode_loop+0x86/0x480 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:328 [inline] do_syscall_64+0x33e/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f Modules linked in: CPU: 1 UID: 0 PID: 8855 Comm: syz.2.1435 Tainted: G B syzkaller #0 PREEMPT(full) Tainted: [B]=BAD_PAGE Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 bad_page+0x17f/0x1c0 mm/page_alloc.c:632 free_page_is_bad mm/page_alloc.c:1073 [inline] __free_pages_prepare mm/page_alloc.c:1393 [inline] free_unref_folios+0xdcc/0x1480 mm/page_alloc.c:3004 folio_batch_move_lru+0x816/0x9e0 mm/swap.c:206 __folio_batch_add_and_move+0x510/0xc50 mm/swap.c:226 folio_add_lru_vma+0x196/0x210 mm/swap.c:566 map_anon_folio_pte_nopf+0x2ee/0x5e0 mm/memory.c:5301 map_anon_folio_pte_pf+0xbe/0x260 mm/memory.c:5311 do_anonymous_page mm/memory.c:5413 [inline] do_pte_missing+0x2d48/0x33f0 mm/memory.c:4548 handle_pte_fault mm/memory.c:6411 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x1bd7/0x3170 mm/memory.c:6718 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x7fca082696d2 Code: 48 89 ca 48 c1 e2 04 48 29 ca 48 8d 0d 5f c9 3a 00 48 c1 e2 04 48 01 c2 8b 44 24 1c c6 42 20 01 89 42 24 8b 44 24 24 89 6a 28 <89> 42 78 0f b6 44 24 43 89 72 2c 88 44 19 04 8b 44 24 20 31 c9 89 RSP: 002b:00007ffc5adb04c0 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fca08616018 RDX: 00007fca08615fa0 RSI: 0000000000000003 RDI: 0000000000000000 RBP: 0000000000001cd6 R08: 00007fca08615fa0 R09: 00007ffc5adb0357 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fca08615fac R14: 00007fca08615fa8 R15: 00007fca08615fa0 BUG: Bad page state in process syz.2.1435 pfn:1af409 page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x3ec pfn:0x1af409 flags: 0x57ff00000020908(uptodate|active|owner_2|swapbacked|node=1|zone=2|lastcpupid=0x7ff) raw: 057ff00000020908 0000000000000000 dead000000000122 0000000000000000 raw: 00000000000003ec 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 8851, tgid 8851 (syz-executor), ts 86976014509, free_ts 86967128194 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1858 prep_new_page mm/page_alloc.c:1866 [inline] get_page_from_freelist+0x24ba/0x2540 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5226 alloc_pages_mpol+0x235/0x490 mm/mempolicy.c:2490 folio_alloc_mpol_noprof+0x39/0x160 mm/mempolicy.c:2509 vma_alloc_folio_noprof+0xe1/0x1e0 mm/mempolicy.c:2544 folio_prealloc mm/memory.c:-1 [inline] wp_page_copy mm/memory.c:3859 [inline] do_wp_page+0x118a/0x4cc0 mm/memory.c:4320 handle_pte_fault mm/memory.c:6427 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x151d/0x3170 mm/memory.c:6718 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 page last free pid 8849 tgid 8846 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1402 [inline] free_unref_folios+0xcec/0x1480 mm/page_alloc.c:3004 folios_put_refs+0xa3d/0xb80 mm/swap.c:1042 free_pages_and_swap_cache+0x41d/0x490 mm/swap_state.c:404 __tlb_batch_free_encoded_pages mm/mmu_gather.c:138 [inline] tlb_batch_pages_flush mm/mmu_gather.c:151 [inline] tlb_flush_mmu_free mm/mmu_gather.c:417 [inline] tlb_flush_mmu+0x6d3/0xa30 mm/mmu_gather.c:424 tlb_finish_mmu+0xf9/0x230 mm/mmu_gather.c:549 exit_mmap+0x498/0x9e0 mm/mmap.c:1313 __mmput+0x118/0x430 kernel/fork.c:1178 exit_mm+0x18e/0x250 kernel/exit.c:581 do_exit+0x6a2/0x22c0 kernel/exit.c:963 do_group_exit+0x21b/0x2d0 kernel/exit.c:1117 get_signal+0x1284/0x1330 kernel/signal.c:3037 arch_do_signal_or_restart+0xbc/0x830 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline] exit_to_user_mode_loop+0x86/0x480 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:328 [inline] do_syscall_64+0x33e/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f Modules linked in: CPU: 1 UID: 0 PID: 8855 Comm: syz.2.1435 Tainted: G B syzkaller #0 PREEMPT(full) Tainted: [B]=BAD_PAGE Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 bad_page+0x17f/0x1c0 mm/page_alloc.c:632 free_page_is_bad mm/page_alloc.c:1073 [inline] __free_pages_prepare mm/page_alloc.c:1393 [inline] free_unref_folios+0xdcc/0x1480 mm/page_alloc.c:3004 folio_batch_move_lru+0x816/0x9e0 mm/swap.c:206 __folio_batch_add_and_move+0x510/0xc50 mm/swap.c:226 folio_add_lru_vma+0x196/0x210 mm/swap.c:566 map_anon_folio_pte_nopf+0x2ee/0x5e0 mm/memory.c:5301 map_anon_folio_pte_pf+0xbe/0x260 mm/memory.c:5311 do_anonymous_page mm/memory.c:5413 [inline] do_pte_missing+0x2d48/0x33f0 mm/memory.c:4548 handle_pte_fault mm/memory.c:6411 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x1bd7/0x3170 mm/memory.c:6718 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x7fca082696d2 Code: 48 89 ca 48 c1 e2 04 48 29 ca 48 8d 0d 5f c9 3a 00 48 c1 e2 04 48 01 c2 8b 44 24 1c c6 42 20 01 89 42 24 8b 44 24 24 89 6a 28 <89> 42 78 0f b6 44 24 43 89 72 2c 88 44 19 04 8b 44 24 20 31 c9 89 RSP: 002b:00007ffc5adb04c0 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fca08616018 RDX: 00007fca08615fa0 RSI: 0000000000000003 RDI: 0000000000000000 RBP: 0000000000001cd6 R08: 00007fca08615fa0 R09: 00007ffc5adb0357 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fca08615fac R14: 00007fca08615fa8 R15: 00007fca08615fa0 BUG: Bad page state in process syz.2.1435 pfn:1af571 page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x7f14ca945 pfn:0x1af571 flags: 0x57ff00000020908(uptodate|active|owner_2|swapbacked|node=1|zone=2|lastcpupid=0x7ff) raw: 057ff00000020908 0000000000000000 dead000000000122 0000000000000000 raw: 00000007f14ca945 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 8851, tgid 8851 (syz-executor), ts 86978306736, free_ts 86967122819 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1858 prep_new_page mm/page_alloc.c:1866 [inline] get_page_from_freelist+0x24ba/0x2540 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5226 alloc_pages_mpol+0x235/0x490 mm/mempolicy.c:2490 folio_alloc_mpol_noprof+0x39/0x160 mm/mempolicy.c:2509 vma_alloc_folio_noprof+0xe1/0x1e0 mm/mempolicy.c:2544 folio_prealloc mm/memory.c:-1 [inline] wp_page_copy mm/memory.c:3859 [inline] do_wp_page+0x118a/0x4cc0 mm/memory.c:4320 handle_pte_fault mm/memory.c:6427 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x151d/0x3170 mm/memory.c:6718 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 page last free pid 8849 tgid 8846 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1402 [inline] free_unref_folios+0xcec/0x1480 mm/page_alloc.c:3004 folios_put_refs+0xa3d/0xb80 mm/swap.c:1042 free_pages_and_swap_cache+0x41d/0x490 mm/swap_state.c:404 __tlb_batch_free_encoded_pages mm/mmu_gather.c:138 [inline] tlb_batch_pages_flush mm/mmu_gather.c:151 [inline] tlb_flush_mmu_free mm/mmu_gather.c:417 [inline] tlb_flush_mmu+0x6d3/0xa30 mm/mmu_gather.c:424 tlb_finish_mmu+0xf9/0x230 mm/mmu_gather.c:549 exit_mmap+0x498/0x9e0 mm/mmap.c:1313 __mmput+0x118/0x430 kernel/fork.c:1178 exit_mm+0x18e/0x250 kernel/exit.c:581 do_exit+0x6a2/0x22c0 kernel/exit.c:963 do_group_exit+0x21b/0x2d0 kernel/exit.c:1117 get_signal+0x1284/0x1330 kernel/signal.c:3037 arch_do_signal_or_restart+0xbc/0x830 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline] exit_to_user_mode_loop+0x86/0x480 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:328 [inline] do_syscall_64+0x33e/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f Modules linked in: CPU: 1 UID: 0 PID: 8855 Comm: syz.2.1435 Tainted: G B syzkaller #0 PREEMPT(full) Tainted: [B]=BAD_PAGE Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 bad_page+0x17f/0x1c0 mm/page_alloc.c:632 free_page_is_bad mm/page_alloc.c:1073 [inline] __free_pages_prepare mm/page_alloc.c:1393 [inline] free_unref_folios+0xdcc/0x1480 mm/page_alloc.c:3004 folio_batch_move_lru+0x816/0x9e0 mm/swap.c:206 __folio_batch_add_and_move+0x510/0xc50 mm/swap.c:226 folio_add_lru_vma+0x196/0x210 mm/swap.c:566 map_anon_folio_pte_nopf+0x2ee/0x5e0 mm/memory.c:5301 map_anon_folio_pte_pf+0xbe/0x260 mm/memory.c:5311 do_anonymous_page mm/memory.c:5413 [inline] do_pte_missing+0x2d48/0x33f0 mm/memory.c:4548 handle_pte_fault mm/memory.c:6411 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x1bd7/0x3170 mm/memory.c:6718 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x7fca082696d2 Code: 48 89 ca 48 c1 e2 04 48 29 ca 48 8d 0d 5f c9 3a 00 48 c1 e2 04 48 01 c2 8b 44 24 1c c6 42 20 01 89 42 24 8b 44 24 24 89 6a 28 <89> 42 78 0f b6 44 24 43 89 72 2c 88 44 19 04 8b 44 24 20 31 c9 89 RSP: 002b:00007ffc5adb04c0 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fca08616018 RDX: 00007fca08615fa0 RSI: 0000000000000003 RDI: 0000000000000000 RBP: 0000000000001cd6 R08: 00007fca08615fa0 R09: 00007ffc5adb0357 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fca08615fac R14: 00007fca08615fa8 R15: 00007fca08615fa0 BUG: Bad page state in process syz.2.1435 pfn:1af40c page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x7f14c9e15 pfn:0x1af40c flags: 0x57ff00000020908(uptodate|active|owner_2|swapbacked|node=1|zone=2|lastcpupid=0x7ff) raw: 057ff00000020908 0000000000000000 dead000000000122 0000000000000000 raw: 00000007f14c9e15 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x140dca(GFP_HIGHUSER_MOVABLE|__GFP_ZERO|__GFP_COMP), pid 8851, tgid 8851 (syz.0.1434), ts 86978464147, free_ts 86967036690 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1858 prep_new_page mm/page_alloc.c:1866 [inline] get_page_from_freelist+0x24ba/0x2540 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5226 alloc_pages_mpol+0x235/0x490 mm/mempolicy.c:2490 folio_alloc_mpol_noprof+0x39/0x160 mm/mempolicy.c:2509 vma_alloc_folio_noprof+0xe1/0x1e0 mm/mempolicy.c:2544 folio_prealloc mm/memory.c:-1 [inline] wp_page_copy mm/memory.c:3859 [inline] do_wp_page+0x118a/0x4cc0 mm/memory.c:4320 handle_pte_fault mm/memory.c:6427 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x151d/0x3170 mm/memory.c:6718 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 page last free pid 8849 tgid 8846 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1402 [inline] free_unref_folios+0xcec/0x1480 mm/page_alloc.c:3004 folios_put_refs+0xa3d/0xb80 mm/swap.c:1042 free_pages_and_swap_cache+0x41d/0x490 mm/swap_state.c:404 __tlb_batch_free_encoded_pages mm/mmu_gather.c:138 [inline] tlb_batch_pages_flush mm/mmu_gather.c:151 [inline] tlb_flush_mmu_free mm/mmu_gather.c:417 [inline] tlb_flush_mmu+0x6d3/0xa30 mm/mmu_gather.c:424 tlb_finish_mmu+0xf9/0x230 mm/mmu_gather.c:549 exit_mmap+0x498/0x9e0 mm/mmap.c:1313 __mmput+0x118/0x430 kernel/fork.c:1178 exit_mm+0x18e/0x250 kernel/exit.c:581 do_exit+0x6a2/0x22c0 kernel/exit.c:963 do_group_exit+0x21b/0x2d0 kernel/exit.c:1117 get_signal+0x1284/0x1330 kernel/signal.c:3037 arch_do_signal_or_restart+0xbc/0x830 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline] exit_to_user_mode_loop+0x86/0x480 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:328 [inline] do_syscall_64+0x33e/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f Modules linked in: CPU: 1 UID: 0 PID: 8855 Comm: syz.2.1435 Tainted: G B syzkaller #0 PREEMPT(full) Tainted: [B]=BAD_PAGE Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 bad_page+0x17f/0x1c0 mm/page_alloc.c:632 free_page_is_bad mm/page_alloc.c:1073 [inline] __free_pages_prepare mm/page_alloc.c:1393 [inline] free_unref_folios+0xdcc/0x1480 mm/page_alloc.c:3004 folio_batch_move_lru+0x816/0x9e0 mm/swap.c:206 __folio_batch_add_and_move+0x510/0xc50 mm/swap.c:226 folio_add_lru_vma+0x196/0x210 mm/swap.c:566 map_anon_folio_pte_nopf+0x2ee/0x5e0 mm/memory.c:5301 map_anon_folio_pte_pf+0xbe/0x260 mm/memory.c:5311 do_anonymous_page mm/memory.c:5413 [inline] do_pte_missing+0x2d48/0x33f0 mm/memory.c:4548 handle_pte_fault mm/memory.c:6411 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x1bd7/0x3170 mm/memory.c:6718 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x7fca082696d2 Code: 48 89 ca 48 c1 e2 04 48 29 ca 48 8d 0d 5f c9 3a 00 48 c1 e2 04 48 01 c2 8b 44 24 1c c6 42 20 01 89 42 24 8b 44 24 24 89 6a 28 <89> 42 78 0f b6 44 24 43 89 72 2c 88 44 19 04 8b 44 24 20 31 c9 89 RSP: 002b:00007ffc5adb04c0 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fca08616018 RDX: 00007fca08615fa0 RSI: 0000000000000003 RDI: 0000000000000000 RBP: 0000000000001cd6 R08: 00007fca08615fa0 R09: 00007ffc5adb0357 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fca08615fac R14: 00007fca08615fa8 R15: 00007fca08615fa0 BUG: Bad page state in process syz.2.1435 pfn:1af40d page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x7f14c91fe pfn:0x1af40d flags: 0x57ff00000020908(uptodate|active|owner_2|swapbacked|node=1|zone=2|lastcpupid=0x7ff) raw: 057ff00000020908 0000000000000000 dead000000000122 0000000000000000 raw: 00000007f14c91fe 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x140dca(GFP_HIGHUSER_MOVABLE|__GFP_ZERO|__GFP_COMP), pid 8851, tgid 8851 (syz.0.1434), ts 86979644815, free_ts 86967032365 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1858 prep_new_page mm/page_alloc.c:1866 [inline] get_page_from_freelist+0x24ba/0x2540 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5226 alloc_pages_mpol+0x235/0x490 mm/mempolicy.c:2490 folio_alloc_mpol_noprof+0x39/0x160 mm/mempolicy.c:2509 vma_alloc_folio_noprof+0xe1/0x1e0 mm/mempolicy.c:2544 folio_prealloc mm/memory.c:-1 [inline] alloc_anon_folio mm/memory.c:5282 [inline] do_anonymous_page mm/memory.c:5376 [inline] do_pte_missing+0x159d/0x33f0 mm/memory.c:4548 handle_pte_fault mm/memory.c:6411 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x1bd7/0x3170 mm/memory.c:6718 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 page last free pid 8849 tgid 8846 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1402 [inline] free_unref_folios+0xcec/0x1480 mm/page_alloc.c:3004 folios_put_refs+0xa3d/0xb80 mm/swap.c:1042 free_pages_and_swap_cache+0x41d/0x490 mm/swap_state.c:404 __tlb_batch_free_encoded_pages mm/mmu_gather.c:138 [inline] tlb_batch_pages_flush mm/mmu_gather.c:151 [inline] tlb_flush_mmu_free mm/mmu_gather.c:417 [inline] tlb_flush_mmu+0x6d3/0xa30 mm/mmu_gather.c:424 tlb_finish_mmu+0xf9/0x230 mm/mmu_gather.c:549 exit_mmap+0x498/0x9e0 mm/mmap.c:1313 __mmput+0x118/0x430 kernel/fork.c:1178 exit_mm+0x18e/0x250 kernel/exit.c:581 do_exit+0x6a2/0x22c0 kernel/exit.c:963 do_group_exit+0x21b/0x2d0 kernel/exit.c:1117 get_signal+0x1284/0x1330 kernel/signal.c:3037 arch_do_signal_or_restart+0xbc/0x830 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline] exit_to_user_mode_loop+0x86/0x480 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:328 [inline] do_syscall_64+0x33e/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f Modules linked in: CPU: 1 UID: 0 PID: 8855 Comm: syz.2.1435 Tainted: G B syzkaller #0 PREEMPT(full) Tainted: [B]=BAD_PAGE Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 bad_page+0x17f/0x1c0 mm/page_alloc.c:632 free_page_is_bad mm/page_alloc.c:1073 [inline] __free_pages_prepare mm/page_alloc.c:1393 [inline] free_unref_folios+0xdcc/0x1480 mm/page_alloc.c:3004 folio_batch_move_lru+0x816/0x9e0 mm/swap.c:206 __folio_batch_add_and_move+0x510/0xc50 mm/swap.c:226 folio_add_lru_vma+0x196/0x210 mm/swap.c:566 map_anon_folio_pte_nopf+0x2ee/0x5e0 mm/memory.c:5301 map_anon_folio_pte_pf+0xbe/0x260 mm/memory.c:5311 do_anonymous_page mm/memory.c:5413 [inline] do_pte_missing+0x2d48/0x33f0 mm/memory.c:4548 handle_pte_fault mm/memory.c:6411 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x1bd7/0x3170 mm/memory.c:6718 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x7fca082696d2 Code: 48 89 ca 48 c1 e2 04 48 29 ca 48 8d 0d 5f c9 3a 00 48 c1 e2 04 48 01 c2 8b 44 24 1c c6 42 20 01 89 42 24 8b 44 24 24 89 6a 28 <89> 42 78 0f b6 44 24 43 89 72 2c 88 44 19 04 8b 44 24 20 31 c9 89 RSP: 002b:00007ffc5adb04c0 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fca08616018 RDX: 00007fca08615fa0 RSI: 0000000000000003 RDI: 0000000000000000 RBP: 0000000000001cd6 R08: 00007fca08615fa0 R09: 00007ffc5adb0357 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fca08615fac R14: 00007fca08615fa8 R15: 00007fca08615fa0 BUG: Bad page state in process syz.2.1435 pfn:1af408 page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x555573b20 pfn:0x1af408 flags: 0x57ff00000020908(uptodate|active|owner_2|swapbacked|node=1|zone=2|lastcpupid=0x7ff) raw: 057ff00000020908 0000000000000000 dead000000000122 0000000000000000 raw: 0000000555573b20 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 8851, tgid 8851 (syz.0.1434), ts 86979662330, free_ts 86967025854 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1858 prep_new_page mm/page_alloc.c:1866 [inline] get_page_from_freelist+0x24ba/0x2540 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5226 alloc_pages_mpol+0x235/0x490 mm/mempolicy.c:2490 folio_alloc_mpol_noprof+0x39/0x160 mm/mempolicy.c:2509 vma_alloc_folio_noprof+0xe1/0x1e0 mm/mempolicy.c:2544 folio_prealloc mm/memory.c:-1 [inline] wp_page_copy mm/memory.c:3859 [inline] do_wp_page+0x118a/0x4cc0 mm/memory.c:4320 handle_pte_fault mm/memory.c:6427 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x151d/0x3170 mm/memory.c:6718 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 page last free pid 8849 tgid 8846 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1402 [inline] free_unref_folios+0xcec/0x1480 mm/page_alloc.c:3004 folios_put_refs+0xa3d/0xb80 mm/swap.c:1042 free_pages_and_swap_cache+0x41d/0x490 mm/swap_state.c:404 __tlb_batch_free_encoded_pages mm/mmu_gather.c:138 [inline] tlb_batch_pages_flush mm/mmu_gather.c:151 [inline] tlb_flush_mmu_free mm/mmu_gather.c:417 [inline] tlb_flush_mmu+0x6d3/0xa30 mm/mmu_gather.c:424 tlb_finish_mmu+0xf9/0x230 mm/mmu_gather.c:549 exit_mmap+0x498/0x9e0 mm/mmap.c:1313 __mmput+0x118/0x430 kernel/fork.c:1178 exit_mm+0x18e/0x250 kernel/exit.c:581 do_exit+0x6a2/0x22c0 kernel/exit.c:963 do_group_exit+0x21b/0x2d0 kernel/exit.c:1117 get_signal+0x1284/0x1330 kernel/signal.c:3037 arch_do_signal_or_restart+0xbc/0x830 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline] exit_to_user_mode_loop+0x86/0x480 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:328 [inline] do_syscall_64+0x33e/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f Modules linked in: CPU: 1 UID: 0 PID: 8855 Comm: syz.2.1435 Tainted: G B syzkaller #0 PREEMPT(full) Tainted: [B]=BAD_PAGE Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 bad_page+0x17f/0x1c0 mm/page_alloc.c:632 free_page_is_bad mm/page_alloc.c:1073 [inline] __free_pages_prepare mm/page_alloc.c:1393 [inline] free_unref_folios+0xdcc/0x1480 mm/page_alloc.c:3004 folio_batch_move_lru+0x816/0x9e0 mm/swap.c:206 __folio_batch_add_and_move+0x510/0xc50 mm/swap.c:226 folio_add_lru_vma+0x196/0x210 mm/swap.c:566 map_anon_folio_pte_nopf+0x2ee/0x5e0 mm/memory.c:5301 map_anon_folio_pte_pf+0xbe/0x260 mm/memory.c:5311 do_anonymous_page mm/memory.c:5413 [inline] do_pte_missing+0x2d48/0x33f0 mm/memory.c:4548 handle_pte_fault mm/memory.c:6411 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x1bd7/0x3170 mm/memory.c:6718 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x7fca082696d2 Code: 48 89 ca 48 c1 e2 04 48 29 ca 48 8d 0d 5f c9 3a 00 48 c1 e2 04 48 01 c2 8b 44 24 1c c6 42 20 01 89 42 24 8b 44 24 24 89 6a 28 <89> 42 78 0f b6 44 24 43 89 72 2c 88 44 19 04 8b 44 24 20 31 c9 89 RSP: 002b:00007ffc5adb04c0 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fca08616018 RDX: 00007fca08615fa0 RSI: 0000000000000003 RDI: 0000000000000000 RBP: 0000000000001cd6 R08: 00007fca08615fa0 R09: 00007ffc5adb0357 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fca08615fac R14: 00007fca08615fa8 R15: 00007fca08615fa0 BUG: Bad page state in process syz.2.1435 pfn:1af412 page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x7f14c9e16 pfn:0x1af412 flags: 0x57ff00000020908(uptodate|active|owner_2|swapbacked|node=1|zone=2|lastcpupid=0x7ff) raw: 057ff00000020908 0000000000000000 dead000000000122 0000000000000000 raw: 00000007f14c9e16 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x140dca(GFP_HIGHUSER_MOVABLE|__GFP_ZERO|__GFP_COMP), pid 8851, tgid 8851 (syz.0.1434), ts 86981021345, free_ts 69887129694 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1858 prep_new_page mm/page_alloc.c:1866 [inline] get_page_from_freelist+0x24ba/0x2540 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5226 alloc_pages_mpol+0x235/0x490 mm/mempolicy.c:2490 folio_alloc_mpol_noprof+0x39/0x160 mm/mempolicy.c:2509 vma_alloc_folio_noprof+0xe1/0x1e0 mm/mempolicy.c:2544 folio_prealloc mm/memory.c:-1 [inline] alloc_anon_folio mm/memory.c:5282 [inline] do_anonymous_page mm/memory.c:5376 [inline] do_pte_missing+0x159d/0x33f0 mm/memory.c:4548 handle_pte_fault mm/memory.c:6411 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x1bd7/0x3170 mm/memory.c:6718 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 page last free pid 5831 tgid 5831 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1402 [inline] free_unref_folios+0xcec/0x1480 mm/page_alloc.c:3004 folios_put_refs+0xa3d/0xb80 mm/swap.c:1042 free_pages_and_swap_cache+0x41d/0x490 mm/swap_state.c:404 __tlb_batch_free_encoded_pages mm/mmu_gather.c:138 [inline] tlb_batch_pages_flush mm/mmu_gather.c:151 [inline] tlb_flush_mmu_free mm/mmu_gather.c:417 [inline] tlb_flush_mmu+0x6d3/0xa30 mm/mmu_gather.c:424 tlb_finish_mmu+0xf9/0x230 mm/mmu_gather.c:549 unmap_region+0x2a5/0x330 mm/vma.c:491 vms_clear_ptes mm/vma.c:1303 [inline] vms_complete_munmap_vmas+0x493/0xc60 mm/vma.c:1345 do_vmi_align_munmap+0x3b7/0x4b0 mm/vma.c:1604 do_vmi_munmap+0x252/0x2d0 mm/vma.c:1652 __vm_munmap+0x22c/0x3d0 mm/vma.c:3285 __do_sys_munmap mm/mmap.c:1079 [inline] __se_sys_munmap mm/mmap.c:1076 [inline] __x64_sys_munmap+0x60/0x70 mm/mmap.c:1076 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Modules linked in: CPU: 1 UID: 0 PID: 8855 Comm: syz.2.1435 Tainted: G B syzkaller #0 PREEMPT(full) Tainted: [B]=BAD_PAGE Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 bad_page+0x17f/0x1c0 mm/page_alloc.c:632 free_page_is_bad mm/page_alloc.c:1073 [inline] __free_pages_prepare mm/page_alloc.c:1393 [inline] free_unref_folios+0xdcc/0x1480 mm/page_alloc.c:3004 folio_batch_move_lru+0x816/0x9e0 mm/swap.c:206 __folio_batch_add_and_move+0x510/0xc50 mm/swap.c:226 folio_add_lru_vma+0x196/0x210 mm/swap.c:566 map_anon_folio_pte_nopf+0x2ee/0x5e0 mm/memory.c:5301 map_anon_folio_pte_pf+0xbe/0x260 mm/memory.c:5311 do_anonymous_page mm/memory.c:5413 [inline] do_pte_missing+0x2d48/0x33f0 mm/memory.c:4548 handle_pte_fault mm/memory.c:6411 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x1bd7/0x3170 mm/memory.c:6718 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x7fca082696d2 Code: 48 89 ca 48 c1 e2 04 48 29 ca 48 8d 0d 5f c9 3a 00 48 c1 e2 04 48 01 c2 8b 44 24 1c c6 42 20 01 89 42 24 8b 44 24 24 89 6a 28 <89> 42 78 0f b6 44 24 43 89 72 2c 88 44 19 04 8b 44 24 20 31 c9 89 RSP: 002b:00007ffc5adb04c0 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fca08616018 RDX: 00007fca08615fa0 RSI: 0000000000000003 RDI: 0000000000000000 RBP: 0000000000001cd6 R08: 00007fca08615fa0 R09: 00007ffc5adb0357 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fca08615fac R14: 00007fca08615fa8 R15: 00007fca08615fa0 BUG: Bad page state in process syz.2.1435 pfn:1af413 page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x7f14c9e17 pfn:0x1af413 flags: 0x57ff00000020908(uptodate|active|owner_2|swapbacked|node=1|zone=2|lastcpupid=0x7ff) raw: 057ff00000020908 0000000000000000 dead000000000122 0000000000000000 raw: 00000007f14c9e17 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 8851, tgid 8851 (syz.0.1434), ts 86981071632, free_ts 69887133292 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1858 prep_new_page mm/page_alloc.c:1866 [inline] get_page_from_freelist+0x24ba/0x2540 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5226 alloc_pages_mpol+0x235/0x490 mm/mempolicy.c:2490 folio_alloc_mpol_noprof+0x39/0x160 mm/mempolicy.c:2509 vma_alloc_folio_noprof+0xe1/0x1e0 mm/mempolicy.c:2544 folio_prealloc mm/memory.c:-1 [inline] wp_page_copy mm/memory.c:3859 [inline] do_wp_page+0x118a/0x4cc0 mm/memory.c:4320 handle_pte_fault mm/memory.c:6427 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x151d/0x3170 mm/memory.c:6718 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 page last free pid 5831 tgid 5831 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1402 [inline] free_unref_folios+0xcec/0x1480 mm/page_alloc.c:3004 folios_put_refs+0xa3d/0xb80 mm/swap.c:1042 free_pages_and_swap_cache+0x41d/0x490 mm/swap_state.c:404 __tlb_batch_free_encoded_pages mm/mmu_gather.c:138 [inline] tlb_batch_pages_flush mm/mmu_gather.c:151 [inline] tlb_flush_mmu_free mm/mmu_gather.c:417 [inline] tlb_flush_mmu+0x6d3/0xa30 mm/mmu_gather.c:424 tlb_finish_mmu+0xf9/0x230 mm/mmu_gather.c:549 unmap_region+0x2a5/0x330 mm/vma.c:491 vms_clear_ptes mm/vma.c:1303 [inline] vms_complete_munmap_vmas+0x493/0xc60 mm/vma.c:1345 do_vmi_align_munmap+0x3b7/0x4b0 mm/vma.c:1604 do_vmi_munmap+0x252/0x2d0 mm/vma.c:1652 __vm_munmap+0x22c/0x3d0 mm/vma.c:3285 __do_sys_munmap mm/mmap.c:1079 [inline] __se_sys_munmap mm/mmap.c:1076 [inline] __x64_sys_munmap+0x60/0x70 mm/mmap.c:1076 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Modules linked in: CPU: 1 UID: 0 PID: 8855 Comm: syz.2.1435 Tainted: G B syzkaller #0 PREEMPT(full) Tainted: [B]=BAD_PAGE Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 bad_page+0x17f/0x1c0 mm/page_alloc.c:632 free_page_is_bad mm/page_alloc.c:1073 [inline] __free_pages_prepare mm/page_alloc.c:1393 [inline] free_unref_folios+0xdcc/0x1480 mm/page_alloc.c:3004 folio_batch_move_lru+0x816/0x9e0 mm/swap.c:206 __folio_batch_add_and_move+0x510/0xc50 mm/swap.c:226 folio_add_lru_vma+0x196/0x210 mm/swap.c:566 map_anon_folio_pte_nopf+0x2ee/0x5e0 mm/memory.c:5301 map_anon_folio_pte_pf+0xbe/0x260 mm/memory.c:5311 do_anonymous_page mm/memory.c:5413 [inline] do_pte_missing+0x2d48/0x33f0 mm/memory.c:4548 handle_pte_fault mm/memory.c:6411 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x1bd7/0x3170 mm/memory.c:6718 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x7fca082696d2 Code: 48 89 ca 48 c1 e2 04 48 29 ca 48 8d 0d 5f c9 3a 00 48 c1 e2 04 48 01 c2 8b 44 24 1c c6 42 20 01 89 42 24 8b 44 24 24 89 6a 28 <89> 42 78 0f b6 44 24 43 89 72 2c 88 44 19 04 8b 44 24 20 31 c9 89 RSP: 002b:00007ffc5adb04c0 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fca08616018 RDX: 00007fca08615fa0 RSI: 0000000000000003 RDI: 0000000000000000 RBP: 0000000000001cd6 R08: 00007fca08615fa0 R09: 00007ffc5adb0357 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fca08615fac R14: 00007fca08615fa8 R15: 00007fca08615fa0 BUG: Bad page state in process syz.2.1435 pfn:1af414 page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x7f14c9e12 pfn:0x1af414 flags: 0x57ff00000020908(uptodate|active|owner_2|swapbacked|node=1|zone=2|lastcpupid=0x7ff) raw: 057ff00000020908 0000000000000000 dead000000000122 0000000000000000 raw: 00000007f14c9e12 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 8851, tgid 8851 (syz.0.1434), ts 86982688821, free_ts 69887137521 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1858 prep_new_page mm/page_alloc.c:1866 [inline] get_page_from_freelist+0x24ba/0x2540 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5226 alloc_pages_mpol+0x235/0x490 mm/mempolicy.c:2490 folio_alloc_mpol_noprof+0x39/0x160 mm/mempolicy.c:2509 vma_alloc_folio_noprof+0xe1/0x1e0 mm/mempolicy.c:2544 folio_prealloc mm/memory.c:-1 [inline] wp_page_copy mm/memory.c:3859 [inline] do_wp_page+0x118a/0x4cc0 mm/memory.c:4320 handle_pte_fault mm/memory.c:6427 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x151d/0x3170 mm/memory.c:6718 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 page last free pid 5831 tgid 5831 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1402 [inline] free_unref_folios+0xcec/0x1480 mm/page_alloc.c:3004 folios_put_refs+0xa3d/0xb80 mm/swap.c:1042 free_pages_and_swap_cache+0x41d/0x490 mm/swap_state.c:404 __tlb_batch_free_encoded_pages mm/mmu_gather.c:138 [inline] tlb_batch_pages_flush mm/mmu_gather.c:151 [inline] tlb_flush_mmu_free mm/mmu_gather.c:417 [inline] tlb_flush_mmu+0x6d3/0xa30 mm/mmu_gather.c:424 tlb_finish_mmu+0xf9/0x230 mm/mmu_gather.c:549 unmap_region+0x2a5/0x330 mm/vma.c:491 vms_clear_ptes mm/vma.c:1303 [inline] vms_complete_munmap_vmas+0x493/0xc60 mm/vma.c:1345 do_vmi_align_munmap+0x3b7/0x4b0 mm/vma.c:1604 do_vmi_munmap+0x252/0x2d0 mm/vma.c:1652 __vm_munmap+0x22c/0x3d0 mm/vma.c:3285 __do_sys_munmap mm/mmap.c:1079 [inline] __se_sys_munmap mm/mmap.c:1076 [inline] __x64_sys_munmap+0x60/0x70 mm/mmap.c:1076 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Modules linked in: CPU: 1 UID: 0 PID: 8855 Comm: syz.2.1435 Tainted: G B syzkaller #0 PREEMPT(full) Tainted: [B]=BAD_PAGE Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 bad_page+0x17f/0x1c0 mm/page_alloc.c:632 free_page_is_bad mm/page_alloc.c:1073 [inline] __free_pages_prepare mm/page_alloc.c:1393 [inline] free_unref_folios+0xdcc/0x1480 mm/page_alloc.c:3004 folio_batch_move_lru+0x816/0x9e0 mm/swap.c:206 __folio_batch_add_and_move+0x510/0xc50 mm/swap.c:226 folio_add_lru_vma+0x196/0x210 mm/swap.c:566 map_anon_folio_pte_nopf+0x2ee/0x5e0 mm/memory.c:5301 map_anon_folio_pte_pf+0xbe/0x260 mm/memory.c:5311 do_anonymous_page mm/memory.c:5413 [inline] do_pte_missing+0x2d48/0x33f0 mm/memory.c:4548 handle_pte_fault mm/memory.c:6411 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x1bd7/0x3170 mm/memory.c:6718 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x7fca082696d2 Code: 48 89 ca 48 c1 e2 04 48 29 ca 48 8d 0d 5f c9 3a 00 48 c1 e2 04 48 01 c2 8b 44 24 1c c6 42 20 01 89 42 24 8b 44 24 24 89 6a 28 <89> 42 78 0f b6 44 24 43 89 72 2c 88 44 19 04 8b 44 24 20 31 c9 89 RSP: 002b:00007ffc5adb04c0 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fca08616018 RDX: 00007fca08615fa0 RSI: 0000000000000003 RDI: 0000000000000000 RBP: 0000000000001cd6 R08: 00007fca08615fa0 R09: 00007ffc5adb0357 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fca08615fac R14: 00007fca08615fa8 R15: 00007fca08615fa0 *** BUG: Bad page state in do_wp_page tree: mm-new URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/akpm/mm.git base: c9183ec6e2e3bd26a017392d6c3eaa40c580f153 arch: amd64 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 config: https://ci.syzbot.org/builds/4d1a53f4-f506-4ba9-a8c2-a48196f95abc/config syz repro: https://ci.syzbot.org/findings/5db96cfa-fea0-4d9d-9b97-6924026375b7/syz_repro BUG: Bad page state: 5753 messages suppressed BUG: Bad page state in process syz-executor pfn:11e4a5 page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x7f4658e12 pfn:0x11e4a5 flags: 0x17ff00000020908(uptodate|active|owner_2|swapbacked|node=0|zone=2|lastcpupid=0x7ff) raw: 017ff00000020908 0000000000000000 dead000000000122 0000000000000000 raw: 00000007f4658e12 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 6083, tgid 6083 (syz.1.50), ts 86214702085, free_ts 66376409073 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1858 prep_new_page mm/page_alloc.c:1866 [inline] get_page_from_freelist+0x24ba/0x2540 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5226 alloc_pages_mpol+0x235/0x490 mm/mempolicy.c:2490 folio_alloc_mpol_noprof+0x39/0x160 mm/mempolicy.c:2509 vma_alloc_folio_noprof+0xe1/0x1e0 mm/mempolicy.c:2544 folio_prealloc mm/memory.c:-1 [inline] wp_page_copy mm/memory.c:3859 [inline] do_wp_page+0x118a/0x4cc0 mm/memory.c:4320 handle_pte_fault mm/memory.c:6427 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x151d/0x3170 mm/memory.c:6718 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 page last free pid 5817 tgid 5790 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1402 [inline] __free_frozen_pages+0xbc7/0xd30 mm/page_alloc.c:2943 __folio_put+0x4a2/0x580 mm/swap.c:112 folio_put include/linux/mm.h:2090 [inline] migrate_folio_done mm/migrate.c:1201 [inline] migrate_folio_move mm/migrate.c:1432 [inline] migrate_folios_move mm/migrate.c:1740 [inline] migrate_pages_batch+0x3dac/0x4ca0 mm/migrate.c:1996 migrate_pages+0x1e02/0x2a10 mm/migrate.c:2130 migrate_misplaced_folio+0x273/0x720 mm/migrate.c:2751 do_numa_page mm/memory.c:6199 [inline] handle_pte_fault mm/memory.c:6417 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x20ea/0x3170 mm/memory.c:6718 do_user_addr_fault+0x75b/0x1340 arch/x86/mm/fault.c:1385 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 Modules linked in: CPU: 0 UID: 0 PID: 6089 Comm: syz-executor Tainted: G B syzkaller #0 PREEMPT(full) Tainted: [B]=BAD_PAGE Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 bad_page+0x17f/0x1c0 mm/page_alloc.c:632 free_page_is_bad mm/page_alloc.c:1073 [inline] __free_pages_prepare mm/page_alloc.c:1393 [inline] free_unref_folios+0xdcc/0x1480 mm/page_alloc.c:3004 folio_batch_move_lru+0x816/0x9e0 mm/swap.c:206 __folio_batch_add_and_move+0x510/0xc50 mm/swap.c:226 folio_add_lru_vma+0x196/0x210 mm/swap.c:566 wp_page_copy mm/memory.c:3927 [inline] do_wp_page+0x3deb/0x4cc0 mm/memory.c:4320 handle_pte_fault mm/memory.c:6427 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0x151d/0x3170 mm/memory.c:6718 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x7f4658b61da7 Code: 00 00 00 80 3d 51 aa de 00 00 0f 84 b4 00 00 00 48 c7 c0 e0 ff ff ff c7 05 4a aa de 00 00 00 00 00 64 48 8b 08 48 85 c9 74 0b <48> c7 81 80 08 00 00 01 00 00 00 48 c7 05 23 aa de 00 00 00 00 00 RSP: 002b:00007ffc5850f508 EFLAGS: 00010202 RAX: ffffffffffffffe0 RBX: 0000000000000000 RCX: 00007f4658dece20 RDX: 0000000000000000 RSI: 00007f4658c52ee0 RDI: 00007f4659948060 RBP: 00007ffc5850f66c R08: 00007f4659948060 R09: 0000000000000000 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000001 R13: 00000000000927c0 R14: 0000000000015068 R15: 00007ffc5850f6c0 *** If these findings have caused you to resend the series or submit a separate fix, please add the following tag to your commit message: Tested-by: syzbot@syzkaller.appspotmail.com --- This report is generated by a bot. 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