================================================================== BUG: KASAN: slab-use-after-free in set_pending kernel/locking/qspinlock_paravirt.h:112 [inline] BUG: KASAN: slab-use-after-free in pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:429 [inline] BUG: KASAN: slab-use-after-free in __pv_queued_spin_lock_slowpath+0x90b/0xdb0 kernel/locking/qspinlock.c:508 Write of size 1 at addr ffff88804eb57961 by task syz.0.411/8961 CPU: 0 UID: 0 PID: 8961 Comm: syz.0.411 Not tainted 6.13.0-rc1-next-20241205-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x169/0x550 mm/kasan/report.c:489 kasan_report+0x143/0x180 mm/kasan/report.c:602 set_pending kernel/locking/qspinlock_paravirt.h:112 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:429 [inline] __pv_queued_spin_lock_slowpath+0x90b/0xdb0 kernel/locking/qspinlock.c:508 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:584 [inline] queued_spin_lock_slowpath+0x42/0x50 arch/x86/include/asm/qspinlock.h:51 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x272/0x370 kernel/locking/spinlock_debug.c:116 spin_lock include/linux/spinlock.h:351 [inline] __pte_offset_map_lock+0x1ba/0x300 mm/pgtable-generic.c:402 pte_offset_map_lock include/linux/mm.h:3027 [inline] map_pte mm/page_vma_mapped.c:23 [inline] page_vma_mapped_walk+0x1578/0x1f10 mm/page_vma_mapped.c:288 remove_migration_pte+0x3a7/0x26b0 mm/migrate.c:253 rmap_walk_anon+0x4be/0x720 mm/rmap.c:2646 remove_migration_ptes mm/migrate.c:373 [inline] migrate_folio_move mm/migrate.c:1387 [inline] migrate_pages_batch+0x209f/0x2a90 mm/migrate.c:1897 migrate_pages_sync mm/migrate.c:1963 [inline] migrate_pages+0x1d57/0x3380 mm/migrate.c:2072 do_mbind mm/mempolicy.c:1394 [inline] kernel_mbind mm/mempolicy.c:1537 [inline] __do_sys_mbind mm/mempolicy.c:1611 [inline] __se_sys_mbind+0x14b8/0x1980 mm/mempolicy.c:1607 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f155b97fed9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f155c6c8058 EFLAGS: 00000246 ORIG_RAX: 00000000000000ed RAX: ffffffffffffffda RBX: 00007f155bb46240 RCX: 00007f155b97fed9 RDX: 0000000000000000 RSI: 0000000000800000 RDI: 0000000020001000 RBP: 00007f155b9f3cc8 R08: 0000000000000000 R09: 0000000000000002 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f155bb46240 R15: 00007ffd98377ec8 Allocated by task 8948: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4104 [inline] slab_alloc_node mm/slub.c:4153 [inline] kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4160 ptlock_alloc+0x20/0x70 mm/memory.c:7026 ptlock_init include/linux/mm.h:2971 [inline] pagetable_pte_ctor include/linux/mm.h:2998 [inline] __pte_alloc_one_noprof include/asm-generic/pgalloc.h:73 [inline] pte_alloc_one+0xd3/0x510 arch/x86/mm/pgtable.c:41 __pte_alloc+0x79/0x3c0 mm/memory.c:446 do_anonymous_page mm/memory.c:4848 [inline] do_pte_missing mm/memory.c:4046 [inline] handle_pte_fault+0x4d4b/0x5ee0 mm/memory.c:5872 __handle_mm_fault mm/memory.c:6015 [inline] handle_mm_fault+0x1106/0x1bb0 mm/memory.c:6183 faultin_page mm/gup.c:1200 [inline] __get_user_pages+0x1b31/0x4370 mm/gup.c:1495 populate_vma_page_range+0x264/0x330 mm/gup.c:1933 __mm_populate+0x27a/0x460 mm/gup.c:2036 do_mlock+0x6cc/0x850 mm/mlock.c:653 __do_sys_mlock mm/mlock.c:661 [inline] __se_sys_mlock mm/mlock.c:659 [inline] __x64_sys_mlock+0x60/0x70 mm/mlock.c:659 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 8944: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2338 [inline] slab_free mm/slub.c:4598 [inline] kmem_cache_free+0x195/0x410 mm/slub.c:4700 pagetable_pte_dtor include/linux/mm.h:3009 [inline] ___pte_free_tlb+0x2b/0x140 arch/x86/mm/pgtable.c:63 __pte_free_tlb arch/x86/include/asm/pgalloc.h:61 [inline] free_pte+0x142/0x190 mm/pt_reclaim.c:31 zap_pte_range mm/memory.c:1780 [inline] zap_pmd_range mm/memory.c:1822 [inline] zap_pud_range mm/memory.c:1851 [inline] zap_p4d_range mm/memory.c:1872 [inline] unmap_page_range+0x4062/0x48d0 mm/memory.c:1893 zap_page_range_single+0x45c/0x630 mm/memory.c:2018 madvise_dontneed_single_vma mm/madvise.c:859 [inline] madvise_dontneed_free mm/madvise.c:940 [inline] madvise_vma_behavior mm/madvise.c:1270 [inline] madvise_walk_vmas mm/madvise.c:1502 [inline] do_madvise+0x2774/0x4d90 mm/madvise.c:1689 __do_sys_madvise mm/madvise.c:1705 [inline] __se_sys_madvise mm/madvise.c:1703 [inline] __x64_sys_madvise+0xa6/0xc0 mm/madvise.c:1703 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88804eb57960 which belongs to the cache page->ptl of size 64 The buggy address is located 1 bytes inside of freed 64-byte region [ffff88804eb57960, ffff88804eb579a0) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4eb57 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000000 ffff88801ac4f780 dead000000000122 0000000000000000 raw: 0000000000000000 00000000002a002a 00000000f5000000 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 8913, tgid 8913 (syz-executor), ts 261948893226, free_ts 261898626237 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1549 prep_new_page mm/page_alloc.c:1557 [inline] get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3475 __alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4752 alloc_pages_mpol+0x30e/0x550 mm/mempolicy.c:2270 alloc_slab_page mm/slub.c:2408 [inline] allocate_slab+0x8f/0x3a0 mm/slub.c:2574 new_slab mm/slub.c:2627 [inline] ___slab_alloc+0xc27/0x14a0 mm/slub.c:3815 __slab_alloc+0x58/0xa0 mm/slub.c:3905 __slab_alloc_node mm/slub.c:3980 [inline] slab_alloc_node mm/slub.c:4141 [inline] kmem_cache_alloc_noprof+0x268/0x380 mm/slub.c:4160 ptlock_alloc+0x20/0x70 mm/memory.c:7026 ptlock_init include/linux/mm.h:2971 [inline] pagetable_pte_ctor include/linux/mm.h:2998 [inline] __pte_alloc_one_noprof include/asm-generic/pgalloc.h:73 [inline] pte_alloc_one+0xd3/0x510 arch/x86/mm/pgtable.c:41 __pte_alloc+0x79/0x3c0 mm/memory.c:446 copy_pte_range mm/memory.c:1106 [inline] copy_pmd_range+0x6fb4/0x77a0 mm/memory.c:1261 copy_pud_range mm/memory.c:1298 [inline] copy_p4d_range mm/memory.c:1322 [inline] copy_page_range+0x99f/0xe90 mm/memory.c:1420 dup_mmap kernel/fork.c:751 [inline] dup_mm kernel/fork.c:1693 [inline] copy_mm+0x12d2/0x2060 kernel/fork.c:1742 copy_process+0x1845/0x3d80 kernel/fork.c:2393 kernel_clone+0x226/0x8e0 kernel/fork.c:2805 page last free pid 5204 tgid 5204 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_frozen_pages+0xe0d/0x10e0 mm/page_alloc.c:2658 discard_slab mm/slub.c:2673 [inline] __put_partials+0x160/0x1c0 mm/slub.c:3142 put_cpu_partial+0x17c/0x250 mm/slub.c:3217 __slab_free+0x290/0x380 mm/slub.c:4468 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4104 [inline] slab_alloc_node mm/slub.c:4153 [inline] kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4160 getname_flags+0xb7/0x540 fs/namei.c:139 do_readlinkat+0xd8/0x3a0 fs/stat.c:561 __do_sys_readlink fs/stat.c:599 [inline] __se_sys_readlink fs/stat.c:596 [inline] __x64_sys_readlink+0x7f/0x90 fs/stat.c:596 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88804eb57800: fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb fb ffff88804eb57880: fc fc fc fc fa fb fb fb fb fb fb fb fc fc fc fc >ffff88804eb57900: fa fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb ^ ffff88804eb57980: fb fb fb fb fc fc fc fc 00 00 00 00 00 00 00 00 ffff88804eb57a00: fc fc fc fc 00 00 00 00 00 00 00 00 fc fc fc fc ==================================================================