================================================================== BUG: KASAN: slab-use-after-free in trylock_clear_pending kernel/locking/qspinlock_paravirt.h:124 [inline] BUG: KASAN: slab-use-after-free in pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:431 [inline] BUG: KASAN: slab-use-after-free in __pv_queued_spin_lock_slowpath+0x806/0xdb0 kernel/locking/qspinlock.c:508 Read of size 1 at addr ffff88805b181e40 by task syz.1.886/10376 CPU: 0 UID: 0 PID: 10376 Comm: syz.1.886 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 trylock_clear_pending kernel/locking/qspinlock_paravirt.h:124 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:431 [inline] __pv_queued_spin_lock_slowpath+0x806/0xdb0 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] zap_pte_range mm/memory.c:1727 [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+0xaaa/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 RIP: 0033:0x7fe66cd7ff19 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:00007fe66db62058 EFLAGS: 00000246 ORIG_RAX: 000000000000001c RAX: ffffffffffffffda RBX: 00007fe66cf46160 RCX: 00007fe66cd7ff19 RDX: 0000000000000018 RSI: 0000000000c00003 RDI: 0000000020000000 RBP: 00007fe66cdf3cc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007fe66cf46160 R15: 00007ffe2b337c38 Allocated by task 10373: 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 do_user_addr_fault arch/x86/mm/fault.c:1338 [inline] handle_page_fault arch/x86/mm/fault.c:1481 [inline] exc_page_fault+0x459/0x8b0 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 Freed by task 10374: 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 ffff88805b181e40 which belongs to the cache page->ptl of size 64 The buggy address is located 0 bytes inside of freed 64-byte region [ffff88805b181e40, ffff88805b181e80) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5b181 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000000 ffff88801ac4f780 ffffea0000d3d240 dead000000000004 raw: 0000000000000000 00000000802a002a 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 9397, tgid 9397 (sed), ts 392173368932, free_ts 392155805084 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 mm/memory.c:7026 [inline] ptlock_init include/linux/mm.h:2971 [inline] pmd_ptlock_init include/linux/mm.h:3078 [inline] pagetable_pmd_ctor include/linux/mm.h:3116 [inline] pmd_alloc_one_noprof include/asm-generic/pgalloc.h:141 [inline] __pmd_alloc+0x10b/0x670 mm/memory.c:6436 pmd_alloc include/linux/mm.h:2862 [inline] alloc_new_pmd mm/mremap.c:96 [inline] move_page_tables+0x1bab/0x1e10 mm/mremap.c:624 relocate_vma_down+0x3dc/0x600 mm/mmap.c:1691 setup_arg_pages+0x6e9/0xc30 fs/exec.c:802 load_elf_binary+0xb62/0x2770 fs/binfmt_elf.c:1020 search_binary_handler fs/exec.c:1736 [inline] exec_binprm fs/exec.c:1768 [inline] bprm_execve+0x93f/0x13a0 fs/exec.c:1820 do_execveat_common+0x57f/0x710 fs/exec.c:1927 do_execve fs/exec.c:2001 [inline] __do_sys_execve fs/exec.c:2077 [inline] __se_sys_execve fs/exec.c:2072 [inline] __x64_sys_execve+0x92/0xb0 fs/exec.c:2072 page last free pid 51 tgid 51 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 vfree+0x186/0x2e0 mm/vmalloc.c:3382 delayed_vfree_work+0x56/0x80 mm/vmalloc.c:3303 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Memory state around the buggy address: ffff88805b181d00: fc fc fc fc fa fb fb fb fb fb fb fb fc fc fc fc ffff88805b181d80: 00 00 00 00 00 00 00 00 fc fc fc fc 00 00 00 00 >ffff88805b181e00: 00 00 00 00 fc fc fc fc fa fb fb fb fb fb fb fb ^ ffff88805b181e80: fc fc fc fc fa fb fb fb fb fb fb fb fc fc fc fc ffff88805b181f00: fa fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb ==================================================================