================================================================== BUG: KASAN: slab-use-after-free in ptep_get include/linux/pgtable.h:317 [inline] BUG: KASAN: slab-use-after-free in ptep_get_lockless include/linux/pgtable.h:581 [inline] BUG: KASAN: slab-use-after-free in pte_range_none mm/memory.c:4407 [inline] BUG: KASAN: slab-use-after-free in finish_fault+0x8b9/0xe90 mm/memory.c:4903 Read of size 8 at addr ffff88807d3e6000 by task syz-executor.4/5327 CPU: 1 PID: 5327 Comm: syz-executor.4 Not tainted 6.10.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x280 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 ptep_get include/linux/pgtable.h:317 [inline] ptep_get_lockless include/linux/pgtable.h:581 [inline] pte_range_none mm/memory.c:4407 [inline] finish_fault+0x8b9/0xe90 mm/memory.c:4903 do_read_fault mm/memory.c:5050 [inline] do_fault mm/memory.c:5176 [inline] do_pte_missing mm/memory.c:3950 [inline] handle_pte_fault mm/memory.c:5500 [inline] __handle_mm_fault+0x142c/0x5b30 mm/memory.c:5643 handle_mm_fault+0x122/0x470 mm/memory.c:5808 faultin_page mm/gup.c:1339 [inline] __get_user_pages+0x74f/0x1180 mm/gup.c:1638 populate_vma_page_range+0x1bc/0x260 mm/gup.c:2078 __mm_populate+0x21c/0x380 mm/gup.c:2181 mm_populate include/linux/mm.h:3441 [inline] __do_sys_remap_file_pages mm/mmap.c:3177 [inline] __se_sys_remap_file_pages+0x681/0x850 mm/mmap.c:3103 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x8d/0x170 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7fdb67cf69 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f7fdc4790c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d8 RAX: ffffffffffffffda RBX: 00007f7fdb7b4050 RCX: 00007f7fdb67cf69 RDX: 0000000000000000 RSI: 0000000000200000 RDI: 00000000202ec000 RBP: 00007f7fdb6da6fe R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000006 R14: 00007f7fdb7b4050 R15: 00007ffdd5234cb8 Allocated by task 4924: 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:312 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3941 [inline] slab_alloc_node mm/slub.c:4001 [inline] kmem_cache_alloc_noprof+0x12b/0x350 mm/slub.c:4008 vma_lock_alloc kernel/fork.c:441 [inline] vm_area_dup+0x5b/0x160 kernel/fork.c:494 __split_vma+0xfe/0xa30 mm/mmap.c:2435 do_vmi_align_munmap+0x32a/0x13c0 mm/mmap.c:2633 do_vmi_munmap+0x1c4/0x230 mm/mmap.c:2800 mmap_region+0x607/0x19a0 mm/mmap.c:2851 do_mmap+0x6b6/0xc20 mm/mmap.c:1438 vm_mmap_pgoff+0x1aa/0x320 mm/util.c:573 ksys_mmap_pgoff+0x2d2/0x3f0 mm/mmap.c:1484 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x8d/0x170 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 4924: 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:579 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2196 [inline] slab_free mm/slub.c:4437 [inline] kmem_cache_free+0x12c/0x3b0 mm/slub.c:4512 vma_lock_free kernel/fork.c:453 [inline] __vm_area_free+0x66/0x80 kernel/fork.c:509 remove_vma mm/mmap.c:187 [inline] exit_mmap+0x51d/0x950 mm/mmap.c:3406 __mmput+0x9b/0x2d0 kernel/fork.c:1346 exit_mm+0x114/0x1b0 kernel/exit.c:565 do_exit+0x7d5/0x2550 kernel/exit.c:861 do_group_exit+0x1ba/0x280 kernel/exit.c:1023 __do_sys_exit_group kernel/exit.c:1034 [inline] __se_sys_exit_group kernel/exit.c:1032 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1032 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x8d/0x170 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88807d3e6000 which belongs to the cache vma_lock of size 152 The buggy address is located 0 bytes inside of freed 152-byte region [ffff88807d3e6000, ffff88807d3e6098) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88807d3e6798 pfn:0x7d3e6 memcg:ffff8880158d5801 flags: 0xfff00000000200(workingset|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xfdffffff(slab) raw: 00fff00000000200 ffff88800a2dbc80 ffffea00005c8d50 ffffea0001f3e210 raw: ffff88807d3e6798 0000000000120005 00000001fdffffff ffff8880158d5801 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x152cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 1968, tgid 1968 (modprobe), ts 27069492018, free_ts 27069464461 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x10f/0x130 mm/page_alloc.c:1470 prep_new_page mm/page_alloc.c:1478 [inline] get_page_from_freelist+0x2c3f/0x2cf0 mm/page_alloc.c:3421 __alloc_pages_noprof+0x256/0x670 mm/page_alloc.c:4679 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2265 allocate_slab+0x5d/0x290 mm/slub.c:2428 new_slab mm/slub.c:2481 [inline] ___slab_alloc+0xa7f/0x11d0 mm/slub.c:3667 __slab_alloc mm/slub.c:3757 [inline] __slab_alloc_node mm/slub.c:3810 [inline] slab_alloc_node mm/slub.c:3989 [inline] kmem_cache_alloc_noprof+0x1eb/0x350 mm/slub.c:4008 vma_lock_alloc kernel/fork.c:441 [inline] vm_area_alloc+0x109/0x1c0 kernel/fork.c:472 mmap_region+0xa36/0x19a0 mm/mmap.c:2914 do_mmap+0x6b6/0xc20 mm/mmap.c:1438 vm_mmap_pgoff+0x1aa/0x320 mm/util.c:573 elf_map fs/binfmt_elf.c:381 [inline] elf_load+0x11d/0x520 fs/binfmt_elf.c:408 load_elf_binary+0xd99/0x2390 fs/binfmt_elf.c:1132 search_binary_handler fs/exec.c:1797 [inline] exec_binprm fs/exec.c:1839 [inline] bprm_execve+0x891/0x12f0 fs/exec.c:1891 kernel_execve+0x532/0x610 fs/exec.c:2058 call_usermodehelper_exec_async+0x204/0x320 kernel/umh.c:110 page last free pid 1968 tgid 1968 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1089 [inline] free_unref_folios+0xd99/0x16d0 mm/page_alloc.c:2633 folios_put_refs+0x4cc/0x5b0 mm/swap.c:1020 free_pages_and_swap_cache+0x415/0x4e0 mm/swap_state.c:335 __tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline] tlb_batch_pages_flush mm/mmu_gather.c:149 [inline] tlb_flush_mmu_free mm/mmu_gather.c:366 [inline] tlb_flush_mmu+0x2ad/0x4e0 mm/mmu_gather.c:373 tlb_finish_mmu+0xb6/0x1c0 mm/mmu_gather.c:465 shift_arg_pages fs/exec.c:750 [inline] setup_arg_pages+0xb44/0xda0 fs/exec.c:849 load_elf_binary+0xa59/0x2390 fs/binfmt_elf.c:1013 search_binary_handler fs/exec.c:1797 [inline] exec_binprm fs/exec.c:1839 [inline] bprm_execve+0x891/0x12f0 fs/exec.c:1891 kernel_execve+0x532/0x610 fs/exec.c:2058 call_usermodehelper_exec_async+0x204/0x320 kernel/umh.c:110 ret_from_fork+0x32/0x60 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: ffff88807d3e5f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88807d3e5f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88807d3e6000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807d3e6080: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb ffff88807d3e6100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc 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