================================================================== BUG: KASAN: slab-use-after-free in __vma_shareable_lock include/linux/hugetlb.h:1273 [inline] BUG: KASAN: slab-use-after-free in hugetlb_vma_unlock_read mm/hugetlb.c:281 [inline] BUG: KASAN: slab-use-after-free in hugetlb_no_page mm/hugetlb.c:6383 [inline] BUG: KASAN: slab-use-after-free in hugetlb_fault+0x27b9/0x3910 mm/hugetlb.c:6487 Read of size 8 at addr ffff88801eda2ea8 by task syz-executor.0/6040 CPU: 0 PID: 6040 Comm: syz-executor.0 Not tainted 6.9.0-rc3-next-20240412-syzkaller-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 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 __vma_shareable_lock include/linux/hugetlb.h:1273 [inline] hugetlb_vma_unlock_read mm/hugetlb.c:281 [inline] hugetlb_no_page mm/hugetlb.c:6383 [inline] hugetlb_fault+0x27b9/0x3910 mm/hugetlb.c:6487 handle_mm_fault+0x18e8/0x1bb0 mm/memory.c:5701 do_user_addr_fault arch/x86/mm/fault.c:1368 [inline] handle_page_fault arch/x86/mm/fault.c:1511 [inline] exc_page_fault+0x459/0x900 arch/x86/mm/fault.c:1569 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0033:0x7fe7d8a5eeeb Code: fa 10 73 2d 83 fa 08 73 46 83 fa 04 73 16 83 fa 01 7c 10 8a 0e 74 0a 0f b7 74 16 fe 66 89 74 17 fe 88 0f c3 8b 4c 16 fc 8b 36 <89> 4c 17 fc 89 37 c3 c5 fa 6f 06 c5 fa 6f 4c 16 f0 c5 fa 7f 07 c5 RSP: 002b:00007ffd32a0d108 EFLAGS: 00010246 RAX: 0000000020000700 RBX: 00007ffd32a0d218 RCX: 000000000073666a RDX: 0000000000000004 RSI: 000000000073666a RDI: 0000000020000700 RBP: 0000000000000048 R08: 00007fe7d8a00000 R09: 00007fe7d8babf8c R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe7d86000c8 R13: fffffffffffffffe R14: 00007fe7d8600000 R15: 00007fe7d86000d0 Allocated by task 6043: 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:3897 [inline] slab_alloc_node mm/slub.c:3957 [inline] kmem_cache_alloc_noprof+0x135/0x290 mm/slub.c:3964 vm_area_alloc+0x24/0x1d0 kernel/fork.c:467 mmap_region+0xc20/0x2030 mm/mmap.c:2850 do_mmap+0x8ad/0xfa0 mm/mmap.c:1387 vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:573 ksys_mmap_pgoff+0x544/0x720 mm/mmap.c:1433 do_syscall_x64 arch/x86/entry/common.c:74 [inline] do_syscall_64+0xfa/0x250 arch/x86/entry/common.c:105 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 6043: 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:2190 [inline] slab_free mm/slub.c:4393 [inline] kmem_cache_free+0x145/0x340 mm/slub.c:4468 rcu_do_batch kernel/rcu/tree.c:2565 [inline] rcu_core+0xafd/0x1830 kernel/rcu/tree.c:2839 __do_softirq+0x2c6/0x980 kernel/softirq.c:554 Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:541 __call_rcu_common kernel/rcu/tree.c:3102 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:3206 remove_vma mm/mmap.c:148 [inline] remove_mt mm/mmap.c:2334 [inline] do_vmi_align_munmap+0x14b6/0x1870 mm/mmap.c:2675 do_vmi_munmap+0x24e/0x2d0 mm/mmap.c:2739 mmap_region+0x729/0x2030 mm/mmap.c:2790 do_mmap+0x8ad/0xfa0 mm/mmap.c:1387 vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:573 ksys_mmap_pgoff+0x544/0x720 mm/mmap.c:1433 do_syscall_x64 arch/x86/entry/common.c:74 [inline] do_syscall_64+0xfa/0x250 arch/x86/entry/common.c:105 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88801eda2e88 which belongs to the cache vm_area_struct of size 184 The buggy address is located 32 bytes inside of freed 184-byte region [ffff88801eda2e88, ffff88801eda2f40) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1eda2 memcg:ffff88801ee05801 flags: 0xfff80000000000(node=0|zone=1|lastcpupid=0xfff) page_type: 0xffffefff(slab) raw: 00fff80000000000 ffff8880162a7b40 ffffea0000899500 dead000000000004 raw: 0000000000000000 0000000000100010 00000001ffffefff ffff88801ee05801 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 5030, tgid -2004887359 (sftp-server), ts 5030, free_ts 49525412931 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1474 prep_new_page mm/page_alloc.c:1482 [inline] get_page_from_freelist+0x2ce2/0x2d90 mm/page_alloc.c:3444 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4702 __alloc_pages_node_noprof include/linux/gfp.h:244 [inline] alloc_pages_node_noprof include/linux/gfp.h:271 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2259 allocate_slab+0x5a/0x2e0 mm/slub.c:2422 new_slab mm/slub.c:2475 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3624 __slab_alloc+0x58/0xa0 mm/slub.c:3714 __slab_alloc_node mm/slub.c:3767 [inline] slab_alloc_node mm/slub.c:3945 [inline] kmem_cache_alloc_noprof+0x1c1/0x290 mm/slub.c:3964 vm_area_alloc+0x24/0x1d0 kernel/fork.c:467 mmap_region+0xc20/0x2030 mm/mmap.c:2850 do_mmap+0x8ad/0xfa0 mm/mmap.c:1387 vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:573 ksys_mmap_pgoff+0x4f1/0x720 mm/mmap.c:1433 do_syscall_x64 arch/x86/entry/common.c:74 [inline] do_syscall_64+0xfa/0x250 arch/x86/entry/common.c:105 entry_SYSCALL_64_after_hwframe+0x77/0x7f page last free pid 5030 tgid 5030 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1094 [inline] free_unref_folios+0xf23/0x19e0 mm/page_alloc.c:2656 folios_put_refs+0x93a/0xa60 mm/swap.c:1022 free_pages_and_swap_cache+0x2ea/0x690 mm/swap_state.c:329 __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+0x3a3/0x680 mm/mmu_gather.c:373 tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:465 exit_mmap+0x44f/0xc80 mm/mmap.c:3323 __mmput+0x115/0x3c0 kernel/fork.c:1346 exec_mmap+0x69d/0x730 fs/exec.c:1063 begin_new_exec+0x125f/0x1f50 fs/exec.c:1329 load_elf_binary+0x97d/0x25a0 fs/binfmt_elf.c:996 search_binary_handler fs/exec.c:1797 [inline] exec_binprm fs/exec.c:1839 [inline] bprm_execve+0xaf8/0x17c0 fs/exec.c:1891 do_execveat_common+0x553/0x700 fs/exec.c:1998 do_execve fs/exec.c:2072 [inline] __do_sys_execve fs/exec.c:2148 [inline] __se_sys_execve fs/exec.c:2143 [inline] __x64_sys_execve+0x92/0xb0 fs/exec.c:2143 do_syscall_x64 arch/x86/entry/common.c:74 [inline] do_syscall_64+0xfa/0x250 arch/x86/entry/common.c:105 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88801eda2d80: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801eda2e00: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc >ffff88801eda2e80: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88801eda2f00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff88801eda2f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================