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BUG: KASAN: use-after-free in __vma_shareable_flags_pmd mm/hugetlb.c:6809 [inline]
BUG: KASAN: use-after-free in hugetlb_vma_lock_read mm/hugetlb.c:6815 [inline]
BUG: KASAN: use-after-free in hugetlb_handle_userfault+0x236/0x250 mm/hugetlb.c:5564
Read of size 8 at addr ffff888026e0d530 by task syz-executor343/3606

CPU: 0 PID: 3606 Comm: syz-executor343 Not tainted 6.0.0-rc3-next-20220901-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:317 [inline]
 print_report.cold+0x2ba/0x719 mm/kasan/report.c:433
 kasan_report+0xb1/0x1e0 mm/kasan/report.c:495
 __vma_shareable_flags_pmd mm/hugetlb.c:6809 [inline]
 hugetlb_vma_lock_read mm/hugetlb.c:6815 [inline]
 hugetlb_handle_userfault+0x236/0x250 mm/hugetlb.c:5564
 hugetlb_no_page mm/hugetlb.c:5611 [inline]
 hugetlb_fault+0x152d/0x1e00 mm/hugetlb.c:5852
 handle_mm_fault+0x640/0x780 mm/memory.c:5188
 do_user_addr_fault+0x475/0x1210 arch/x86/mm/fault.c:1407
 handle_page_fault arch/x86/mm/fault.c:1498 [inline]
 exc_page_fault+0x94/0x170 arch/x86/mm/fault.c:1554
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7f53ced8fc3b
Code: 00 48 89 94 24 ca 03 00 00 f3 0f 6f 9c 24 c0 03 00 00 f3 0f 6f a4 24 d0 03 00 00 48 89 84 24 e2 03 00 00 48 8d 86 00 20 7a 20 <0f> 11 9e 00 20 7a 20 0f 11 a6 10 20 7a 20 48 8b b4 24 e0 03 00 00
RSP: 002b:00007f53ced82820 EFLAGS: 00010246
RAX: 00000000207a5e00 RBX: 0000000000000000 RCX: 00180f8000180f80
RDX: 0002912000180f80 RSI: 0000000000003e00 RDI: 0000000000000008
RBP: 0000000000000006 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 00007f53ced82c80 R12: 00000000207a2000
R13: 0000000000000000 R14: 0000000000000000 R15: 00007f53ced82d80
 </TASK>

Allocated by task 3606:
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:437 [inline]
 __kasan_slab_alloc+0x90/0xc0 mm/kasan/common.c:470
 kasan_slab_alloc include/linux/kasan.h:224 [inline]
 slab_post_alloc_hook mm/slab.h:737 [inline]
 slab_alloc_node mm/slub.c:3317 [inline]
 slab_alloc mm/slub.c:3325 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3332 [inline]
 kmem_cache_alloc+0x2b7/0x3d0 mm/slub.c:3341
 vm_area_alloc+0x1c/0xf0 kernel/fork.c:458
 mmap_region+0x448/0x1bf0 mm/mmap.c:2604
 do_mmap+0x825/0xf50 mm/mmap.c:1411
 vm_mmap_pgoff+0x1ab/0x270 mm/util.c:520
 ksys_mmap_pgoff+0x1c3/0x5a0 mm/mmap.c:1457
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Freed by task 3610:
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 kasan_set_track+0x21/0x30 mm/kasan/common.c:45
 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370
 ____kasan_slab_free mm/kasan/common.c:367 [inline]
 ____kasan_slab_free+0x166/0x1c0 mm/kasan/common.c:329
 kasan_slab_free include/linux/kasan.h:200 [inline]
 slab_free_hook mm/slub.c:1651 [inline]
 slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1677
 slab_free mm/slub.c:3580 [inline]
 kmem_cache_free+0xe7/0x5b0 mm/slub.c:3602
 remove_mt mm/mmap.c:2166 [inline]
 do_mas_align_munmap+0x983/0xee0 mm/mmap.c:2446
 do_mas_munmap+0x26a/0x2b0 mm/mmap.c:2501
 mmap_region+0x219/0x1bf0 mm/mmap.c:2549
 do_mmap+0x825/0xf50 mm/mmap.c:1411
 vm_mmap_pgoff+0x1ab/0x270 mm/util.c:520
 ksys_mmap_pgoff+0x1c3/0x5a0 mm/mmap.c:1457
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff888026e0d510
 which belongs to the cache vm_area_struct of size 152
The buggy address is located 32 bytes inside of
 152-byte region [ffff888026e0d510, ffff888026e0d5a8)

The buggy address belongs to the physical page:
page:ffffea00009b8340 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x26e0d
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffffea0000984fc0 dead00000000000d ffff888140006b40
raw: 0000000000000000 0000000000120012 00000001ffffffff 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 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 3314, tgid 3314 (rm), ts 24325304308, free_ts 24317978337
 prep_new_page mm/page_alloc.c:2534 [inline]
 get_page_from_freelist+0x109b/0x2ce0 mm/page_alloc.c:4284
 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5542
 alloc_pages+0x1a6/0x270 mm/mempolicy.c:2280
 alloc_slab_page mm/slub.c:1721 [inline]
 allocate_slab+0x228/0x370 mm/slub.c:1866
 new_slab mm/slub.c:1919 [inline]
 ___slab_alloc+0xad0/0x1440 mm/slub.c:3100
 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3198
 slab_alloc_node mm/slub.c:3283 [inline]
 slab_alloc mm/slub.c:3325 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3332 [inline]
 kmem_cache_alloc+0x31c/0x3d0 mm/slub.c:3341
 vm_area_alloc+0x1c/0xf0 kernel/fork.c:458
 mmap_region+0x448/0x1bf0 mm/mmap.c:2604
 do_mmap+0x825/0xf50 mm/mmap.c:1411
 vm_mmap_pgoff+0x1ab/0x270 mm/util.c:520
 ksys_mmap_pgoff+0x79/0x5a0 mm/mmap.c:1457
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1451 [inline]
 free_pcp_prepare+0x5e4/0xd20 mm/page_alloc.c:1501
 free_unref_page_prepare mm/page_alloc.c:3382 [inline]
 free_unref_page_list+0x16f/0xb90 mm/page_alloc.c:3524
 release_pages+0xc6c/0x1590 mm/swap.c:1056
 tlb_batch_pages_flush+0xa8/0x1a0 mm/mmu_gather.c:58
 tlb_flush_mmu_free mm/mmu_gather.c:255 [inline]
 tlb_flush_mmu mm/mmu_gather.c:262 [inline]
 tlb_finish_mmu+0x147/0x7e0 mm/mmu_gather.c:353
 exit_mmap+0x1fe/0x720 mm/mmap.c:3102
 __mmput+0x128/0x4c0 kernel/fork.c:1187
 mmput+0x5c/0x70 kernel/fork.c:1209
 exec_mmap fs/exec.c:1043 [inline]
 begin_new_exec+0x100c/0x2ef0 fs/exec.c:1302
 load_elf_binary+0x8e6/0x4e00 fs/binfmt_elf.c:1002
 search_binary_handler fs/exec.c:1735 [inline]
 exec_binprm fs/exec.c:1776 [inline]
 bprm_execve fs/exec.c:1845 [inline]
 bprm_execve+0x7ef/0x1960 fs/exec.c:1807
 do_execveat_common+0x724/0x890 fs/exec.c:1950
 do_execve fs/exec.c:2024 [inline]
 __do_sys_execve fs/exec.c:2100 [inline]
 __se_sys_execve fs/exec.c:2095 [inline]
 __x64_sys_execve+0x8f/0xc0 fs/exec.c:2095
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Memory state around the buggy address:
 ffff888026e0d400: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb
 ffff888026e0d480: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc
>ffff888026e0d500: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb
                                     ^
 ffff888026e0d580: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00
 ffff888026e0d600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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