==================================================================
BUG: KASAN: slab-out-of-bounds in mt_slot lib/maple_tree.c:816 [inline]
BUG: KASAN: slab-out-of-bounds in mas_slot lib/maple_tree.c:849 [inline]
BUG: KASAN: slab-out-of-bounds in mt_validate_nulls+0xc04/0xd10 lib/maple_tree.c:7172
Read of size 8 at addr ffff8880456a1300 by task syz-executor.4/1977

CPU: 1 PID: 1977 Comm: syz-executor.4 Not tainted 6.4.0-syzkaller-10173-ga901a3568fd2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:364
 print_report mm/kasan/report.c:475 [inline]
 kasan_report+0x11d/0x130 mm/kasan/report.c:588
 mt_slot lib/maple_tree.c:816 [inline]
 mas_slot lib/maple_tree.c:849 [inline]
 mt_validate_nulls+0xc04/0xd10 lib/maple_tree.c:7172
 mt_validate+0x17e3/0x4370 lib/maple_tree.c:7227
 validate_mm+0x9d/0x470 mm/mmap.c:300
 do_vmi_align_munmap+0x1199/0x1680 mm/mmap.c:2561
 do_vmi_munmap+0x266/0x430 mm/mmap.c:2619
 __vm_munmap+0x137/0x380 mm/mmap.c:2899
 __do_sys_munmap mm/mmap.c:2916 [inline]
 __se_sys_munmap mm/mmap.c:2913 [inline]
 __x64_sys_munmap+0x62/0x80 mm/mmap.c:2913
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f550208c467
Code: 00 00 00 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb 85 66 2e 0f 1f 84 00 00 00 00 00 90 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5502d41f38 EFLAGS: 00000246 ORIG_RAX: 000000000000000b
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f550208c467
RDX: 0000000000002000 RSI: 0000000000002000 RDI: 00007f54f87ff000
RBP: 00007f54f87ff000 R08: 0000000000000000 R09: 0000000000000176
R10: 0000000000002000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5502d41fdc R14: 00007f5502d41fe0 R15: 0000000020000242
 </TASK>

Allocated by task 1977:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 __kasan_slab_alloc+0x7f/0x90 mm/kasan/common.c:328
 kasan_slab_alloc include/linux/kasan.h:186 [inline]
 slab_post_alloc_hook mm/slab.h:750 [inline]
 kmem_cache_alloc_bulk+0x424/0x860 mm/slub.c:4048
 mt_alloc_bulk lib/maple_tree.c:164 [inline]
 mas_alloc_nodes+0x341/0x8b0 lib/maple_tree.c:1304
 mas_node_count_gfp lib/maple_tree.c:1362 [inline]
 mas_preallocate+0x1bb/0x360 lib/maple_tree.c:5546
 vma_iter_prealloc mm/internal.h:1032 [inline]
 __split_vma+0x1b7/0x830 mm/mmap.c:2344
 do_vmi_align_munmap+0x413/0x1680 mm/mmap.c:2477
 do_vmi_munmap+0x266/0x430 mm/mmap.c:2619
 __vm_munmap+0x137/0x380 mm/mmap.c:2899
 __do_sys_munmap mm/mmap.c:2916 [inline]
 __se_sys_munmap mm/mmap.c:2913 [inline]
 __x64_sys_munmap+0x62/0x80 mm/mmap.c:2913
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Last potentially related work creation:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xb9/0xd0 mm/kasan/generic.c:491
 __call_rcu_common.constprop.0+0x99/0x7e0 kernel/rcu/tree.c:2649
 ma_free_rcu lib/maple_tree.c:189 [inline]
 mas_free lib/maple_tree.c:1344 [inline]
 mas_replace+0x98c/0xfa0 lib/maple_tree.c:1785
 mas_wr_node_store+0xcab/0x1170 lib/maple_tree.c:4151
 mas_wr_modify+0x28b/0x10d0 lib/maple_tree.c:4346
 mas_wr_store_entry.isra.0+0x495/0x1030 lib/maple_tree.c:4390
 mas_store_prealloc+0xb3/0x270 lib/maple_tree.c:5529
 vma_complete+0x8fd/0xdc0 mm/mmap.c:553
 __split_vma+0x53b/0x830 mm/mmap.c:2381
 split_vma+0xc6/0x110 mm/mmap.c:2409
 mprotect_fixup+0x891/0xbd0 mm/mprotect.c:643
 do_mprotect_pkey+0x883/0xd40 mm/mprotect.c:817
 __do_sys_mprotect mm/mprotect.c:838 [inline]
 __se_sys_mprotect mm/mprotect.c:835 [inline]
 __x64_sys_mprotect+0x78/0xb0 mm/mprotect.c:835
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Second to last potentially related work creation:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xb9/0xd0 mm/kasan/generic.c:491
 __call_rcu_common.constprop.0+0x99/0x7e0 kernel/rcu/tree.c:2649
 ma_free_rcu lib/maple_tree.c:189 [inline]
 mas_free lib/maple_tree.c:1344 [inline]
 mas_replace+0x98c/0xfa0 lib/maple_tree.c:1785
 mas_wr_node_store+0xcab/0x1170 lib/maple_tree.c:4151
 mas_wr_modify+0x28b/0x10d0 lib/maple_tree.c:4346
 mas_wr_store_entry.isra.0+0x495/0x1030 lib/maple_tree.c:4390
 mas_store_gfp+0xce/0x1f0 lib/maple_tree.c:5506
 vma_iter_clear_gfp mm/mmap.c:162 [inline]
 do_vmi_align_munmap+0xd02/0x1680 mm/mmap.c:2538
 do_vmi_munmap+0x266/0x430 mm/mmap.c:2619
 __vm_munmap+0x137/0x380 mm/mmap.c:2899
 __do_sys_munmap mm/mmap.c:2916 [inline]
 __se_sys_munmap mm/mmap.c:2913 [inline]
 __x64_sys_munmap+0x62/0x80 mm/mmap.c:2913
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff8880456a1200
 which belongs to the cache maple_node of size 256
The buggy address is located 0 bytes to the right of
 allocated 256-byte region [ffff8880456a1200, ffff8880456a1300)

The buggy address belongs to the physical page:
page:ffffea000115a800 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x456a0
head:ffffea000115a800 order:1 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000010200 ffff88801324d000 ffffea0002a41980 dead000000000002
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 6468, tgid 4988 (syz-fuzzer), ts 405574023062, free_ts 405198507042
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2db/0x350 mm/page_alloc.c:1570
 prep_new_page mm/page_alloc.c:1577 [inline]
 get_page_from_freelist+0xfed/0x2d30 mm/page_alloc.c:3221
 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4477
 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2279
 alloc_slab_page mm/slub.c:1862 [inline]
 allocate_slab+0x25f/0x390 mm/slub.c:2009
 new_slab mm/slub.c:2062 [inline]
 ___slab_alloc+0xbc3/0x15d0 mm/slub.c:3215
 __kmem_cache_alloc_bulk mm/slub.c:3966 [inline]
 kmem_cache_alloc_bulk+0x270/0x860 mm/slub.c:4041
 mt_alloc_bulk lib/maple_tree.c:164 [inline]
 mas_alloc_nodes+0x341/0x8b0 lib/maple_tree.c:1304
 mas_node_count_gfp lib/maple_tree.c:1362 [inline]
 mas_preallocate+0x1bb/0x360 lib/maple_tree.c:5546
 vma_iter_prealloc mm/internal.h:1032 [inline]
 vma_merge+0x86b/0x1470 mm/mmap.c:992
 madvise_update_vma+0x243/0xd40 mm/madvise.c:153
 madvise_vma_behavior+0x806/0x21d0 mm/madvise.c:1095
 madvise_walk_vmas+0x1c7/0x2b0 mm/madvise.c:1264
 do_madvise.part.0+0x274/0x5c0 mm/madvise.c:1444
 do_madvise mm/madvise.c:1457 [inline]
 __do_sys_madvise mm/madvise.c:1457 [inline]
 __se_sys_madvise mm/madvise.c:1455 [inline]
 __x64_sys_madvise+0x117/0x150 mm/madvise.c:1455
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1161 [inline]
 free_unref_page_prepare+0x62e/0xcb0 mm/page_alloc.c:2348
 free_unref_page+0x33/0x370 mm/page_alloc.c:2443
 kasan_depopulate_vmalloc_pte+0x62/0x80 mm/kasan/shadow.c:427
 apply_to_pte_range mm/memory.c:2596 [inline]
 apply_to_pmd_range mm/memory.c:2640 [inline]
 apply_to_pud_range mm/memory.c:2676 [inline]
 apply_to_p4d_range mm/memory.c:2712 [inline]
 __apply_to_page_range+0x5d2/0xe00 mm/memory.c:2746
 kasan_release_vmalloc+0xab/0xc0 mm/kasan/shadow.c:544
 __purge_vmap_area_lazy+0x886/0x1e60 mm/vmalloc.c:1770
 drain_vmap_area_work+0x54/0xd0 mm/vmalloc.c:1804
 process_one_work+0xa34/0x16f0 kernel/workqueue.c:2597
 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2748
 kthread+0x344/0x440 kernel/kthread.c:389
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

Memory state around the buggy address:
 ffff8880456a1200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880456a1280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880456a1300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                   ^
 ffff8880456a1380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880456a1400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================