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BUG: KASAN: slab-use-after-free in ma_dead_node lib/maple_tree.c:575 [inline]
BUG: KASAN: slab-use-after-free in mas_rewalk_if_dead lib/maple_tree.c:4415 [inline]
BUG: KASAN: slab-use-after-free in mas_next_slot+0x18b/0xb00 lib/maple_tree.c:4697
Read of size 8 at addr ffff888104b28a00 by task syz.2.46/4876

CPU: 0 UID: 0 PID: 4876 Comm: syz.2.46 Not tainted 6.16.0-rc5-syzkaller #0 PREEMPT(none) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x18a/0x250 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xca/0x230 mm/kasan/report.c:480
 kasan_report+0x118/0x150 mm/kasan/report.c:593
 ma_dead_node lib/maple_tree.c:575 [inline]
 mas_rewalk_if_dead lib/maple_tree.c:4415 [inline]
 mas_next_slot+0x18b/0xb00 lib/maple_tree.c:4697
 mas_find+0x9cc/0xc00 lib/maple_tree.c:6062
 vma_find include/linux/mm.h:855 [inline]
 remap_move mm/mremap.c:1819 [inline]
 do_mremap mm/mremap.c:1904 [inline]
 __do_sys_mremap mm/mremap.c:1968 [inline]
 __se_sys_mremap+0xb09/0xd70 mm/mremap.c:1936
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x8f/0x250 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2fbc2fe929
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:00007f2fbbd6f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000019
RAX: ffffffffffffffda RBX: 00007f2fbc525fa0 RCX: 00007f2fbc2fe929
RDX: 0000000000600002 RSI: 0000000000600002 RDI: 0000200000000000
RBP: 00007f2fbc380b39 R08: 0000200000a00000 R09: 0000000000000000
R10: 0000000000000007 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f2fbc525fa0 R15: 00007ffd237a5788
 </TASK>

Allocated by task 4876:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:319 [inline]
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4149 [inline]
 kmem_cache_alloc_bulk_noprof+0x40d/0x640 mm/slub.c:5375
 mt_alloc_bulk lib/maple_tree.c:181 [inline]
 mas_alloc_nodes+0x3ed/0x870 lib/maple_tree.c:1277
 mas_node_count_gfp lib/maple_tree.c:1337 [inline]
 mas_preallocate+0x809/0xd30 lib/maple_tree.c:5537
 vma_iter_prealloc mm/vma.h:463 [inline]
 __split_vma+0x290/0xa20 mm/vma.c:528
 vms_gather_munmap_vmas+0x2de/0x1030 mm/vma.c:1359
 __mmap_prepare mm/vma.c:2361 [inline]
 __mmap_region mm/vma.c:2653 [inline]
 mmap_region+0x715/0x1f70 mm/vma.c:2741
 do_mmap+0xc30/0x10b0 mm/mmap.c:561
 vm_mmap_pgoff+0x200/0x3e0 mm/util.c:579
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x8f/0x250 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 1330:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x62/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2382 [inline]
 slab_free mm/slub.c:4644 [inline]
 kmem_cache_free+0x175/0x460 mm/slub.c:4746
 rcu_do_batch kernel/rcu/tree.c:2576 [inline]
 rcu_core+0xbee/0x1530 kernel/rcu/tree.c:2832
 handle_softirqs+0x19a/0x500 kernel/softirq.c:579
 do_softirq+0xde/0x170 kernel/softirq.c:480
 __local_bh_enable_ip+0x6b/0x70 kernel/softirq.c:407
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 cfg80211_inform_single_bss_data+0xf62/0x18a0 net/wireless/scan.c:2383
 cfg80211_inform_bss_data+0x1f0/0x3690 net/wireless/scan.c:3222
 cfg80211_inform_bss_frame_data+0x3d5/0x680 net/wireless/scan.c:3313
 ieee80211_bss_info_update+0x578/0x7b0 net/mac80211/scan.c:226
 ieee80211_rx_bss_info net/mac80211/ibss.c:1094 [inline]
 ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1573 [inline]
 ieee80211_ibss_rx_queued_mgmt+0x92d/0x2710 net/mac80211/ibss.c:1600
 ieee80211_iface_process_skb net/mac80211/iface.c:1668 [inline]
 ieee80211_iface_work+0x7c3/0xf20 net/mac80211/iface.c:1722
 cfg80211_wiphy_work+0x2e9/0x530 net/wireless/core.c:435
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xa3d/0x1530 kernel/workqueue.c:3321
 worker_thread+0xa03/0xeb0 kernel/workqueue.c:3402
 kthread+0x66a/0x760 kernel/kthread.c:464
 ret_from_fork+0x1b7/0x380 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Last potentially related work creation:
 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:47
 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:548
 __call_rcu_common kernel/rcu/tree.c:3094 [inline]
 call_rcu+0x14a/0x790 kernel/rcu/tree.c:3214
 mas_wr_node_store lib/maple_tree.c:3893 [inline]
 mas_wr_store_entry+0x19c1/0x2960 lib/maple_tree.c:4104
 mas_store_prealloc+0xc77/0x1330 lib/maple_tree.c:5510
 vma_iter_store_new mm/vma.h:509 [inline]
 vma_complete+0x419/0xbc0 mm/vma.c:354
 __split_vma+0x8df/0xa20 mm/vma.c:568
 vms_gather_munmap_vmas+0x2de/0x1030 mm/vma.c:1359
 do_vmi_align_munmap+0x246/0x390 mm/vma.c:1527
 do_vmi_munmap+0x253/0x2e0 mm/vma.c:1584
 do_munmap+0xe1/0x140 mm/mmap.c:1071
 mremap_to+0x304/0x7b0 mm/mremap.c:1367
 remap_move mm/mremap.c:1861 [inline]
 do_mremap mm/mremap.c:1904 [inline]
 __do_sys_mremap mm/mremap.c:1968 [inline]
 __se_sys_mremap+0xa85/0xd70 mm/mremap.c:1936
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x8f/0x250 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff888104b28a00
 which belongs to the cache maple_node of size 256
The buggy address is located 0 bytes inside of
 freed 256-byte region [ffff888104b28a00, ffff888104b28b00)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x104b28
head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x200000000000040(head|node=0|zone=2)
page_type: f5(slab)
raw: 0200000000000040 ffff888100091000 ffffea00045e3580 dead000000000002
raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000
head: 0200000000000040 ffff888100091000 ffffea00045e3580 dead000000000002
head: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000
head: 0200000000000001 ffffea000412ca01 00000000ffffffff 00000000ffffffff
head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000002
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0x52800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP), pid 26, tgid 26 (kdevtmpfs), ts 7639518065, free_ts 0
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x168/0x1a0 mm/page_alloc.c:1851
 prep_new_page mm/page_alloc.c:1859 [inline]
 get_page_from_freelist+0x295c/0x2aa0 mm/page_alloc.c:3858
 __alloc_frozen_pages_noprof+0x26b/0x460 mm/page_alloc.c:5148
 alloc_pages_mpol+0xd1/0x330 mm/mempolicy.c:2416
 alloc_slab_page mm/slub.c:2452 [inline]
 allocate_slab+0x8a/0x350 mm/slub.c:2620
 new_slab mm/slub.c:2674 [inline]
 ___slab_alloc+0x9dc/0x10e0 mm/slub.c:3860
 __kmem_cache_alloc_bulk mm/slub.c:5295 [inline]
 kmem_cache_alloc_bulk_noprof+0x1c7/0x640 mm/slub.c:5367
 mt_alloc_bulk lib/maple_tree.c:181 [inline]
 mas_alloc_nodes+0x3ed/0x870 lib/maple_tree.c:1277
 mas_insert+0x38c/0x7c0 lib/maple_tree.c:4325
 mas_alloc_cyclic+0x20e/0x630 lib/maple_tree.c:4388
 mtree_alloc_cyclic+0x196/0x220 lib/maple_tree.c:6527
 simple_offset_add+0xdc/0x190 fs/libfs.c:300
 shmem_mknod+0xfa/0x1d0 mm/shmem.c:3871
 vfs_mknod+0x37c/0x3c0 fs/namei.c:4244
 handle_create drivers/base/devtmpfs.c:233 [inline]
 handle drivers/base/devtmpfs.c:389 [inline]
 devtmpfs_work_loop+0x98b/0xcf0 drivers/base/devtmpfs.c:404
 devtmpfsd+0x4d/0x50 drivers/base/devtmpfs.c:446
page_owner free stack trace missing

Memory state around the buggy address:
 ffff888104b28900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888104b28980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888104b28a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff888104b28a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888104b28b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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