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BUG: KASAN: use-after-free in radix_tree_next_slot include/linux/radix-tree.h:422 [inline]
BUG: KASAN: use-after-free in idr_for_each+0xcf/0x250 lib/idr.c:202
Read of size 8 at addr ffff8880529bc2f8 by task syz-executor.2/26758

CPU: 0 PID: 26758 Comm: syz-executor.2 Not tainted 5.11.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x125/0x19e lib/dump_stack.c:120
 print_address_description+0x5f/0x3a0 mm/kasan/report.c:230
 __kasan_report mm/kasan/report.c:397 [inline]
 kasan_report+0x15e/0x200 mm/kasan/report.c:414
 radix_tree_next_slot include/linux/radix-tree.h:422 [inline]
 idr_for_each+0xcf/0x250 lib/idr.c:202
 io_ring_ctx_wait_and_kill+0x113/0x380 fs/io_uring.c:8868
 io_uring_release+0x57/0x70 fs/io_uring.c:8895
 __fput+0x352/0x7b0 fs/file_table.c:280
 task_work_run+0x146/0x1c0 kernel/task_work.c:140
 exit_task_work include/linux/task_work.h:30 [inline]
 do_exit+0x6e4/0x2380 kernel/exit.c:825
 do_group_exit+0x168/0x2d0 kernel/exit.c:922
 get_signal+0x1734/0x1ef0 kernel/signal.c:2773
 arch_do_signal_or_restart+0x3c/0x610 arch/x86/kernel/signal.c:811
 handle_signal_work kernel/entry/common.c:147 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
 exit_to_user_mode_prepare+0xac/0x1e0 kernel/entry/common.c:208
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x48/0x180 kernel/entry/common.c:301
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x465ef9
Code: Unable to access opcode bytes at RIP 0x465ecf.
RSP: 002b:00007f9786c1d218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000056bf68 RCX: 0000000000465ef9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000056bf68
RBP: 000000000056bf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf6c
R13: 00007ffce5d7f48f R14: 00007f9786c1d300 R15: 0000000000022000

Allocated by task 26758:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:400 [inline]
 ____kasan_kmalloc+0xbd/0xf0 mm/kasan/common.c:428
 kasan_slab_alloc include/linux/kasan.h:208 [inline]
 slab_post_alloc_hook mm/slab.h:516 [inline]
 slab_alloc_node mm/slub.c:2895 [inline]
 slab_alloc mm/slub.c:2903 [inline]
 kmem_cache_alloc+0x1dd/0x2e0 mm/slub.c:2908
 radix_tree_node_alloc+0x8b/0x3b0 lib/radix-tree.c:274
 idr_get_free+0x2ca/0xb60 lib/radix-tree.c:1504
 idr_alloc_u32 lib/idr.c:46 [inline]
 idr_alloc_cyclic+0x16f/0x530 lib/idr.c:125
 io_register_personality fs/io_uring.c:9936 [inline]
 __io_uring_register fs/io_uring.c:10150 [inline]
 __do_sys_io_uring_register fs/io_uring.c:10200 [inline]
 __se_sys_io_uring_register+0xfed/0x2c30 fs/io_uring.c:10182
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Freed by task 4806:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x3d/0x70 mm/kasan/common.c:46
 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:356
 ____kasan_slab_free+0xd3/0x110 mm/kasan/common.c:361
 kasan_slab_free include/linux/kasan.h:191 [inline]
 slab_free_hook mm/slub.c:1561 [inline]
 slab_free_freelist_hook+0xdd/0x1b0 mm/slub.c:1594
 slab_free mm/slub.c:3146 [inline]
 kmem_cache_free+0x85/0x170 mm/slub.c:3162
 rcu_do_batch kernel/rcu/tree.c:2559 [inline]
 rcu_core+0x7a0/0x1220 kernel/rcu/tree.c:2794
 __do_softirq+0x318/0x714 kernel/softirq.c:345

Last potentially related work creation:
 kasan_save_stack+0x27/0x50 mm/kasan/common.c:38
 kasan_record_aux_stack+0xcc/0x100 mm/kasan/generic.c:344
 __call_rcu kernel/rcu/tree.c:3039 [inline]
 call_rcu+0x12f/0x8a0 kernel/rcu/tree.c:3114
 radix_tree_node_free lib/radix-tree.c:308 [inline]
 delete_node+0x1bf/0x7d0 lib/radix-tree.c:571
 radix_tree_delete_item+0x2e2/0x3e0 lib/radix-tree.c:1428
 io_unregister_personality+0x23/0x150 fs/io_uring.c:8813
 io_remove_personalities+0x16/0x20 fs/io_uring.c:8828
 idr_for_each+0x15d/0x250 lib/idr.c:208
 io_ring_ctx_wait_and_kill+0x113/0x380 fs/io_uring.c:8868
 io_uring_release+0x57/0x70 fs/io_uring.c:8895
 __fput+0x352/0x7b0 fs/file_table.c:280
 task_work_run+0x146/0x1c0 kernel/task_work.c:140
 exit_task_work include/linux/task_work.h:30 [inline]
 do_exit+0x6e4/0x2380 kernel/exit.c:825
 do_group_exit+0x168/0x2d0 kernel/exit.c:922
 get_signal+0x1734/0x1ef0 kernel/signal.c:2773
 arch_do_signal_or_restart+0x3c/0x610 arch/x86/kernel/signal.c:811
 handle_signal_work kernel/entry/common.c:147 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
 exit_to_user_mode_prepare+0xac/0x1e0 kernel/entry/common.c:208
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x48/0x180 kernel/entry/common.c:301
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Second to last potentially related work creation:
 kasan_save_stack+0x27/0x50 mm/kasan/common.c:38
 kasan_record_aux_stack+0xcc/0x100 mm/kasan/generic.c:344
 __call_rcu kernel/rcu/tree.c:3039 [inline]
 call_rcu+0x12f/0x8a0 kernel/rcu/tree.c:3114
 xa_node_free lib/xarray.c:258 [inline]
 xas_delete_node lib/xarray.c:494 [inline]
 update_node lib/xarray.c:756 [inline]
 xas_store+0xea6/0x1820 lib/xarray.c:841
 __xa_erase lib/xarray.c:1489 [inline]
 xa_erase+0xce/0x190 lib/xarray.c:1510
 io_uring_del_task_file fs/io_uring.c:9117 [inline]
 io_uring_remove_task_files fs/io_uring.c:9128 [inline]
 __io_uring_files_cancel+0x230/0x2c0 fs/io_uring.c:9144
 io_uring_files_cancel include/linux/io_uring.h:65 [inline]
 do_exit+0x289/0x2380 kernel/exit.c:780
 do_group_exit+0x168/0x2d0 kernel/exit.c:922
 get_signal+0x1734/0x1ef0 kernel/signal.c:2773
 arch_do_signal_or_restart+0x3c/0x610 arch/x86/kernel/signal.c:811
 handle_signal_work kernel/entry/common.c:147 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
 exit_to_user_mode_prepare+0xac/0x1e0 kernel/entry/common.c:208
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x48/0x180 kernel/entry/common.c:301
 entry_SYSCALL_64_after_hwframe+0x44/0xae

The buggy address belongs to the object at ffff8880529bc2c0
 which belongs to the cache radix_tree_node of size 576
The buggy address is located 56 bytes inside of
 576-byte region [ffff8880529bc2c0, ffff8880529bc500)
The buggy address belongs to the page:
page:00000000b7f831f3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x529bc
head:00000000b7f831f3 order:2 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head)
raw: 00fff00000010200 dead000000000100 dead000000000122 ffff88801104db40
raw: ffff8880529bc580 0000000080170015 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880529bc180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880529bc200: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff8880529bc280: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
                                                                ^
 ffff8880529bc300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880529bc380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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