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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+0x206/0x220 lib/idr.c:202
Read of size 8 at addr ffff8880372795b8 by task syz-executor.2/23296

CPU: 1 PID: 23296 Comm: syz-executor.2 Not tainted 5.11.0-rc6-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+0x107/0x163 lib/dump_stack.c:120
 print_address_description.constprop.0.cold+0x5b/0x2c6 mm/kasan/report.c:230
 __kasan_report mm/kasan/report.c:396 [inline]
 kasan_report.cold+0x79/0xd5 mm/kasan/report.c:413
 radix_tree_next_slot include/linux/radix-tree.h:422 [inline]
 idr_for_each+0x206/0x220 lib/idr.c:202
 io_ring_ctx_wait_and_kill+0x1bd/0x600 fs/io_uring.c:8795
 io_uring_release+0x3e/0x50 fs/io_uring.c:8820
 __fput+0x283/0x920 fs/file_table.c:280
 task_work_run+0xdd/0x190 kernel/task_work.c:140
 exit_task_work include/linux/task_work.h:30 [inline]
 do_exit+0xc5c/0x2ae0 kernel/exit.c:825
 do_group_exit+0x125/0x310 kernel/exit.c:922
 get_signal+0x427/0x20f0 kernel/signal.c:2773
 arch_do_signal_or_restart+0x2a8/0x1eb0 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+0x148/0x250 kernel/entry/common.c:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x465b09
Code: Unable to access opcode bytes at RIP 0x465adf.
RSP: 002b:00007fb604c50218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000056bf68 RCX: 0000000000465b09
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000056bf68
RBP: 000000000056bf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf6c
R13: 00007ffcd036486f R14: 00007fb604c50300 R15: 0000000000022000

Allocated by task 23296:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:401 [inline]
 ____kasan_kmalloc.constprop.0+0x7f/0xa0 mm/kasan/common.c:429
 kasan_slab_alloc include/linux/kasan.h:209 [inline]
 slab_post_alloc_hook mm/slab.h:512 [inline]
 slab_alloc mm/slab.c:3315 [inline]
 kmem_cache_alloc+0x1ab/0x4c0 mm/slab.c:3486
 radix_tree_node_alloc.constprop.0+0x7c/0x350 lib/radix-tree.c:274
 idr_get_free+0x554/0xa60 lib/radix-tree.c:1504
 idr_alloc_u32+0x170/0x2d0 lib/idr.c:46
 idr_alloc_cyclic+0x102/0x230 lib/idr.c:125
 io_register_personality fs/io_uring.c:9873 [inline]
 __io_uring_register fs/io_uring.c:10102 [inline]
 __do_sys_io_uring_register+0x162f/0x4080 fs/io_uring.c:10152
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Freed by task 18:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_set_track+0x1c/0x30 mm/kasan/common.c:46
 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:356
 ____kasan_slab_free+0xb0/0xe0 mm/kasan/common.c:362
 kasan_slab_free include/linux/kasan.h:192 [inline]
 __cache_free mm/slab.c:3424 [inline]
 kmem_cache_free+0x58/0x1c0 mm/slab.c:3697
 rcu_do_batch kernel/rcu/tree.c:2489 [inline]
 rcu_core+0x5eb/0xf00 kernel/rcu/tree.c:2723
 __do_softirq+0x29b/0x9f6 kernel/softirq.c:343

Last potentially related work creation:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_record_aux_stack+0x87/0xb0 mm/kasan/generic.c:344
 __call_rcu kernel/rcu/tree.c:2965 [inline]
 call_rcu+0xbb/0x700 kernel/rcu/tree.c:3038
 radix_tree_node_free lib/radix-tree.c:308 [inline]
 delete_node+0x591/0x8c0 lib/radix-tree.c:571
 __radix_tree_delete+0x190/0x370 lib/radix-tree.c:1377
 radix_tree_delete_item+0xe7/0x230 lib/radix-tree.c:1428
 io_remove_personalities+0x1d/0x170 fs/io_uring.c:8740
 idr_for_each+0x113/0x220 lib/idr.c:208
 io_ring_ctx_wait_and_kill+0x1bd/0x600 fs/io_uring.c:8795
 io_uring_release+0x3e/0x50 fs/io_uring.c:8820
 __fput+0x283/0x920 fs/file_table.c:280
 task_work_run+0xdd/0x190 kernel/task_work.c:140
 exit_task_work include/linux/task_work.h:30 [inline]
 do_exit+0xc5c/0x2ae0 kernel/exit.c:825
 do_group_exit+0x125/0x310 kernel/exit.c:922
 get_signal+0x427/0x20f0 kernel/signal.c:2773
 arch_do_signal_or_restart+0x2a8/0x1eb0 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+0x148/0x250 kernel/entry/common.c:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Second to last potentially related work creation:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_record_aux_stack+0x87/0xb0 mm/kasan/generic.c:344
 __call_rcu kernel/rcu/tree.c:2965 [inline]
 call_rcu+0xbb/0x700 kernel/rcu/tree.c:3038
 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+0xbcc/0x1bb0 lib/xarray.c:841
 __xa_erase lib/xarray.c:1489 [inline]
 xa_erase+0xb0/0x170 lib/xarray.c:1510
 io_uring_del_task_file fs/io_uring.c:9044 [inline]
 io_uring_remove_task_files+0xc8/0x1a0 fs/io_uring.c:9055
 __io_uring_files_cancel+0x15a/0x1b0 fs/io_uring.c:9071
 io_uring_files_cancel include/linux/io_uring.h:51 [inline]
 do_exit+0x2fe/0x2ae0 kernel/exit.c:780
 do_group_exit+0x125/0x310 kernel/exit.c:922
 get_signal+0x427/0x20f0 kernel/signal.c:2773
 arch_do_signal_or_restart+0x2a8/0x1eb0 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+0x148/0x250 kernel/entry/common.c:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

The buggy address belongs to the object at ffff888037279580
 which belongs to the cache radix_tree_node of size 576
The buggy address is located 56 bytes inside of
 576-byte region [ffff888037279580, ffff8880372797c0)
The buggy address belongs to the page:
page:00000000413f87f3 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888037279ffb pfn:0x37279
flags: 0xfff00000000200(slab)
raw: 00fff00000000200 ffffea00018b4348 ffffea000159c5c8 ffff888010c6f000
raw: ffff888037279ffb ffff888037279000 0000000100000005 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888037279480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888037279500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888037279580: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                        ^
 ffff888037279600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888037279680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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