io_mem_free.part.0+0xb0/0xb9 fs/io_uring.c:8797
 io_mem_free fs/io_uring.c:8792 [inline]
 io_ring_ctx_free fs/io_uring.c:9339 [inline]
 io_ring_exit_work+0xa64/0xbe8 fs/io_uring.c:9491
 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
 kthread+0x405/0x4f0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
------------[ cut here ]------------
kernel BUG at mm/page_alloc.c:1071!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 44 Comm: kworker/u4:2 Not tainted 5.16.0-rc1-next-20211118-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound call_usermodehelper_exec_work
RIP: 0010:__free_one_page+0xa10/0xe30 mm/page_alloc.c:1071
Code: 43 34 85 c0 0f 84 79 f9 ff ff 48 c7 c6 40 5d b7 89 48 89 ef e8 a1 e3 f6 ff 0f 0b 48 c7 c6 20 5c b7 89 4c 89 ef e8 90 e3 f6 ff <0f> 0b 0f 0b 48 c7 c6 80 5c b7 89 4c 89 ef e8 7d e3 f6 ff 0f 0b 48
RSP: 0000:ffffc9000114f528 EFLAGS: 00010093
RAX: 0000000000000000 RBX: ffffc9000114f620 RCX: 0000000000000000
RDX: ffff8880119ed7c0 RSI: ffffffff81b3f6f0 RDI: 0000000000000003
RBP: 0000000000156a00 R08: 0000000000000018 R09: 00000000ffffffff
R10: ffffffff88ffe2eb R11: 00000000ffffffff R12: 0000000000000009
R13: ffffea00055a8000 R14: 0000000000000000 R15: ffff88823fff7e00
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3ba8d12b11 CR3: 0000000067632000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 free_pcppages_bulk+0x533/0x8a0 mm/page_alloc.c:1531
 free_unref_page_commit.constprop.0+0x4cf/0x6f0 mm/page_alloc.c:3375
 free_unref_page+0x236/0x690 mm/page_alloc.c:3408
 __unfreeze_partials+0x343/0x360 mm/slub.c:2527
 qlink_free mm/kasan/quarantine.c:146 [inline]
 qlist_free_all+0x5a/0xc0 mm/kasan/quarantine.c:165
 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:272
 __kasan_slab_alloc+0xa2/0xc0 mm/kasan/common.c:444
 kasan_slab_alloc include/linux/kasan.h:259 [inline]
 slab_post_alloc_hook mm/slab.h:519 [inline]
 slab_alloc_node mm/slub.c:3234 [inline]
 slab_alloc mm/slub.c:3242 [inline]
 kmem_cache_alloc+0x202/0x3a0 mm/slub.c:3247
 copy_fs_struct+0x45/0x340 fs/fs_struct.c:114
 copy_fs kernel/fork.c:1577 [inline]
 copy_process+0x525a/0x75a0 kernel/fork.c:2233
 kernel_clone+0xe7/0xab0 kernel/fork.c:2633
 kernel_thread+0xb5/0xf0 kernel/fork.c:2685
 call_usermodehelper_exec_work kernel/umh.c:174 [inline]
 call_usermodehelper_exec_work+0xcc/0x180 kernel/umh.c:160
 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
 kthread+0x405/0x4f0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Modules linked in:
---[ end trace 2b3d202e7aebda19 ]---
RIP: 0010:__free_one_page+0xa10/0xe30 mm/page_alloc.c:1071
Code: 43 34 85 c0 0f 84 79 f9 ff ff 48 c7 c6 40 5d b7 89 48 89 ef e8 a1 e3 f6 ff 0f 0b 48 c7 c6 20 5c b7 89 4c 89 ef e8 90 e3 f6 ff <0f> 0b 0f 0b 48 c7 c6 80 5c b7 89 4c 89 ef e8 7d e3 f6 ff 0f 0b 48
RSP: 0000:ffffc9000114f528 EFLAGS: 00010093
RAX: 0000000000000000 RBX: ffffc9000114f620 RCX: 0000000000000000
RDX: ffff8880119ed7c0 RSI: ffffffff81b3f6f0 RDI: 0000000000000003
RBP: 0000000000156a00 R08: 0000000000000018 R09: 00000000ffffffff
R10: ffffffff88ffe2eb R11: 00000000ffffffff R12: 0000000000000009
R13: ffffea00055a8000 R14: 0000000000000000 R15: ffff88823fff7e00
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3ba8d12b11 CR3: 0000000067632000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400