BUG: KASAN: use-after-free in __list_del_entry_valid+0x2b/0x100 lib/list_debug.c:42
Read of size 8 at addr ffff8881c1896a00 by task syz-executor.3/2978

CPU: 1 PID: 2978 Comm: syz-executor.3 Not tainted 5.4.59-syzkaller-00527-g2f4d6c9fd77c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x14a/0x1ce lib/dump_stack.c:118
 print_address_description+0x93/0x620 mm/kasan/report.c:374
 __kasan_report+0x16d/0x1e0 mm/kasan/report.c:506
 kasan_report+0x36/0x60 mm/kasan/common.c:634
 __list_del_entry_valid+0x2b/0x100 lib/list_debug.c:42
 __list_del_entry include/linux/list.h:131 [inline]
 list_del_init include/linux/list.h:190 [inline]
 io_cancel_async_work+0x9b/0x280 fs/io_uring.c:3716
 io_ring_ctx_wait_and_kill+0xaf/0x1380 fs/io_uring.c:3730
 io_uring_release+0x59/0x70 fs/io_uring.c:3753
 __fput+0x27d/0x6c0 fs/file_table.c:280
 task_work_run+0x176/0x1a0 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0xc42/0x2700 kernel/exit.c:808
 do_group_exit+0x155/0x2b0 kernel/exit.c:906
 get_signal+0x13ec/0x1f00 kernel/signal.c:2743
 do_signal+0x95/0x5d0 arch/x86/kernel/signal.c:815
 exit_to_usermode_loop arch/x86/entry/common.c:159 [inline]
 prepare_exit_to_usermode+0x207/0x2e0 arch/x86/entry/common.c:194
RIP: 0033:0x45d4d9
RSP: 002b:00007f2df17a2cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 000000000118cf48 RCX: 000000000045d4d9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000118cf48
RBP: 000000000118cf40 R08: 0000000000000000 R09: 0000000000000000
R13: 00007ffc6c18a58f R14: 00007f2df17a39c0 R15: 000000000118cf4c

Allocated by task 2994:
 save_stack mm/kasan/common.c:69 [inline]
 set_track mm/kasan/common.c:77 [inline]
 __kasan_kmalloc+0x12c/0x1c0 mm/kasan/common.c:510
 io_get_req+0x1e8/0x850 fs/io_uring.c:642
 io_submit_sqe+0x83/0xe90 fs/io_uring.c:2560
 do_syscall_64+0xcb/0x150 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Freed by task 378:
 save_stack mm/kasan/common.c:69 [inline]
 set_track mm/kasan/common.c:77 [inline]
 kasan_set_free_info mm/kasan/common.c:332 [inline]
 __kasan_slab_free+0x181/0x230 mm/kasan/common.c:471
 slab_free_hook mm/slub.c:1443 [inline]
 slab_free_freelist_hook+0xd0/0x150 mm/slub.c:1476
 slab_free mm/slub.c:3041 [inline]
 kmem_cache_free+0xac/0x600 mm/slub.c:3057
 io_put_req fs/io_uring.c:762 [inline]
 io_poll_complete_work+0x737/0x940 fs/io_uring.c:1835
 process_one_work+0x777/0xf90 kernel/workqueue.c:2274
 worker_thread+0xa8f/0x1430 kernel/workqueue.c:2420
 kthread+0x2df/0x300 kernel/kthread.c:255
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352

The buggy address belongs to the object at ffff8881c1896900
 which belongs to the cache io_kiocb of size 264
The buggy address is located 256 bytes inside of
 264-byte region [ffff8881c1896900, ffff8881c1896a08)
The buggy address belongs to the page:
page:ffffea0007062580 refcount:1 mapcount:0 mapping:ffff8881daa9af00 index:0x0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 dead000000000100 dead000000000122 ffff8881daa9af00
raw: 0000000000000000 0000000080150015 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881c1896900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881c1896980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881c1896a00: fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                   ^
 ffff8881c1896a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881c1896b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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