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BUG: KASAN: use-after-free in atomic_fetch_sub include/asm-generic/atomic-instrumented.h:199 [inline]
BUG: KASAN: use-after-free in refcount_sub_and_test include/linux/refcount.h:253 [inline]
BUG: KASAN: use-after-free in refcount_dec_and_test include/linux/refcount.h:281 [inline]
BUG: KASAN: use-after-free in io_put_req fs/io_uring.c:781 [inline]
BUG: KASAN: use-after-free in __io_queue_sqe+0x194/0xd00 fs/io_uring.c:2500
Write of size 4 at addr ffff8881ec04ae14 by task io_uring-sq/374

CPU: 0 PID: 374 Comm: io_uring-sq Not tainted 5.4.233-syzkaller-00011-g0108362f3305 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d8/0x241 lib/dump_stack.c:118
 print_address_description+0x8c/0x600 mm/kasan/report.c:384
 __kasan_report+0xf3/0x120 mm/kasan/report.c:516
 kasan_report+0x30/0x60 mm/kasan/common.c:653
 check_memory_region_inline mm/kasan/generic.c:141 [inline]
 check_memory_region+0x272/0x280 mm/kasan/generic.c:191
 atomic_fetch_sub include/asm-generic/atomic-instrumented.h:199 [inline]
 refcount_sub_and_test include/linux/refcount.h:253 [inline]
 refcount_dec_and_test include/linux/refcount.h:281 [inline]
 io_put_req fs/io_uring.c:781 [inline]
 __io_queue_sqe+0x194/0xd00 fs/io_uring.c:2500
 io_submit_sqes fs/io_uring.c:2784 [inline]
 io_sq_thread+0xe17/0x1be0 fs/io_uring.c:2910
 kthread+0x2da/0x360 kernel/kthread.c:288
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354

Allocated by task 374:
 save_stack mm/kasan/common.c:70 [inline]
 set_track mm/kasan/common.c:78 [inline]
 __kasan_kmalloc+0x130/0x1d0 mm/kasan/common.c:529
 slab_post_alloc_hook mm/slab.h:584 [inline]
 kmem_cache_alloc_bulk+0x162/0x260 mm/slub.c:3291
 io_get_req+0x181/0x5c0 fs/io_uring.c:668
 io_submit_sqe+0x84/0xe90 fs/io_uring.c:2587
 io_submit_sqes fs/io_uring.c:2784 [inline]
 io_sq_thread+0xe17/0x1be0 fs/io_uring.c:2910
 kthread+0x2da/0x360 kernel/kthread.c:288
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354

Freed by task 373:
 save_stack mm/kasan/common.c:70 [inline]
 set_track mm/kasan/common.c:78 [inline]
 kasan_set_free_info mm/kasan/common.c:345 [inline]
 __kasan_slab_free+0x178/0x230 mm/kasan/common.c:487
 slab_free_hook mm/slub.c:1455 [inline]
 slab_free_freelist_hook mm/slub.c:1494 [inline]
 slab_free mm/slub.c:3080 [inline]
 kmem_cache_free+0xd5/0x290 mm/slub.c:3096
 io_kill_timeouts fs/io_uring.c:564 [inline]
 io_ring_ctx_wait_and_kill+0x22a/0xd30 fs/io_uring.c:3768
 io_uring_release+0x57/0x70 fs/io_uring.c:3790
 __fput+0x262/0x680 fs/file_table.c:281
 task_work_run+0x140/0x170 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x18b/0x1a0 arch/x86/entry/common.c:163
 prepare_exit_to_usermode+0x199/0x200 arch/x86/entry/common.c:194
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

The buggy address belongs to the object at ffff8881ec04ad80
 which belongs to the cache io_kiocb of size 264
The buggy address is located 148 bytes inside of
 264-byte region [ffff8881ec04ad80, ffff8881ec04ae88)
The buggy address belongs to the page:
page:ffffea0007b01280 refcount:1 mapcount:0 mapping:ffff8881f0ee9b80 index:0x0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 dead000000000100 dead000000000122 ffff8881f0ee9b80
raw: 0000000000000000 0000000000150015 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC)
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook mm/page_alloc.c:2165 [inline]
 prep_new_page+0x18f/0x370 mm/page_alloc.c:2171
 get_page_from_freelist+0x2ce8/0x2d70 mm/page_alloc.c:3794
 __alloc_pages_nodemask+0x393/0x840 mm/page_alloc.c:4891
 alloc_slab_page+0x39/0x3c0 mm/slub.c:343
 allocate_slab mm/slub.c:1683 [inline]
 new_slab+0x97/0x440 mm/slub.c:1749
 new_slab_objects mm/slub.c:2505 [inline]
 ___slab_alloc+0x2fe/0x490 mm/slub.c:2667
 kmem_cache_alloc_bulk+0xb9/0x260 mm/slub.c:3265
 io_get_req+0x181/0x5c0 fs/io_uring.c:668
 io_submit_sqe+0x84/0xe90 fs/io_uring.c:2587
 io_submit_sqes fs/io_uring.c:2784 [inline]
 io_sq_thread+0xe17/0x1be0 fs/io_uring.c:2910
 kthread+0x2da/0x360 kernel/kthread.c:288
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1176 [inline]
 __free_pages_ok+0x83d/0x940 mm/page_alloc.c:1438
 free_the_page mm/page_alloc.c:4953 [inline]
 __free_pages+0x91/0x140 mm/page_alloc.c:4959
 __free_slab+0x221/0x2e0 mm/slub.c:1774
 free_slab mm/slub.c:1789 [inline]
 discard_slab mm/slub.c:1795 [inline]
 unfreeze_partials+0x14e/0x180 mm/slub.c:2288
 put_cpu_partial+0xb4/0x150 mm/slub.c:2324
 __slab_free+0x288/0x350 mm/slub.c:2971
 qlist_free_all+0x43/0xb0 mm/kasan/quarantine.c:167
 quarantine_reduce+0x174/0x190 mm/kasan/quarantine.c:260
 __kasan_kmalloc+0x43/0x1d0 mm/kasan/common.c:507
 slab_post_alloc_hook mm/slab.h:584 [inline]
 kmem_cache_alloc_bulk+0x162/0x260 mm/slub.c:3291
 io_get_req+0x181/0x5c0 fs/io_uring.c:668
 io_submit_sqe+0x84/0xe90 fs/io_uring.c:2587
 io_submit_sqes fs/io_uring.c:2784 [inline]
 io_sq_thread+0xe17/0x1be0 fs/io_uring.c:2910
 kthread+0x2da/0x360 kernel/kthread.c:288
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354

Memory state around the buggy address:
 ffff8881ec04ad00: fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881ec04ad80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881ec04ae00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                         ^
 ffff8881ec04ae80: fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881ec04af00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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