do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
==================================================================
BUG: KASAN: use-after-free in io_queue_sqe fs/io_uring.c:2523 [inline]
BUG: KASAN: use-after-free in io_queue_link_head+0x323/0x3d0 fs/io_uring.c:2538
Read of size 8 at addr ffff8881dc2fbb50 by task syz-executor.0/414

CPU: 0 PID: 414 Comm: syz-executor.0 Not tainted 5.4.242-syzkaller-00082-g487daef44f9f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
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
 io_queue_sqe fs/io_uring.c:2523 [inline]
 io_queue_link_head+0x323/0x3d0 fs/io_uring.c:2538
 io_ring_submit fs/io_uring.c:2980 [inline]
 __do_sys_io_uring_enter fs/io_uring.c:3860 [inline]
 __se_sys_io_uring_enter+0xc35/0x2030 fs/io_uring.c:3821
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

Allocated by task 414:
 save_stack mm/kasan/common.c:70 [inline]
 set_track mm/kasan/common.c:78 [inline]
 __kasan_kmalloc+0x171/0x210 mm/kasan/common.c:529
 slab_post_alloc_hook mm/slab.h:584 [inline]
 slab_alloc_node mm/slub.c:2829 [inline]
 slab_alloc mm/slub.c:2837 [inline]
 kmem_cache_alloc+0xd9/0x250 mm/slub.c:2842
 io_get_req+0x110/0x580 fs/io_uring.c:661
 io_submit_sqe+0x84/0xe90 fs/io_uring.c:2588
 io_ring_submit fs/io_uring.c:2976 [inline]
 __do_sys_io_uring_enter fs/io_uring.c:3860 [inline]
 __se_sys_io_uring_enter+0x8e8/0x2030 fs/io_uring.c:3821
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

Freed by task 414:
 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+0x1b5/0x270 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+0x10b/0x2c0 mm/slub.c:3096
 io_queue_sqe fs/io_uring.c:2522 [inline]
 io_queue_link_head+0x30d/0x3d0 fs/io_uring.c:2538
 io_ring_submit fs/io_uring.c:2980 [inline]
 __do_sys_io_uring_enter fs/io_uring.c:3860 [inline]
 __se_sys_io_uring_enter+0xc35/0x2030 fs/io_uring.c:3821
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

The buggy address belongs to the object at ffff8881dc2fbb00
 which belongs to the cache io_kiocb of size 264
The buggy address is located 80 bytes inside of
 264-byte region [ffff8881dc2fbb00, ffff8881dc2fbc08)
The buggy address belongs to the page:
page:ffffea000770be80 refcount:1 mapcount:0 mapping:ffff8881f32f5400 index:0x0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 dead000000000100 dead000000000122 ffff8881f32f5400
raw: 0000000000000000 0000000080150015 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+0x2d13/0x2d90 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
 __slab_alloc+0x62/0xa0 mm/slub.c:2707
 slab_alloc_node mm/slub.c:2792 [inline]
 slab_alloc mm/slub.c:2837 [inline]
 kmem_cache_alloc+0x109/0x250 mm/slub.c:2842
 io_get_req+0x110/0x580 fs/io_uring.c:661
 io_submit_sqe+0x84/0xe90 fs/io_uring.c:2588
 io_ring_submit fs/io_uring.c:2976 [inline]
 __do_sys_io_uring_enter fs/io_uring.c:3860 [inline]
 __se_sys_io_uring_enter+0x8e8/0x2030 fs/io_uring.c:3821
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
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_pcp_prepare mm/page_alloc.c:1233 [inline]
 free_unref_page_prepare+0x297/0x380 mm/page_alloc.c:3085
 free_unref_page mm/page_alloc.c:3134 [inline]
 free_the_page mm/page_alloc.c:4951 [inline]
 __free_pages+0xaf/0x140 mm/page_alloc.c:4959
 __vunmap+0x75b/0x890 mm/vmalloc.c:2260
 kcov_put kernel/kcov.c:396 [inline]
 kcov_close+0x27/0x50 kernel/kcov.c:495
 __fput+0x262/0x680 fs/file_table.c:281
 task_work_run+0x140/0x170 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0xcaf/0x2bc0 kernel/exit.c:859
 do_group_exit+0x138/0x300 kernel/exit.c:982
 get_signal+0xdb1/0x1440 kernel/signal.c:2735
 do_signal+0xb0/0x11f0 arch/x86/kernel/signal.c:809
 exit_to_usermode_loop+0xc0/0x1a0 arch/x86/entry/common.c:159
 prepare_exit_to_usermode+0x199/0x200 arch/x86/entry/common.c:194
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

Memory state around the buggy address:
 ffff8881dc2fba00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881dc2fba80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8881dc2fbb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                 ^
 ffff8881dc2fbb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881dc2fbc00: fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================