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BUG: KASAN: use-after-free in __lock_acquire+0x3e6f/0x54c0 kernel/locking/lockdep.c:4770
Read of size 8 at addr ffff88801ed524d0 by task syz-executor.0/10713

CPU: 1 PID: 10713 Comm: syz-executor.0 Not tainted 5.11.0-next-20210224-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+0xfa/0x151 lib/dump_stack.c:120
 print_address_description.constprop.0.cold+0x5b/0x2f8 mm/kasan/report.c:232
 __kasan_report mm/kasan/report.c:399 [inline]
 kasan_report.cold+0x7c/0xd8 mm/kasan/report.c:416
 __lock_acquire+0x3e6f/0x54c0 kernel/locking/lockdep.c:4770
 lock_acquire kernel/locking/lockdep.c:5510 [inline]
 lock_acquire+0x1ab/0x730 kernel/locking/lockdep.c:5475
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:159
 try_to_wake_up+0x98/0x14a0 kernel/sched/core.c:3347
 io_wqe_wake_worker+0x51f/0x6a0 fs/io-wq.c:249
 io_wqe_enqueue+0x1ff/0x3c0 fs/io-wq.c:786
 __io_queue_async_work+0x28a/0x580 fs/io_uring.c:1290
 io_queue_async_work fs/io_uring.c:1300 [inline]
 __io_queue_sqe+0x8b3/0xd60 fs/io_uring.c:6246
 __io_req_task_submit+0xfa/0x120 fs/io_uring.c:2026
 __tctx_task_work fs/io_uring.c:1882 [inline]
 tctx_task_work+0x12b/0x330 fs/io_uring.c:1908
 task_work_run+0xdd/0x1a0 kernel/task_work.c:140
 tracehook_notify_signal include/linux/tracehook.h:212 [inline]
 handle_signal_work kernel/entry/common.c:145 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
 exit_to_user_mode_prepare+0x221/0x250 kernel/entry/common.c:208
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:301
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x465ef9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f22ad0be188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 0000000000001000 RBX: 000000000056bf60 RCX: 0000000000465ef9
RDX: 0000000000000000 RSI: 000000000000450c RDI: 0000000000000005
RBP: 00000000004bcd1c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007fffa04fd0af R14: 00007f22ad0be300 R15: 0000000000022000

Allocated by task 10713:
 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:427 [inline]
 __kasan_slab_alloc+0x75/0x90 mm/kasan/common.c:460
 kasan_slab_alloc include/linux/kasan.h:223 [inline]
 slab_post_alloc_hook mm/slab.h:516 [inline]
 slab_alloc_node mm/slub.c:2907 [inline]
 kmem_cache_alloc_node+0x16d/0x3c0 mm/slub.c:2943
 alloc_task_struct_node kernel/fork.c:170 [inline]
 dup_task_struct kernel/fork.c:860 [inline]
 copy_process+0x613/0x6fd0 kernel/fork.c:1940
 kernel_clone+0xe7/0xab0 kernel/fork.c:2462
 io_wq_fork_thread+0xa7/0xe0 fs/io-wq.c:601
 io_wq_create+0x81c/0xab0 fs/io-wq.c:985
 io_init_wq_offload fs/io_uring.c:7779 [inline]
 io_uring_alloc_task_context+0x185/0x510 fs/io_uring.c:7798
 io_uring_add_task_file+0x261/0x350 fs/io_uring.c:8737
 __do_sys_io_uring_enter+0x111c/0x1f50 fs/io_uring.c:9129
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Freed by task 12:
 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:357
 ____kasan_slab_free mm/kasan/common.c:360 [inline]
 ____kasan_slab_free mm/kasan/common.c:325 [inline]
 __kasan_slab_free+0xf5/0x130 mm/kasan/common.c:367
 kasan_slab_free include/linux/kasan.h:199 [inline]
 slab_free_hook mm/slub.c:1562 [inline]
 slab_free_freelist_hook+0x72/0x1b0 mm/slub.c:1600
 slab_free mm/slub.c:3161 [inline]
 kmem_cache_free+0x8b/0x730 mm/slub.c:3177
 __put_task_struct+0x267/0x3f0 kernel/fork.c:742
 put_task_struct include/linux/sched/task.h:111 [inline]
 delayed_put_task_struct+0x1f6/0x340 kernel/exit.c:173
 rcu_do_batch kernel/rcu/tree.c:2559 [inline]
 rcu_core+0x722/0x1280 kernel/rcu/tree.c:2794
 __do_softirq+0x29b/0x9f6 kernel/softirq.c:345

Last potentially related work creation:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_record_aux_stack+0xe5/0x110 mm/kasan/generic.c:345
 __call_rcu kernel/rcu/tree.c:3039 [inline]
 call_rcu+0xb1/0x700 kernel/rcu/tree.c:3114
 put_task_struct_rcu_user+0x7f/0xb0 kernel/exit.c:179
 context_switch kernel/sched/core.c:4327 [inline]
 __schedule+0x914/0x21a0 kernel/sched/core.c:5075
 schedule+0xcf/0x270 kernel/sched/core.c:5154
 schedule_timeout+0x14a/0x250 kernel/time/timer.c:1892
 io_wqe_worker fs/io-wq.c:485 [inline]
 task_thread.isra.0+0x920/0x1480 fs/io-wq.c:575
 task_thread_bound+0x18/0x20 fs/io-wq.c:581
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

Second to last potentially related work creation:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_record_aux_stack+0xe5/0x110 mm/kasan/generic.c:345
 __call_rcu kernel/rcu/tree.c:3039 [inline]
 call_rcu+0xb1/0x700 kernel/rcu/tree.c:3114
 put_task_struct_rcu_user+0x7f/0xb0 kernel/exit.c:179
 context_switch kernel/sched/core.c:4327 [inline]
 __schedule+0x914/0x21a0 kernel/sched/core.c:5075
 schedule+0xcf/0x270 kernel/sched/core.c:5154
 freezable_schedule include/linux/freezer.h:172 [inline]
 futex_wait_queue_me+0x2a7/0x570 kernel/futex.c:2606
 futex_wait+0x1db/0x580 kernel/futex.c:2708
 do_futex+0x15d/0x1710 kernel/futex.c:3735
 __do_sys_futex+0x2a2/0x470 kernel/futex.c:3798
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

The buggy address belongs to the object at ffff88801ed51c00
 which belongs to the cache task_struct of size 6912
The buggy address is located 2256 bytes inside of
 6912-byte region [ffff88801ed51c00, ffff88801ed53700)
The buggy address belongs to the page:
page:00000000ecbc9e7a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ed50
head:00000000ecbc9e7a order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head)
raw: 00fff00000010200 0000000000000000 0000000100000001 ffff888140004000
raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88801ed52380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88801ed52400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88801ed52480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                 ^
 ffff88801ed52500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88801ed52580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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