R13: 0000000020ffc000 R14: 0000000020000140 R15: 0000000020ffd000
 </TASK>
loop0: detected capacity change from 0 to 264192
EXT4-fs (loop0): can't mount with data=, fs mounted w/o journal
==================================================================
BUG: KASAN: slab-use-after-free in __lock_acquire+0x334f/0x4360
Read of size 8 at addr ffff88803ea0a540 by task syz-executor.2/15555

CPU: 0 UID: 0 PID: 15555 Comm: syz-executor.2 Not tainted 6.13.0-rc3-next-20241220 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xca/0x120
 print_report+0xcb/0x620
 kasan_report+0xbd/0xf0
 __lock_acquire+0x334f/0x4360
 lock_acquire.part.0+0xeb/0x320
 _raw_spin_lock_irqsave+0x3a/0x60
 try_to_wake_up+0x9f/0x1880
 io_sq_thread_park+0xac/0xe0
 io_sq_thread_finish+0x64/0x290
 io_sq_offload_create+0x162/0x1110
 io_uring_setup+0x17da/0x32f0
 __x64_sys_io_uring_setup+0x99/0x160
 do_syscall_64+0xbf/0x1d0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc81302cb19
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:00007fc8105a2108 EFLAGS: 00000202 ORIG_RAX: 00000000000001a9
RAX: ffffffffffffffda RBX: 00007fc81313ff60 RCX: 00007fc81302cb19
RDX: 0000000020ffc000 RSI: 0000000020000000 RDI: 000000000000518b
RBP: 0000000020000000 R08: 0000000020000180 R09: 0000000020000180
R10: 0000000020000140 R11: 0000000000000202 R12: 0000000020000180
R13: 0000000020ffc000 R14: 0000000020000140 R15: 0000000020ffd000
 </TASK>

Allocated by task 15555:
 kasan_save_stack+0x24/0x50
 kasan_save_track+0x14/0x30
 __kasan_slab_alloc+0x59/0x70
 kmem_cache_alloc_node_noprof+0x14c/0x3e0
 copy_process+0x440/0x70e0
 create_io_thread+0xac/0xf0
 io_sq_offload_create+0xaf7/0x1110
 io_uring_setup+0x17da/0x32f0
 __x64_sys_io_uring_setup+0x99/0x160
 do_syscall_64+0xbf/0x1d0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 23:
 kasan_save_stack+0x24/0x50
 kasan_save_track+0x14/0x30
 kasan_save_free_info+0x3a/0x60
 __kasan_slab_free+0x38/0x50
 kmem_cache_free+0x138/0x470
 delayed_put_task_struct+0x108/0x2b0
 rcu_core+0x7c9/0x17a0
 handle_softirqs+0x1b1/0x770
 run_ksoftirqd+0x2e/0x60
 smpboot_thread_fn+0x3eb/0x930
 kthread+0x3ab/0x720
 ret_from_fork+0x48/0x80
 ret_from_fork_asm+0x1a/0x30

Last potentially related work creation:
 kasan_save_stack+0x24/0x50
 kasan_record_aux_stack+0x89/0xa0
 __call_rcu_common.constprop.0+0x6a/0xb70
 put_task_struct_rcu_user+0x75/0xc0
 __schedule+0xc53/0x3030
 schedule+0xdb/0x340
 syslog_print+0x1c2/0x590
 do_syslog.part.0+0x216/0x5c0
 do_syslog+0xcd/0x110
 kmsg_read+0x8e/0xc0
 proc_reg_read+0x120/0x310
 vfs_read+0x243/0xbd0
 ksys_read+0x122/0x240
 do_syscall_64+0xbf/0x1d0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88803ea09bc0
 which belongs to the cache task_struct of size 6848
The buggy address is located 2432 bytes inside of
 freed 6848-byte region [ffff88803ea09bc0, ffff88803ea0b680)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x3ea08
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88800d846781
flags: 0x100000000000040(head|node=0|zone=1)
page_type: f5(slab)
raw: 0100000000000040 ffff888008fee640 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000040004 00000000f5000000 ffff88800d846781
head: 0100000000000040 ffff888008fee640 dead000000000100 dead000000000122
head: 0000000000000000 0000000000040004 00000000f5000000 ffff88800d846781
head: 0100000000000003 ffffea0000fa8201 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88803ea0a400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88803ea0a480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88803ea0a500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                           ^
 ffff88803ea0a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88803ea0a600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
loop0: detected capacity change from 0 to 264192
EXT4-fs (loop0): can't mount with data=, fs mounted w/o journal
loop1: detected capacity change from 0 to 131209
ISOFS: Unable to identify CD-ROM format.