loop1: rw=2049, sector=40, nr_sectors = 4 limit=40
Buffer I/O error on dev loop1, logical block 10, lost async page write
FAT-fs (loop5): Unrecognized mount option "vfat" or missing value
==================================================================
BUG: KASAN: use-after-free in perf_trace_lock_acquire+0x3fc/0x530
Read of size 8 at addr ffff8880167d2030 by task kmemleak/55

CPU: 0 PID: 55 Comm: kmemleak Not tainted 6.1.0-rc6-next-20221125 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x8f/0xb7
 print_report+0x175/0x478
 kasan_report+0xbf/0x1c0
 perf_trace_lock_acquire+0x3fc/0x530
 lock_acquire+0x417/0x530
 _raw_spin_lock_irq+0x36/0x50
 kmemleak_scan+0x1a0/0x1600
 kmemleak_scan_thread+0x93/0xb5
 kthread+0x2f1/0x3a0
 ret_from_fork+0x2c/0x50
 </TASK>

Allocated by task 9550:
 kasan_save_stack+0x22/0x50
 kasan_set_track+0x25/0x30
 __kasan_slab_alloc+0x5c/0x70
 kmem_cache_alloc+0x1e0/0x410
 __create_object+0x3d/0xc10
 kmem_cache_alloc_lru+0x307/0x760
 shmem_alloc_inode+0x27/0x50
 alloc_inode+0x63/0x240
 new_inode+0x25/0x1f0
 shmem_get_inode+0x191/0xdb0
 shmem_symlink+0xe5/0x690
 vfs_symlink+0x368/0x5c0
 do_symlinkat+0x133/0x280
 __x64_sys_symlink+0x79/0xa0
 do_syscall_64+0x3f/0x90
 entry_SYSCALL_64_after_hwframe+0x72/0xdc

Freed by task 127:
 kasan_save_stack+0x22/0x50
 kasan_set_track+0x25/0x30
 kasan_save_free_info+0x2e/0x50
 __kasan_slab_free+0x10a/0x190
 kmem_cache_free+0xfb/0x610
 rcu_core+0x7cf/0x2070
 __do_softirq+0x1c7/0x8f9

Last potentially related work creation:
 kasan_save_stack+0x22/0x50
 __kasan_record_aux_stack+0x95/0xb0
 __call_rcu_common.constprop.0+0x6a/0xa40
 kmem_cache_free+0xc1/0x610
 i_callback+0x46/0x70
 rcu_core+0x7cf/0x2070
 __do_softirq+0x1c7/0x8f9

Second to last potentially related work creation:
 kasan_save_stack+0x22/0x50
 __kasan_record_aux_stack+0x95/0xb0
 __call_rcu_common.constprop.0+0x6a/0xa40
 kmem_cache_free+0xc1/0x610
 security_file_free+0xae/0xe0
 __fput+0x3db/0xa40
 task_work_run+0x174/0x280
 exit_to_user_mode_prepare+0x199/0x1a0
 syscall_exit_to_user_mode+0x1d/0x50
 do_syscall_64+0x4c/0x90
 entry_SYSCALL_64_after_hwframe+0x72/0xdc

The buggy address belongs to the object at ffff8880167d2000
 which belongs to the cache kmemleak_object of size 368
The buggy address is located 48 bytes inside of
 368-byte region [ffff8880167d2000, ffff8880167d2170)

The buggy address belongs to the physical page:
page:00000000073af2f8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x167d2
head:00000000073af2f8 order:1 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0
flags: 0x100000000010200(slab|head|node=0|zone=1)
raw: 0100000000010200 ffff88800844f780 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000120012 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880167d1f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880167d1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880167d2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                     ^
 ffff8880167d2080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880167d2100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
==================================================================