EXT4-fs error (device loop5): __ext4_fill_super:5244: inode #2: comm syz-executor.5: iget: root inode unallocated
EXT4-fs (loop5): get root inode failed
EXT4-fs (loop5): mount failed
==================================================================
BUG: KASAN: use-after-free in __lock_acquire+0x42c9/0x5e70
Read of size 8 at addr ffff88804518f0f8 by task syz-executor/9351

CPU: 1 PID: 9351 Comm: syz-executor Not tainted 6.0.0-rc2-next-20220824 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x8b/0xb3
 print_report.cold+0x5e/0x5e5
 kasan_report+0xb1/0x1c0
 __lock_acquire+0x42c9/0x5e70
 lock_acquire+0x1a2/0x530
 _raw_spin_lock_irq+0x32/0x50
 kmemleak_scan+0x21d/0x16f0
 kmemleak_write+0x570/0x680
 full_proxy_write+0x11d/0x190
 vfs_write+0x2cb/0xd90
 ksys_write+0x127/0x250
 do_syscall_64+0x3b/0x90
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f49b35cb5c3
Code: 16 00 00 00 eb ae 90 b8 6e 00 00 00 eb a6 e8 44 ef 04 00 0f 1f 40 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 55 c3 0f 1f 40 00 48 83 ec 28 48 89 54 24 18
RSP: 002b:00007fff56edf358 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fff56edf998 RCX: 00007f49b35cb5c3
RDX: 0000000000000004 RSI: 00007f49b3681ed9 RDI: 0000000000000003
RBP: 0000000000000002 R08: 0000000000000534 R09: 00007fff56fc7080
R10: 00007fff56fc7090 R11: 0000000000000246 R12: 00000000fffffff6
R13: 00007fff56edfef1 R14: 0000000000000000 R15: 000000000014549a
 </TASK>

Allocated by task 127:
 kasan_save_stack+0x1e/0x40
 __kasan_slab_alloc+0x66/0x80
 kmem_cache_alloc+0x1b1/0x3e0
 __create_object.isra.0+0x3d/0xc10
 __kmem_cache_alloc_node+0x224/0x3c0
 __kmalloc_node+0x3c/0xb0
 memcg_alloc_slab_cgroups+0x7a/0x130
 allocate_slab+0xd6/0x320
 ___slab_alloc+0x8a3/0xe50
 __slab_alloc.constprop.0+0x45/0x90
 kmem_cache_alloc+0x2f1/0x3e0
 __alloc_file+0x21/0x240
 alloc_empty_file+0x6d/0x170
 path_openat+0xd4/0x2800
 do_filp_open+0x1b6/0x410
 do_sys_openat2+0x171/0x4c0
 __x64_sys_openat+0x13f/0x1f0
 do_syscall_64+0x3b/0x90
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Freed by task 127:
 kasan_save_stack+0x1e/0x40
 kasan_set_track+0x21/0x30
 kasan_set_free_info+0x20/0x40
 __kasan_slab_free+0x108/0x190
 kmem_cache_free+0xf7/0x610
 rcu_core+0x7e2/0x2080
 __do_softirq+0x1c8/0x8d0

Last potentially related work creation:
 kasan_save_stack+0x1e/0x40
 __kasan_record_aux_stack+0x97/0xb0
 call_rcu+0x6a/0xa30
 __kmem_cache_free+0x91/0x400
 __free_slab+0xad/0x1f0
 __unfreeze_partials+0x130/0x150
 qlist_free_all+0x6d/0x1a0
 kasan_quarantine_reduce+0x184/0x210
 __kasan_slab_alloc+0x7c/0x80
 kmem_cache_alloc+0x1b1/0x3e0
 flock_lock_inode+0x16f/0x11f0
 flock_lock_inode_wait+0xf9/0x240
 __do_sys_flock+0x49e/0x510
 do_syscall_64+0x3b/0x90
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Second to last potentially related work creation:
 kasan_save_stack+0x1e/0x40
 __kasan_record_aux_stack+0x97/0xb0
 call_rcu+0x6a/0xa30
 kmem_cache_free+0xbd/0x610
 mempool_free+0xe5/0x3b0
 bio_put+0x254/0x400
 bio_endio+0x58e/0x710
 blk_update_request+0x394/0x1180
 scsi_end_request+0x7a/0x9a0
 scsi_io_completion+0xbc/0x2070
 scsi_complete+0x114/0x560
 blk_complete_reqs+0xb2/0xf0
 __do_softirq+0x1c8/0x8d0

The buggy address belongs to the object at ffff88804518f0e0
 which belongs to the cache kmemleak_object of size 368
The buggy address is located 24 bytes inside of
 368-byte region [ffff88804518f0e0, ffff88804518f250)

The buggy address belongs to the physical page:
page:000000003979179b refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88804518e870 pfn:0x4518e
head:000000003979179b order:1 compound_mapcount:0 compound_pincount:0
flags: 0x100000000010200(slab|head|node=0|zone=1)
raw: 0100000000010200 ffffea0000364c88 ffffea00006aaa08 ffff888007c4f780
raw: ffff88804518e870 000000000012000c 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88804518ef80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88804518f000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88804518f080: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb
                                                                ^
 ffff88804518f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88804518f180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================