syz-executor.5: attempt to access beyond end of device
loop5: rw=2049, sector=40, nr_sectors = 4 limit=40
Buffer I/O error on dev loop5, logical block 10, lost async page write
==================================================================
BUG: KASAN: use-after-free in __lock_acquire+0x42c9/0x5e70
Read of size 8 at addr ffff88801a510888 by task syz-executor/9300

CPU: 1 PID: 9300 Comm: syz-executor Not tainted 6.1.0-next-20221213 #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+0xc0/0x100
 __lock_acquire+0x42c9/0x5e70
 lock_acquire.part.0+0x11e/0x340
 _raw_spin_lock_irq+0x36/0x50
 kmemleak_scan+0x1a0/0x1600
 kmemleak_write+0x574/0x680
 full_proxy_write+0x121/0x190
 vfs_write+0x358/0xe40
 ksys_write+0x12b/0x260
 do_syscall_64+0x3f/0x90
 entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7f8b034d35c3
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:00007ffd3b5aba28 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ffd3b5ac068 RCX: 00007f8b034d35c3
RDX: 0000000000000004 RSI: 00007f8b03589ed9 RDI: 0000000000000003
RBP: 0000000000000002 R08: 0000000000000556 R09: 00007ffd3b5c6080
R10: 00007ffd3b5c6090 R11: 0000000000000246 R12: 00000000fffffff6
R13: 00007ffd3b5acef1 R14: 0000000000000000 R15: 000000000014d8bd
 </TASK>

Allocated by task 9255:
 kasan_save_stack+0x22/0x50
 kasan_set_track+0x25/0x30
 __kasan_slab_alloc+0x5c/0x70
 kmem_cache_alloc+0x1e1/0x410
 __create_object+0x3d/0xc10
 __kmem_cache_alloc_node+0x25b/0x400
 __kmalloc_node_track_caller+0x43/0xb0
 kmemdup+0x2c/0x60
 shmem_symlink+0x184/0x690
 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 13:
 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+0x7be/0x19c0
 __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/0x9f0
 __kmem_cache_free+0x95/0x410
 shmem_free_in_core_inode+0x8f/0xb0
 i_callback+0x46/0x70
 rcu_core+0x7be/0x19c0
 __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/0x9f0
 kmem_cache_free+0xc1/0x610
 jbd2_journal_stop+0x5cc/0xeb0
 __ext4_journal_stop+0xe2/0x1f0
 ext4_dirty_inode+0xf1/0x130
 __mark_inode_dirty+0x1aa/0xe70
 touch_atime+0x648/0x700
 filemap_read+0x99d/0xb60
 generic_file_read_iter+0x35c/0x550
 ext4_file_read_iter+0x186/0x4a0
 generic_file_splice_read+0x18b/0x4d0
 do_splice_to+0x1bc/0x240
 splice_direct_to_actor+0x2b0/0x8c0
 do_splice_direct+0x1bc/0x290
 do_sendfile+0xb1d/0x1280
 __x64_sys_sendfile64+0x248/0x2a0
 do_syscall_64+0x3f/0x90
 entry_SYSCALL_64_after_hwframe+0x72/0xdc

The buggy address belongs to the object at ffff88801a510870
 which belongs to the cache kmemleak_object of size 368
The buggy address is located 24 bytes inside of
 368-byte region [ffff88801a510870, ffff88801a5109e0)

The buggy address belongs to the physical page:
page:000000001a359ac0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a510
head:000000001a359ac0 order:1 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0
flags: 0x100000000010200(slab|head|node=0|zone=1)
raw: 0100000000010200 ffff88800844f780 ffffea0000840880 dead000000000004
raw: 0000000000000000 0000000000120012 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88801a510780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88801a510800: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb
>ffff88801a510880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                      ^
 ffff88801a510900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88801a510980: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
==================================================================