ERROR: (device loop4): txCommit: 
read_mapping_page failed!
ERROR: (device loop4): txCommit: 
==================================================================
BUG: KASAN: slab-use-after-free in dtSplitPage+0x1248/0x37c0
Read of size 1 at addr ffff88811cc14aad by task syz.4.288/8909

CPU: 1 UID: 0 PID: 8909 Comm: syz.4.288 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 print_report+0xba/0x230
 kasan_report+0x117/0x150
 dtSplitPage+0x1248/0x37c0
 dtInsert+0x10a4/0x5f10
 jfs_create+0x75b/0xb10
 path_openat+0x1395/0x3860
 do_file_open+0x23e/0x4a0
 do_sys_openat2+0x113/0x200
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5322b9c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5323ae6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f5322e16090 RCX: 00007f5322b9c799
RDX: 0000000000000042 RSI: 0000200000000040 RDI: ffffffffffffff9c
RBP: 00007f5322c32c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5322e16128 R14: 00007f5322e16090 R15: 00007ffc7af38558
 </TASK>

Allocated by task 6794:
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_lru_noprof+0x2b8/0x640
 jfs_alloc_inode+0x28/0x70
 alloc_inode+0x6a/0x1b0
 new_inode+0x22/0x170
 ialloc+0x4c/0x8f0
 jfs_mkdir+0x1e1/0xb00
 vfs_mkdir+0x413/0x630
 filename_mkdirat+0x285/0x510
 __se_sys_mkdirat+0x35/0x150
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 6769:
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5c/0x80
 kmem_cache_free+0x187/0x630
 rcu_core+0x7cd/0x1070
 handle_softirqs+0x22a/0x870
 __irq_exit_rcu+0x5f/0x150
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20

Last potentially related work creation:
 kasan_save_stack+0x3e/0x60
 kasan_record_aux_stack+0xbd/0xd0
 call_rcu+0xee/0x890
 evict+0x95b/0xb10
 __dentry_kill+0x1a2/0x5e0
 finish_dput+0xc9/0x480
 ovl_free_fs+0x158/0x6c0
 generic_shutdown_super+0x13d/0x2d0
 kill_anon_super+0x3b/0x70
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x437/0x4d0
 task_work_run+0x1d9/0x270
 exit_to_user_mode_loop+0xed/0x480
 do_syscall_64+0x32d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88811cc14940
 which belongs to the cache jfs_ip of size 2216
The buggy address is located 365 bytes inside of
 freed 2216-byte region [ffff88811cc14940, ffff88811cc151e8)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88811cc136f0 pfn:0x11cc10
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88811cc17709
flags: 0x17ff00000000240(workingset|head|node=0|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 017ff00000000240 ffff888104a92dc0 ffff888104a96b88 ffffea000473f810
raw: ffff88811cc136f0 00000008000d0003 00000000f5000000 ffff88811cc17709
head: 017ff00000000240 ffff888104a92dc0 ffff888104a96b88 ffffea000473f810
head: ffff88811cc136f0 00000008000d0003 00000000f5000000 ffff88811cc17709
head: 017ff00000000003 ffffea0004730401 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Reclaimable, gfp_mask 0xd2050(__GFP_RECLAIMABLE|__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 6159, tgid 6157 (syz.1.41), ts 68139736524, free_ts 63011092747
 post_alloc_hook+0x231/0x280
 get_page_from_freelist+0x24dc/0x2580
 __alloc_frozen_pages_noprof+0x18d/0x380
 allocate_slab+0x77/0x660
 refill_objects+0x331/0x3c0
 __pcs_replace_empty_main+0x40a/0x730
 kmem_cache_alloc_lru_noprof+0x37c/0x640
 jfs_alloc_inode+0x28/0x70
 alloc_inode+0x6a/0x1b0
 iget_locked+0x131/0x6a0
 jfs_iget+0x24/0x470
 jfs_lookup+0x220/0x420
 __lookup_slow+0x2b7/0x410
 lookup_slow+0x53/0x70
 ovl_lookup_single+0x32f/0xea0
 ovl_lookup_layer+0x377/0x450
page last free pid 5256 tgid 5256 stack trace:
 __free_frozen_pages+0xc2b/0xdb0
 __slab_free+0x263/0x2b0
 qlist_free_all+0x97/0x100
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 __kmalloc_noprof+0x316/0x760
 tomoyo_realpath_from_path+0xe3/0x5d0
 tomoyo_path_perm+0x283/0x560
 security_inode_getattr+0x12b/0x310
 vfs_fstatat+0xb4/0x170
 __x64_sys_newfstatat+0x151/0x200
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88811cc14980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811cc14a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88811cc14a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                  ^
 ffff88811cc14b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811cc14b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
