ERROR: (device loop3): txCommit: 
read_mapping_page failed!
ERROR: (device loop3): txCommit: 
==================================================================
BUG: KASAN: slab-out-of-bounds in dtSplitPage+0x1248/0x37c0
Read of size 1 at addr ffff88801fe448cd by task syz.3.133/6492

CPU: 0 UID: 0 PID: 6492 Comm: syz.3.133 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+0x107a/0x5de0
 jfs_mknod+0x6bd/0x9d0
 vfs_mknod+0x447/0x610
 filename_mknodat+0x3cb/0x660
 __se_sys_mknod+0x3a/0x150
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff39e59acb9
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:00007ff39f4db028 EFLAGS: 00000246 ORIG_RAX: 0000000000000085
RAX: ffffffffffffffda RBX: 00007ff39e815fa0 RCX: 00007ff39e59acb9
RDX: 0000000000000000 RSI: 0000000000001000 RDI: 0000200000000080
RBP: 00007ff39e608bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff39e816038 R14: 00007ff39e815fa0 R15: 00007ffc44a10b58
 </TASK>

Allocated by task 6492:
 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
 iget_locked+0x131/0x6a0
 jfs_iget+0x24/0x470
 jfs_lookup+0x220/0x420
 __lookup_slow+0x2b7/0x410
 lookup_slow+0x53/0x70
 path_lookupat+0x3f5/0x8c0
 filename_lookup+0x256/0x5d0
 __se_sys_chdir+0xa8/0x2a0
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88801fe44018
 which belongs to the cache jfs_ip of size 2216
The buggy address is located 13 bytes to the right of
 allocated 2216-byte region [ffff88801fe44018, ffff88801fe448c0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1fe40
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88801fe47709
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff8881042c3000 dead000000000100 dead000000000122
raw: 0000000000000000 00000008000d000d 00000000f5000000 ffff88801fe47709
head: 00fff00000000040 ffff8881042c3000 dead000000000100 dead000000000122
head: 0000000000000000 00000008000d000d 00000000f5000000 ffff88801fe47709
head: 00fff00000000003 ffffea00007f9001 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 6302, tgid 6301 (syz.0.83), ts 78241897582, free_ts 0
 post_alloc_hook+0x231/0x280
 get_page_from_freelist+0x24dc/0x2580
 __alloc_frozen_pages_noprof+0x18d/0x380
 allocate_slab+0x7b/0x660
 refill_objects+0x331/0x3c0
 refill_sheaf+0x29/0x50
 __pcs_replace_empty_main+0x3ef/0x620
 kmem_cache_alloc_lru_noprof+0x37c/0x640
 jfs_alloc_inode+0x28/0x70
 alloc_inode+0x6a/0x1b0
 new_inode+0x22/0x170
 jfs_fill_super+0x569/0xd80
 get_tree_bdev_flags+0x431/0x4f0
 vfs_get_tree+0x92/0x2a0
 do_new_mount+0x341/0xd30
 __se_sys_mount+0x31d/0x420
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88801fe44780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88801fe44800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88801fe44880: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
                                              ^
 ffff88801fe44900: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
 ffff88801fe44980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
