ERROR: (device loop3): txCommit: 
read_mapping_page failed!
ERROR: (device loop3): txCommit: 
==================================================================
BUG: KASAN: slab-out-of-bounds in dtSplitPage+0x12c6/0x3b20
Read of size 1 at addr ffff888112fe367d by task syz.3.223/6618

CPU: 1 UID: 0 PID: 6618 Comm: syz.3.223 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+0x189/0x250
 print_report+0xca/0x240
 kasan_report+0x118/0x150
 dtSplitPage+0x12c6/0x3b20
 dtInsert+0x109b/0x5f40
 jfs_create+0x6c8/0xa80
 path_openat+0x14f4/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_open+0x11e/0x150
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc5caf8ec29
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc5cbe82038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fc5cb1d5fa0 RCX: 00007fc5caf8ec29
RDX: 000000000000009c RSI: 00000000001e3042 RDI: 0000200000000140
RBP: 00007fc5cb011e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc5cb1d6038 R14: 00007fc5cb1d5fa0 R15: 00007ffd5a8e55d8
 </TASK>

Allocated by task 6618:
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_lru_noprof+0x1c6/0x3d0
 jfs_alloc_inode+0x28/0x70
 alloc_inode+0x6a/0x1b0
 iget_locked+0x106/0x580
 jfs_iget+0x24/0x3e0
 jfs_lookup+0x1c5/0x380
 __lookup_slow+0x297/0x3d0
 lookup_slow+0x53/0x70
 walk_component+0x2d2/0x400
 path_lookupat+0x163/0x430
 filename_lookup+0x212/0x570
 user_path_at+0x3a/0x60
 __se_sys_chdir+0x91/0x280
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff888112fe2dc8
 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 [ffff888112fe2dc8, ffff888112fe3670)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888112fe4018 pfn:0x112fe0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888108ab1301
flags: 0x57ff00000000040(head|node=1|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 057ff00000000040 ffff88810574fdc0 dead000000000122 0000000000000000
raw: ffff888112fe4018 00000000800d000c 00000000f5000000 ffff888108ab1301
head: 057ff00000000040 ffff88810574fdc0 dead000000000122 0000000000000000
head: ffff888112fe4018 00000000800d000c 00000000f5000000 ffff888108ab1301
head: 057ff00000000003 ffffea00044bf801 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 6480, tgid 6479 (syz.2.167), ts 86240246185, free_ts 0
 post_alloc_hook+0x240/0x2a0
 get_page_from_freelist+0x21e4/0x22c0
 __alloc_frozen_pages_noprof+0x181/0x370
 alloc_pages_mpol+0x232/0x4a0
 allocate_slab+0x8a/0x370
 ___slab_alloc+0xbeb/0x1420
 kmem_cache_alloc_lru_noprof+0x288/0x3d0
 jfs_alloc_inode+0x28/0x70
 alloc_inode+0x6a/0x1b0
 new_inode+0x22/0x170
 jfs_fill_super+0x569/0xd80
 get_tree_bdev_flags+0x40e/0x4d0
 vfs_get_tree+0x92/0x2b0
 do_new_mount+0x2a2/0xa30
 __se_sys_mount+0x317/0x410
 do_syscall_64+0xfa/0x3b0
page_owner free stack trace missing

Memory state around the buggy address:
 ffff888112fe3500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888112fe3580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888112fe3600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc
                                                                ^
 ffff888112fe3680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00 00
 ffff888112fe3700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
