ERROR: (device loop2): txCommit: 
read_mapping_page failed!
ERROR: (device loop2): txCommit: 
==================================================================
BUG: KASAN: slab-out-of-bounds in dtSplitPage+0x12c6/0x3b20
Read of size 1 at addr ffff88801149db1d by task syz.2.202/7042

CPU: 0 UID: 0 PID: 7042 Comm: syz.2.202 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+0xca/0x240
 kasan_report+0x118/0x150
 dtSplitPage+0x12c6/0x3b20
 dtInsert+0x109b/0x5f40
 jfs_mkdir+0x6ec/0xa70
 vfs_mkdir+0x512/0x5b0
 do_mkdirat+0x276/0x4b0
 __x64_sys_mkdirat+0x87/0xa0
 do_syscall_64+0xec/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb9a918df17
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 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:00007fb9a9fede68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007fb9a9fedef0 RCX: 00007fb9a918df17
RDX: 00000000000001ff RSI: 0000200000002340 RDI: 00000000ffffff9c
RBP: 0000200000000340 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000340 R11: 0000000000000246 R12: 0000200000002340
R13: 00007fb9a9fedeb0 R14: 0000000000000000 R15: 0000200000000bc0
 </TASK>

Allocated by task 7042:
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_lru_noprof+0x36c/0x6e0
 jfs_alloc_inode+0x28/0x70
 alloc_inode+0x6a/0x1b0
 iget_locked+0x131/0x6a0
 jfs_iget+0x24/0x470
 jfs_lookup+0x1c5/0x380
 __lookup_slow+0x297/0x3d0
 lookup_slow+0x53/0x70
 path_lookupat+0x3f5/0x8c0
 filename_lookup+0x212/0x570
 user_path_at+0x3a/0x60
 __se_sys_chdir+0x91/0x280
 do_syscall_64+0xec/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88801149d268
 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 [ffff88801149d268, ffff88801149db10)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888011498928 pfn:0x11498
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88810a563801
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff888104287a00 dead000000000122 0000000000000000
raw: ffff888011498928 00000000800d000a 00000000f5000000 ffff88810a563801
head: 00fff00000000040 ffff888104287a00 dead000000000122 0000000000000000
head: ffff888011498928 00000000800d000a 00000000f5000000 ffff88810a563801
head: 00fff00000000003 ffffea0000452601 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 6525, tgid 6506 (syz.3.94), ts 93010294682, free_ts 24968254431
 post_alloc_hook+0x234/0x290
 get_page_from_freelist+0x24e0/0x2580
 __alloc_frozen_pages_noprof+0x181/0x370
 alloc_pages_mpol+0x232/0x4a0
 allocate_slab+0x86/0x3b0
 ___slab_alloc+0xe53/0x1820
 __slab_alloc+0x65/0x100
 kmem_cache_alloc_lru_noprof+0x3fe/0x6e0
 jfs_alloc_inode+0x28/0x70
 alloc_inode+0x6a/0x1b0
 new_inode+0x22/0x170
 ialloc+0x4c/0x8f0
 jfs_create+0x18d/0xa80
 path_openat+0x18bb/0x3dd0
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x200
page last free pid 1 tgid 1 stack trace:
 __free_frozen_pages+0xbc8/0xd30
 free_reserved_page+0xce/0x120
 free_reserved_area+0x90/0x190
 free_kernel_image_pages+0xa2/0x100
 kernel_init+0x31/0x1d0
 ret_from_fork+0x510/0xa50
 ret_from_fork_asm+0x1a/0x30

Memory state around the buggy address:
 ffff88801149da00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88801149da80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88801149db00: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                            ^
 ffff88801149db80: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88801149dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
