read_mapping_page failed!
ERROR: (device loop9): txCommit: 
jfs_create: dtSearch returned -17
==================================================================
BUG: KASAN: slab-out-of-bounds in dtSplitPage+0x12c6/0x3b20
Read of size 1 at addr ffff8881b5b391dd by task syz.9.497/9468

CPU: 1 UID: 0 PID: 9468 Comm: syz.9.497 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_mknod+0x640/0x960
 vfs_mknod+0x52b/0x580
 do_mknodat+0x3cc/0x610
 __x64_sys_mknod+0x8c/0xa0
 do_syscall_64+0xfa/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f927fb8f7c9
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:00007f9280999038 EFLAGS: 00000246 ORIG_RAX: 0000000000000085
RAX: ffffffffffffffda RBX: 00007f927fde5fa0 RCX: 00007f927fb8f7c9
RDX: 0000000000000000 RSI: 0000000000001000 RDI: 0000200000000080
RBP: 00007f927fbf297f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f927fde6038 R14: 00007f927fde5fa0 R15: 00007ffeccde7238
 </TASK>

Allocated by task 9468:
 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+0xfa/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff8881b5b38928
 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 [ffff8881b5b38928, ffff8881b5b391d0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8881b5b3ede0 pfn:0x1b5b38
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff8881baaebc01
flags: 0x57ff00000000040(head|node=1|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 057ff00000000040 ffff8881027d23c0 dead000000000122 0000000000000000
raw: ffff8881b5b3ede0 00000000800d000c 00000000f5000000 ffff8881baaebc01
head: 057ff00000000040 ffff8881027d23c0 dead000000000122 0000000000000000
head: ffff8881b5b3ede0 00000000800d000c 00000000f5000000 ffff8881baaebc01
head: 057ff00000000003 ffffea0006d6ce01 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 6563, tgid 6562 (syz.2.98), ts 87033711491, free_ts 25643670471
 post_alloc_hook+0x234/0x290
 get_page_from_freelist+0x2365/0x2440
 __alloc_frozen_pages_noprof+0x181/0x370
 alloc_pages_mpol+0x232/0x4a0
 allocate_slab+0x86/0x3b0
 ___slab_alloc+0xf2b/0x1960
 __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
 vfs_create+0x3aa/0x400
 do_mknodat+0x3ea/0x610
 __x64_sys_mknod+0x8c/0xa0
page last free pid 1 tgid 1 stack trace:
 __free_frozen_pages+0xbc8/0xd30
 free_contig_range+0x1bd/0x490
 destroy_args+0x69/0x660
 debug_vm_pgtable+0x38f/0x3a0
 do_one_initcall+0x1fb/0x820
 do_initcall_level+0x104/0x190
 do_initcalls+0x59/0xa0
 kernel_init_freeable+0x334/0x4b0
 kernel_init+0x1d/0x1d0
 ret_from_fork+0x599/0xb30
 ret_from_fork_asm+0x1a/0x30

Memory state around the buggy address:
 ffff8881b5b39080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881b5b39100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881b5b39180: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
                                                    ^
 ffff8881b5b39200: fc fc fc fc fc fc fc fc fc fc 00 00 00 00 00 00
 ffff8881b5b39280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
