ERROR: (device loop3): txCommit: 
==================================================================
BUG: KASAN: slab-out-of-bounds in dtSplitPage+0x1248/0x37c0
Read of size 1 at addr ffff8881b3833fa5 by task syz.3.5391/31361

CPU: 1 UID: 0 PID: 31361 Comm: syz.3.5391 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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_mkdir+0x783/0xb00
 vfs_mkdir+0x511/0x5b0
 do_mkdirat+0x27d/0x4b0
 __x64_sys_mkdirat+0x87/0xa0
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7b69399b97
Code: 00 66 90 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 db f7 ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 b8 02 01 00 00 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:00007f7b675f5e58 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f7b675f5ee0 RCX: 00007f7b69399b97
RDX: 00000000000001ff RSI: 0000200000000040 RDI: 00000000ffffff9c
RBP: 0000200000000000 R08: 0000200000000040 R09: 0000000000000000
R10: 0000200000000000 R11: 0000000000000246 R12: 0000200000000040
R13: 00007f7b675f5ea0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

Allocated by task 31361:
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_lru_noprof+0x35f/0x6c0
 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
 user_path_at+0x3a/0x60
 __se_sys_chdir+0x98/0x280
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff8881b38336f0
 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 [ffff8881b38336f0, ffff8881b3833f98)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b3830
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88816c399501
flags: 0x57ff00000000040(head|node=1|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 057ff00000000040 ffff88810271b780 dead000000000122 0000000000000000
raw: 0000000000000000 00000000800d000d 00000000f5000000 ffff88816c399501
head: 057ff00000000040 ffff88810271b780 dead000000000122 0000000000000000
head: 0000000000000000 00000000800d000d 00000000f5000000 ffff88816c399501
head: 057ff00000000003 ffffea0006ce0c01 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 6301, tgid 6299 (syz.2.92), ts 89456934225, free_ts 85676908499
 post_alloc_hook+0x231/0x280
 get_page_from_freelist+0x24dc/0x2580
 __alloc_frozen_pages_noprof+0x18d/0x380
 alloc_pages_mpol+0x232/0x4a0
 allocate_slab+0x86/0x3a0
 ___slab_alloc+0xd82/0x1760
 __slab_alloc+0x65/0x100
 kmem_cache_alloc_lru_noprof+0x3ed/0x6c0
 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+0x329/0xa50
 __se_sys_mount+0x31d/0x420
page last free pid 5874 tgid 5874 stack trace:
 __free_frozen_pages+0xbb9/0xd10
 __slab_free+0x2ce/0x320
 qlist_free_all+0x97/0x100
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 __kmalloc_cache_noprof+0x36f/0x6e0
 usb_control_msg+0x73/0x3e0
 hub_port_reset+0x450/0x1840
 hub_port_init+0x299/0x28d0
 hub_event+0x2593/0x4f30
 process_scheduled_works+0xaec/0x17a0
 worker_thread+0x89f/0xd90
 kthread+0x726/0x8b0
 ret_from_fork+0x51b/0xa40
 ret_from_fork_asm+0x1a/0x30

Memory state around the buggy address:
 ffff8881b3833e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881b3833f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881b3833f80: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc
                               ^
 ffff8881b3834000: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881b3834080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
