loop5: detected capacity change from 0 to 32768
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BUG: KASAN: slab-out-of-bounds in dtReadFirst+0x502/0x930
Read of size 4 at addr ffff88802cfb4700 by task syz.5.1006/8909

CPU: 0 UID: 0 PID: 8909 Comm: syz.5.1006 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
 dtReadFirst+0x502/0x930
 jfs_readdir+0x709/0x3ae0
 wrap_directory_iterator+0x96/0xe0
 iterate_dir+0x399/0x570
 __se_sys_getdents64+0xe4/0x260
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1655d8ec29
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:00007f1653fee038 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007f1655fd5fa0 RCX: 00007f1655d8ec29
RDX: 0000000000001000 RSI: 0000200000000f80 RDI: 0000000000000005
RBP: 00007f1655e11e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1655fd6038 R14: 00007f1655fd5fa0 R15: 00007ffef7415f48
 </TASK>

The buggy address belongs to the object at ffff88802cfb4018
 which belongs to the cache jfs_ip of size 2216
The buggy address is located 1768 bytes inside of
 allocated 2216-byte region [ffff88802cfb4018, ffff88802cfb48c0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2cfb0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888024246901
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801f7348c0 dead000000000122 0000000000000000
raw: 0000000000000000 00000000800d000d 00000000f5000000 ffff888024246901
head: 00fff00000000040 ffff88801f7348c0 dead000000000122 0000000000000000
head: 0000000000000000 00000000800d000d 00000000f5000000 ffff888024246901
head: 00fff00000000003 ffffea0000b3ec01 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 6298 (syz.3.121), ts 83817905787, free_ts 0
 post_alloc_hook+0x240/0x2a0
 get_page_from_freelist+0x2365/0x2440
 __alloc_frozen_pages_noprof+0x181/0x370
 alloc_pages_mpol+0x232/0x4a0
 allocate_slab+0x96/0x3a0
 ___slab_alloc+0xe94/0x1920
 __slab_alloc+0x65/0x100
 kmem_cache_alloc_lru_noprof+0x3ef/0x6d0
 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+0x302/0x9e0
 __se_sys_mount+0x313/0x410
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88802cfb4600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88802cfb4680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88802cfb4700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                   ^
 ffff88802cfb4780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88802cfb4800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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