loop3: detected capacity change from 0 to 32768
==================================================================
BUG: KASAN: use-after-free in dtSplitPage+0x1bce/0x36a0
Write of size 1 at addr ffff88801eb4e000 by task syz.3.1490/17229

CPU: 0 UID: 0 PID: 17229 Comm: syz.3.1490 Not tainted syzkaller #0 PREEMPT(lazy) 
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_address_description+0x55/0x1e0
 print_report+0x58/0x70
 kasan_report+0x117/0x150
 dtSplitPage+0x1bce/0x36a0
 dtInsert+0x1080/0x5cb0
 jfs_symlink+0x8a1/0xfb0
 vfs_symlink+0x18b/0x330
 filename_symlinkat+0x1cd/0x410
 __se_sys_symlinkat+0x4e/0x2b0
 do_syscall_64+0x166/0x520
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe7cc19e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe7ccfdf028 EFLAGS: 00000246 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 00007fe7cc425fa0 RCX: 00007fe7cc19e159
RDX: 00002000000005c0 RSI: ffffffffffffff9c RDI: 0000200000000700
RBP: 00007fe7cc23506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe7cc426038 R14: 00007fe7cc425fa0 R15: 00007ffc92206498
 </TASK>

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x3fc4 pfn:0x1eb4e
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 ffffea00007ad3c8 ffff888121041720 0000000000000000
raw: 0000000000003fc4 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 52, tgid 52 (kworker/u9:2), ts 433866086804
 post_alloc_hook+0x1f9/0x250
 get_page_from_freelist+0x2209/0x2280
 __alloc_frozen_pages_noprof+0x217/0x5a0
 allocate_slab+0x7d/0x620
 refill_objects+0x2d5/0x350
 __pcs_replace_empty_main+0x2c8/0x6c0
 __kmalloc_node_track_caller_noprof+0x548/0x720
 __alloc_skb+0x2c1/0x7a0
 nsim_dev_trap_report_work+0x25f/0xb40
 process_scheduled_works+0xc3d/0x1630
 worker_thread+0xa47/0xfb0
 kthread+0x38b/0x480
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
page last free pid 16989 tgid 16989 ts 440502701915 stack trace:
 __free_frozen_pages+0xc93/0xd90
 __slab_free+0x274/0x2c0
 qlist_free_all+0x99/0x100
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 kmem_cache_alloc_noprof+0x2b9/0x600
 security_file_alloc+0x34/0x310
 init_file+0x90/0x2b0
 alloc_empty_file+0x74/0x1d0
 path_openat+0xa2/0x1d60
 do_file_open+0x23e/0x4a0
 do_sys_openat2+0x115/0x200
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0x166/0x520
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88801eb4df00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88801eb4df80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88801eb4e000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff88801eb4e080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88801eb4e100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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