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BUG: KASAN: slab-use-after-free in dtSplitPage+0x1248/0x37c0
Read of size 1 at addr ffff88801148c045 by task syz.5.201/7245

CPU: 1 UID: 0 PID: 7245 Comm: syz.5.201 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+0x1a9/0x280
 print_report+0xba/0x230
 kasan_report+0x117/0x150
 dtSplitPage+0x1248/0x37c0
 dtInsert+0x107a/0x5de0
 jfs_symlink+0x8b5/0xfd0
 vfs_symlink+0x143/0x2f0
 do_symlinkat+0x1b9/0x400
 __x64_sys_symlink+0x7a/0x90
 do_syscall_64+0xf0/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f40c939acb9
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:00007f40ca19a028 EFLAGS: 00000246 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 00007f40c9615fa0 RCX: 00007f40c939acb9
RDX: 0000000000000000 RSI: 0000200000000cc0 RDI: 000020000000a900
RBP: 00007f40c9408bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f40c9616038 R14: 00007f40c9615fa0 R15: 00007fff2aa00118
 </TASK>

Allocated by task 7245:
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_lru_noprof+0x34f/0x6b0
 jfs_alloc_inode+0x28/0x70
 alloc_inode+0x6a/0x1b0
 new_inode+0x22/0x170
 ialloc+0x4c/0x8f0
 jfs_mkdir+0x1e1/0xb00
 vfs_mkdir+0x306/0x510
 do_mkdirat+0x24f/0x5a0
 __x64_sys_mkdirat+0x87/0xa0
 do_syscall_64+0xf0/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 15:
 kasan_save_track+0x3e/0x80
 __kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5c/0x80
 kmem_cache_free+0x199/0x680
 rcu_core+0xd19/0x1800
 handle_softirqs+0x285/0x880
 run_ksoftirqd+0xa7/0x100
 smpboot_thread_fn+0x541/0xa50
 kthread+0x726/0x8b0
 ret_from_fork+0x4d3/0x870
 ret_from_fork_asm+0x1a/0x30

Last potentially related work creation:
 kasan_save_stack+0x3e/0x60
 kasan_record_aux_stack+0xbd/0xd0
 call_rcu+0x152/0x9e0
 evict+0x892/0xa00
 jfs_mkdir+0x50a/0xb00
 vfs_mkdir+0x306/0x510
 do_mkdirat+0x24f/0x5a0
 __x64_sys_mkdirat+0x87/0xa0
 do_syscall_64+0xf0/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88801148c018
 which belongs to the cache jfs_ip of size 2216
The buggy address is located 45 bytes inside of
 freed 2216-byte region [ffff88801148c018, ffff88801148c8c0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11488
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888112474901
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88816990d140 dead000000000122 0000000000000000
raw: 0000000000000000 00000000800d000d 00000000f5000000 ffff888112474901
head: 00fff00000000040 ffff88816990d140 dead000000000122 0000000000000000
head: 0000000000000000 00000000800d000d 00000000f5000000 ffff888112474901
head: 00fff00000000003 ffffea0000452201 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 6819, tgid 6818 (syz.1.150), ts 87342847701, free_ts 66508549368
 post_alloc_hook+0x234/0x280
 get_page_from_freelist+0x2388/0x2460
 __alloc_frozen_pages_noprof+0x18d/0x380
 alloc_pages_mpol+0x232/0x4a0
 allocate_slab+0x96/0x390
 ___slab_alloc+0xe6c/0x1870
 __slab_alloc+0x65/0x100
 kmem_cache_alloc_lru_noprof+0x3dd/0x6b0
 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+0x92/0x2b0
 do_new_mount+0x329/0xa50
 __se_sys_mount+0x31d/0x420
page last free pid 5809 tgid 5809 stack trace:
 __free_pages_ok+0xa6b/0xbc0
 free_large_kmalloc+0x13a/0x1f0
 zstd_free_workspace_manager+0x2a3/0x360
 btrfs_free_fs_info+0x5e/0x3c0
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x437/0x4d0
 task_work_run+0x1d9/0x270
 exit_to_user_mode_loop+0xe7/0x120
 do_syscall_64+0x2b3/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88801148bf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88801148bf80: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88801148c000: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb
                                           ^
 ffff88801148c080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88801148c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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