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BUG: KASAN: slab-use-after-free in dtSearch+0x1683/0x21b0
Read of size 1 at addr ffff88801fcf5958 by task syz.9.1517/17803

CPU: 1 UID: 0 PID: 17803 Comm: syz.9.1517 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+0xe8/0x150
 print_report+0xba/0x230
 kasan_report+0x117/0x150
 dtSearch+0x1683/0x21b0
 jfs_lookup+0x1b0/0x420
 lookup_one_qstr_excl+0x131/0x360
 filename_create+0x20e/0x370
 filename_mknodat+0x18c/0x660
 __se_sys_mknodat+0x3b/0x150
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2e2a99c799
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:00007f2e2b87f028 EFLAGS: 00000246 ORIG_RAX: 0000000000000103
RAX: ffffffffffffffda RBX: 00007f2e2ac15fa0 RCX: 00007f2e2a99c799
RDX: 0000000000006000 RSI: 0000200000000180 RDI: ffffffffffffff9c
RBP: 00007f2e2aa32c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000712 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2e2ac16038 R14: 00007f2e2ac15fa0 R15: 00007ffc1d5edb28
 </TASK>

Allocated by task 17072:
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_lru_noprof+0x2b8/0x640
 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+0x341/0xd30
 __se_sys_mount+0x31d/0x420
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 16003:
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5c/0x80
 kmem_cache_free+0x187/0x630
 rcu_core+0x7cd/0x1070
 handle_softirqs+0x22a/0x870
 __irq_exit_rcu+0x5f/0x150
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20

Last potentially related work creation:
 kasan_save_stack+0x3e/0x60
 kasan_record_aux_stack+0xbd/0xd0
 call_rcu+0xee/0x890
 evict+0x95b/0xb10
 jfs_put_super+0x148/0x190
 generic_shutdown_super+0x13d/0x2d0
 kill_block_super+0x44/0x90
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x437/0x4d0
 task_work_run+0x1d9/0x270
 do_exit+0x70f/0x23c0
 do_group_exit+0x21b/0x2d0
 __x64_sys_exit_group+0x3f/0x40
 x64_sys_call+0x221a/0x2240
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88801fcf5268
 which belongs to the cache jfs_ip of size 2216
The buggy address is located 1776 bytes inside of
 freed 2216-byte region [ffff88801fcf5268, ffff88801fcf5b10)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88801fcf6de0 pfn:0x1fcf0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88801fcf7709
flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000240 ffff888102b6a140 ffff888102705b88 ffffea00007f0810
raw: ffff88801fcf6de0 00000008000d000c 00000000f5000000 ffff88801fcf7709
head: 00fff00000000240 ffff888102b6a140 ffff888102705b88 ffffea00007f0810
head: ffff88801fcf6de0 00000008000d000c 00000000f5000000 ffff88801fcf7709
head: 00fff00000000003 ffffea00007f3c01 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 6105, tgid 6104 (syz.1.34), ts 77065840946, free_ts 76488447762
 post_alloc_hook+0x231/0x280
 get_page_from_freelist+0x24dc/0x2580
 __alloc_frozen_pages_noprof+0x18d/0x380
 allocate_slab+0x77/0x660
 refill_objects+0x331/0x3c0
 __pcs_replace_empty_main+0x2e6/0x730
 kmem_cache_alloc_lru_noprof+0x37c/0x640
 jfs_alloc_inode+0x28/0x70
 alloc_inode+0x6a/0x1b0
 iget_locked+0x131/0x6a0
 jfs_iget+0x24/0x470
 jfs_fill_super+0x8ad/0xd80
 get_tree_bdev_flags+0x431/0x4f0
 vfs_get_tree+0x92/0x2a0
 do_new_mount+0x341/0xd30
 __se_sys_mount+0x31d/0x420
page last free pid 5256 tgid 5256 stack trace:
 __free_frozen_pages+0xc2b/0xdb0
 __slab_free+0x263/0x2b0
 qlist_free_all+0x97/0x100
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 kmem_cache_alloc_noprof+0x2bc/0x650
 do_getname+0x2e/0x250
 do_readlinkat+0xc8/0x510
 __x64_sys_readlink+0x7f/0x90
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88801fcf5800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88801fcf5880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88801fcf5900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                    ^
 ffff88801fcf5980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88801fcf5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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