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BUG: KASAN: slab-use-after-free in dtSearch+0x16b4/0x21b0
Read of size 1 at addr ffff8881bbbc738c by task syz.8.2702/14554

CPU: 1 UID: 0 PID: 14554 Comm: syz.8.2702 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
 dtSearch+0x16b4/0x21b0
 jfs_lookup+0x155/0x380
 path_openat+0x1101/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc1ebb8f749
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:00007fc1ec94d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fc1ebde6090 RCX: 00007fc1ebb8f749
RDX: 000000000000275a RSI: 00002000000000c0 RDI: ffffffffffffff9c
RBP: 00007fc1ebc13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc1ebde6128 R14: 00007fc1ebde6090 R15: 00007ffed62c83c8
 </TASK>

Allocated by task 13090:
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_lru_noprof+0x36c/0x6e0
 jfs_alloc_inode+0x28/0x70
 alloc_inode+0x6a/0x1b0
 new_inode+0x22/0x170
 diReadSpecial+0x52/0x710
 jfs_mount+0x73/0x870
 jfs_fill_super+0x6bc/0xd80
 get_tree_bdev_flags+0x40e/0x4d0
 vfs_get_tree+0x92/0x2b0
 do_new_mount+0x302/0xa10
 __se_sys_mount+0x313/0x410
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 12233:
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5c/0x80
 kmem_cache_free+0x19b/0x690
 rcu_core+0xcab/0x1770
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 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+0x157/0x9c0
 evict+0x847/0x9c0
 jfs_umount+0x228/0x3c0
 jfs_put_super+0x8c/0x190
 generic_shutdown_super+0x135/0x2c0
 kill_block_super+0x44/0x90
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x425/0x4c0
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xe9/0x130
 do_syscall_64+0x2bd/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff8881bbbc6de0
 which belongs to the cache jfs_ip of size 2216
The buggy address is located 1452 bytes inside of
 freed 2216-byte region [ffff8881bbbc6de0, ffff8881bbbc7688)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8881bbbc1b78 pfn:0x1bbbc0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88816a6d8701
flags: 0x57ff00000000040(head|node=1|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 057ff00000000040 ffff888101ba5dc0 dead000000000122 0000000000000000
raw: ffff8881bbbc1b78 00000000800d0008 00000000f5000000 ffff88816a6d8701
head: 057ff00000000040 ffff888101ba5dc0 dead000000000122 0000000000000000
head: ffff8881bbbc1b78 00000000800d0008 00000000f5000000 ffff88816a6d8701
head: 057ff00000000003 ffffea0006eef001 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 6253, tgid 6252 (syz.0.150), ts 81115677995, free_ts 69739882042
 post_alloc_hook+0x234/0x290
 get_page_from_freelist+0x2479/0x2550
 __alloc_frozen_pages_noprof+0x181/0x370
 alloc_pages_mpol+0x232/0x4a0
 allocate_slab+0x96/0x350
 ___slab_alloc+0xf56/0x1990
 __slab_alloc+0x65/0x100
 kmem_cache_alloc_lru_noprof+0x3fe/0x6e0
 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+0x302/0xa10
 __se_sys_mount+0x313/0x410
page last free pid 5820 tgid 5820 stack trace:
 __free_frozen_pages+0xbc8/0xd30
 __slab_free+0x2e7/0x390
 qlist_free_all+0x97/0x140
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 kmem_cache_alloc_noprof+0x37d/0x700
 getname_flags+0xb8/0x540
 user_path_at+0x24/0x60
 __x64_sys_umount+0xee/0x160
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff8881bbbc7280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881bbbc7300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881bbbc7380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                      ^
 ffff8881bbbc7400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881bbbc7480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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