==================================================================
BUG: KASAN: slab-use-after-free in inode_state_read_once include/linux/fs.h:884 [inline]
BUG: KASAN: slab-use-after-free in iput+0x3a7/0xe80 fs/inode.c:1986
Read of size 4 at addr ffff888011ad2838 by task kworker/0:6/5320

CPU: 0 UID: 0 PID: 5320 Comm: kworker/0:6 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Workqueue: events fserror_worker
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xba/0x230 mm/kasan/report.c:482
 kasan_report+0x117/0x150 mm/kasan/report.c:595
 inode_state_read_once include/linux/fs.h:884 [inline]
 iput+0x3a7/0xe80 fs/inode.c:1986
 fserror_worker+0x230/0x350 fs/fserror.c:69
 process_one_work kernel/workqueue.c:3275 [inline]
 process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3358
 worker_thread+0xa50/0xfc0 kernel/workqueue.c:3439
 kthread+0x388/0x470 kernel/kthread.c:467
 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Allocated by task 5322:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 unpoison_slab_object mm/kasan/common.c:340 [inline]
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4459 [inline]
 slab_alloc_node mm/slub.c:4788 [inline]
 kmem_cache_alloc_lru_noprof+0x2b8/0x640 mm/slub.c:4807
 xfs_inode_alloc+0x7e/0x710 fs/xfs/xfs_icache.c:97
 xfs_iget_cache_miss fs/xfs/xfs_icache.c:635 [inline]
 xfs_iget+0xa85/0x2ce0 fs/xfs/xfs_icache.c:799
 xfs_lookup+0x321/0x630 fs/xfs/xfs_inode.c:553
 xfs_vn_lookup+0x130/0x200 fs/xfs/xfs_iops.c:327
 __lookup_slow+0x2b7/0x410 fs/namei.c:1916
 lookup_slow+0x53/0x70 fs/namei.c:1933
 ovl_lookup_positive_unlocked fs/overlayfs/namei.c:211 [inline]
 ovl_lookup_single+0x32f/0xea0 fs/overlayfs/namei.c:255
 ovl_lookup_layer+0x377/0x450 fs/overlayfs/namei.c:360
 ovl_lookup_layers fs/overlayfs/namei.c:1163 [inline]
 ovl_lookup+0x9b0/0x1c80 fs/overlayfs/namei.c:1398
 lookup_one_qstr_excl+0x131/0x360 fs/namei.c:1805
 __start_dirop fs/namei.c:2925 [inline]
 start_dirop fs/namei.c:2934 [inline]
 filename_unlinkat+0x2ba/0x610 fs/namei.c:5521
 __do_sys_unlinkat fs/namei.c:5569 [inline]
 __se_sys_unlinkat+0x83/0x1a0 fs/namei.c:5561
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 1:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:253 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2670 [inline]
 slab_free mm/slub.c:6082 [inline]
 kmem_cache_free+0x180/0x610 mm/slub.c:6212
 rcu_do_batch kernel/rcu/tree.c:2617 [inline]
 rcu_core+0x7cd/0x1070 kernel/rcu/tree.c:2869
 handle_softirqs+0x22a/0x7c0 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697

Last potentially related work creation:
 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57
 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556
 __call_rcu_common kernel/rcu/tree.c:3131 [inline]
 call_rcu+0xee/0x890 kernel/rcu/tree.c:3251
 xfs_iget_cache_miss fs/xfs/xfs_icache.c:740 [inline]
 xfs_iget+0xb01/0x2ce0 fs/xfs/xfs_icache.c:799
 xfs_lookup+0x321/0x630 fs/xfs/xfs_inode.c:553
 xfs_vn_lookup+0x130/0x200 fs/xfs/xfs_iops.c:327
 __lookup_slow+0x2b7/0x410 fs/namei.c:1916
 lookup_slow+0x53/0x70 fs/namei.c:1933
 ovl_lookup_positive_unlocked fs/overlayfs/namei.c:211 [inline]
 ovl_lookup_single+0x32f/0xea0 fs/overlayfs/namei.c:255
 ovl_lookup_layer+0x377/0x450 fs/overlayfs/namei.c:360
 ovl_lookup_layers fs/overlayfs/namei.c:1163 [inline]
 ovl_lookup+0x9b0/0x1c80 fs/overlayfs/namei.c:1398
 lookup_one_qstr_excl+0x131/0x360 fs/namei.c:1805
 __start_dirop fs/namei.c:2925 [inline]
 start_dirop fs/namei.c:2934 [inline]
 filename_unlinkat+0x2ba/0x610 fs/namei.c:5521
 __do_sys_unlinkat fs/namei.c:5569 [inline]
 __se_sys_unlinkat+0x83/0x1a0 fs/namei.c:5561
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff888011ad2580
 which belongs to the cache xfs_inode of size 1784
The buggy address is located 696 bytes inside of
 freed 1784-byte region [ffff888011ad2580, ffff888011ad2c78)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11ad0
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888011ad3c01
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff8880317eaa00 dead000000000100 dead000000000122
raw: 0000000000000000 0000000800080008 00000000f5000000 ffff888011ad3c01
head: 00fff00000000040 ffff8880317eaa00 dead000000000100 dead000000000122
head: 0000000000000000 0000000800080008 00000000f5000000 ffff888011ad3c01
head: 00fff00000000002 ffffea000046b401 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Reclaimable, gfp_mask 0xd2050(__GFP_RECLAIMABLE|__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5322, tgid 5321 (syz.0.0), ts 88550091105, free_ts 87456860217
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x231/0x280 mm/page_alloc.c:1883
 prep_new_page mm/page_alloc.c:1891 [inline]
 get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3956
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5244
 alloc_slab_page mm/slub.c:3238 [inline]
 allocate_slab+0x77/0x660 mm/slub.c:3411
 new_slab mm/slub.c:3469 [inline]
 refill_objects+0x331/0x3c0 mm/slub.c:7091
 refill_sheaf mm/slub.c:2787 [inline]
 __pcs_replace_empty_main+0x2b9/0x620 mm/slub.c:4536
 alloc_from_pcs mm/slub.c:4639 [inline]
 slab_alloc_node mm/slub.c:4773 [inline]
 kmem_cache_alloc_lru_noprof+0x37c/0x640 mm/slub.c:4807
 xfs_inode_alloc+0x7e/0x710 fs/xfs/xfs_icache.c:97
 xfs_iget_cache_miss fs/xfs/xfs_icache.c:635 [inline]
 xfs_iget+0xa85/0x2ce0 fs/xfs/xfs_icache.c:799
 xfs_icreate fs/xfs/xfs_inode.c:600 [inline]
 xfs_create_tmpfile+0x309/0x610 fs/xfs/xfs_inode.c:829
 xfs_generic_create+0x3f6/0xb30 fs/xfs/xfs_iops.c:227
 xfs_vn_tmpfile+0x63/0xd0 fs/xfs/xfs_iops.c:1276
 vfs_tmpfile+0x3ff/0x890 fs/namei.c:4722
 kernel_tmpfile_open+0x4d/0x90 fs/namei.c:4766
 ovl_do_tmpfile fs/overlayfs/overlayfs.h:400 [inline]
 ovl_make_workdir fs/overlayfs/super.c:708 [inline]
 ovl_get_workdir fs/overlayfs/super.c:840 [inline]
 ovl_fill_super_creds fs/overlayfs/super.c:1453 [inline]
 ovl_fill_super+0x3c2c/0x5e60 fs/overlayfs/super.c:1567
 vfs_get_super fs/super.c:1327 [inline]
 get_tree_nodev+0xbb/0x150 fs/super.c:1346
page last free pid 4710 tgid 4710 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1432 [inline]
 __free_frozen_pages+0xc01/0xd80 mm/page_alloc.c:2972
 __slab_free+0x263/0x2b0 mm/slub.c:5490
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4459 [inline]
 slab_alloc_node mm/slub.c:4788 [inline]
 kmem_cache_alloc_noprof+0x2bc/0x650 mm/slub.c:4795
 alloc_filename fs/namei.c:142 [inline]
 do_getname+0x2e/0x250 fs/namei.c:182
 getname include/linux/fs.h:2512 [inline]
 class_filename_constructor include/linux/fs.h:2539 [inline]
 do_sys_openat2+0xca/0x200 fs/open.c:1365
 do_sys_open fs/open.c:1372 [inline]
 __do_sys_openat fs/open.c:1388 [inline]
 __se_sys_openat fs/open.c:1383 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1383
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff888011ad2700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888011ad2780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888011ad2800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                        ^
 ffff888011ad2880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888011ad2900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================