==================================================================
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 ffff888046fb42b8 by task kworker/0:3/1351

CPU: 0 UID: 0 PID: 1351 Comm: kworker/0:3 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+0xb02/0x1830 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 5318:
 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+0xa8f/0x2e40 fs/xfs/xfs_icache.c:799
 xfs_lookup+0x321/0x670 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_slow+0x2b7/0x410 fs/namei.c:1916
 lookup_slow+0x53/0x70 fs/namei.c:1933
 walk_component fs/namei.c:2279 [inline]
 lookup_last fs/namei.c:2780 [inline]
 path_lookupat+0x3f5/0x8c0 fs/namei.c:2804
 filename_lookup+0x256/0x5d0 fs/namei.c:2833
 user_path_at+0x40/0x160 fs/namei.c:3612
 do_mount fs/namespace.c:4156 [inline]
 __do_sys_mount fs/namespace.c:4348 [inline]
 __se_sys_mount+0x2dc/0x420 fs/namespace.c:4325
 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 52:
 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+0x187/0x630 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/0x870 kernel/softirq.c:622
 do_softirq+0x76/0xd0 kernel/softirq.c:523
 __local_bh_enable_ip+0xf8/0x130 kernel/softirq.c:450
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 __alloc_skb+0x1aa/0x7d0 net/core/skbuff.c:697
 alloc_skb include/linux/skbuff.h:1383 [inline]
 nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:819 [inline]
 nsim_dev_trap_report drivers/net/netdevsim/dev.c:876 [inline]
 nsim_dev_trap_report_work+0x29a/0xb80 drivers/net/netdevsim/dev.c:922
 process_one_work kernel/workqueue.c:3275 [inline]
 process_scheduled_works+0xb02/0x1830 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

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+0xb0e/0x2e40 fs/xfs/xfs_icache.c:799
 xfs_lookup+0x321/0x670 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_slow+0x2b7/0x410 fs/namei.c:1916
 lookup_slow+0x53/0x70 fs/namei.c:1933
 walk_component fs/namei.c:2279 [inline]
 lookup_last fs/namei.c:2780 [inline]
 path_lookupat+0x3f5/0x8c0 fs/namei.c:2804
 filename_lookup+0x256/0x5d0 fs/namei.c:2833
 user_path_at+0x40/0x160 fs/namei.c:3612
 do_mount fs/namespace.c:4156 [inline]
 __do_sys_mount fs/namespace.c:4348 [inline]
 __se_sys_mount+0x2dc/0x420 fs/namespace.c:4325
 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 ffff888046fb4000
 which belongs to the cache xfs_inode of size 1784
The buggy address is located 696 bytes inside of
 freed 1784-byte region [ffff888046fb4000, ffff888046fb46f8)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888046fb5e00 pfn:0x46fb4
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888046fb7c01
flags: 0x4fff00000000240(workingset|head|node=1|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 04fff00000000240 ffff888030aeb780 ffffea00011be910 ffff888031aa4288
raw: ffff888046fb5e00 0000000800080004 00000000f5000000 ffff888046fb7c01
head: 04fff00000000240 ffff888030aeb780 ffffea00011be910 ffff888031aa4288
head: ffff888046fb5e00 0000000800080004 00000000f5000000 ffff888046fb7c01
head: 04fff00000000002 ffffea00011bed01 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 5318, tgid 5317 (syz.0.0), ts 85498547231, free_ts 0
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x231/0x280 mm/page_alloc.c:1888
 prep_new_page mm/page_alloc.c:1896 [inline]
 get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3961
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5249
 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+0xa8f/0x2e40 fs/xfs/xfs_icache.c:799
 xfs_icreate+0xbe/0x170 fs/xfs/xfs_inode.c:600
 xfs_create+0x648/0xb30 fs/xfs/xfs_inode.c:721
 xfs_generic_create+0x410/0xb30 fs/xfs/xfs_iops.c:216
 vfs_create+0x2d1/0x460 fs/namei.c:4176
 ovl_do_create+0x81/0xf0 fs/overlayfs/overlayfs.h:238
 ovl_create_real+0x223/0x880 fs/overlayfs/dir.c:179
 ovl_create_temp+0x47/0x90 fs/overlayfs/dir.c:253
page_owner free stack trace missing

Memory state around the buggy address:
 ffff888046fb4180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888046fb4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888046fb4280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                        ^
 ffff888046fb4300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888046fb4380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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