==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_read include/linux/instrumented.h:82 [inline]
BUG: KASAN: slab-use-after-free in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
BUG: KASAN: slab-use-after-free in mapping_unevictable include/linux/pagemap.h:268 [inline]
BUG: KASAN: slab-use-after-free in folio_evictable mm/internal.h:656 [inline]
BUG: KASAN: slab-use-after-free in lru_add+0x25a/0xea0 mm/folio.c:130
Read of size 8 at addr ffff88802170bbc0 by task syz.0.18/6390

CPU: 1 UID: 0 PID: 6390 Comm: syz.0.18 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_address_description+0x55/0x1e0 mm/kasan/report.c:378
 print_report+0x58/0x70 mm/kasan/report.c:482
 kasan_report+0x117/0x150 mm/kasan/report.c:595
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x264/0x2c0 mm/kasan/generic.c:200
 instrument_atomic_read include/linux/instrumented.h:82 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 mapping_unevictable include/linux/pagemap.h:268 [inline]
 folio_evictable mm/internal.h:656 [inline]
 lru_add+0x25a/0xea0 mm/folio.c:130
 folio_batch_move_lru+0x6e9/0xa60 mm/folio.c:194
 __folio_batch_add_and_move+0x510/0xc50 mm/folio.c:225
 shmem_alloc_and_add_folio+0xcc2/0xf60 mm/shmem.c:2241
 shmem_get_folio_gfp+0x594/0x1330 mm/shmem.c:2735
 shmem_get_folio mm/shmem.c:2834 [inline]
 shmem_write_begin+0x16c/0x330 mm/shmem.c:3469
 generic_perform_write+0x2d5/0x8e0 mm/filemap.c:4392
 shmem_file_write_iter+0xf8/0x120 mm/shmem.c:3644
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:687
 ksys_write+0x150/0x270 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb9eaf5d60e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007fb9ebe14da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fb9ebe156c0 RCX: 00007fb9eaf5d60e
RDX: 0000000001000000 RSI: 00007fb9e2000000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 00007fb9ebe14ee0 R14: 00007fb9ebe14ea0 R15: 00007fb9e2000000
 </TASK>

Allocated by task 6386:
 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:351 [inline]
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:377
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4720 [inline]
 slab_alloc_node mm/slub.c:5033 [inline]
 kmem_cache_alloc_noprof+0x2b4/0x600 mm/slub.c:5047
 gfs2_glock_get+0x276/0xf20 fs/gfs2/glock.c:1069
 gfs2_inode_lookup+0x296/0xb90 fs/gfs2/inode.c:150
 gfs2_dir_search+0x168/0x220 fs/gfs2/dir.c:1675
 gfs2_lookupi+0x3ee/0x5c0 fs/gfs2/inode.c:356
 gfs2_jindex_hold fs/gfs2/ops_fstype.c:574 [inline]
 init_journal+0x5b1/0x2390 fs/gfs2/ops_fstype.c:713
 init_inodes+0xdb/0x320 fs/gfs2/ops_fstype.c:844
 gfs2_fill_super+0x193f/0x20b0 fs/gfs2/ops_fstype.c:1250
 get_tree_bdev_flags+0x430/0x4f0 fs/super.c:1883
 gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1331
 vfs_get_tree+0x92/0x2a0 fs/super.c:1943
 fc_mount fs/namespace.c:1209 [inline]
 do_new_mount_fc fs/namespace.c:3785 [inline]
 do_new_mount+0x319/0xdc0 fs/namespace.c:3861
 do_mount fs/namespace.c:4194 [inline]
 __do_sys_mount fs/namespace.c:4407 [inline]
 __se_sys_mount+0x31d/0x420 fs/namespace.c:4384
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 15:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:264 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:296
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2780 [inline]
 slab_free mm/slub.c:6630 [inline]
 kmem_cache_free+0x182/0x650 mm/slub.c:6757
 rcu_do_batch kernel/rcu/tree.c:2650 [inline]
 rcu_core+0x926/0x1260 kernel/rcu/tree.c:2919
 handle_softirqs+0x223/0x840 kernel/softirq.c:645
 run_ksoftirqd+0x36/0x60 kernel/softirq.c:1099
 smpboot_thread_fn+0x565/0xa70 kernel/smpboot.c:160
 kthread+0x38b/0x480 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 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:3287 [inline]
 call_rcu+0x86/0x300 kernel/rcu/tree.c:3395
 gfs2_glock_free+0x3c/0xa0 fs/gfs2/glock.c:150
 gfs2_glock_put_eventually fs/gfs2/super.c:1176 [inline]
 gfs2_evict_inode+0xdfc/0x13f0 fs/gfs2/super.c:1535
 evict+0x624/0xb50 fs/inode.c:823
 gfs2_jindex_free+0x398/0x450 fs/gfs2/super.c:79
 init_journal+0x8dd/0x2390 fs/gfs2/ops_fstype.c:826
 init_inodes+0xdb/0x320 fs/gfs2/ops_fstype.c:844
 gfs2_fill_super+0x193f/0x20b0 fs/gfs2/ops_fstype.c:1250
 get_tree_bdev_flags+0x430/0x4f0 fs/super.c:1883
 gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1331
 vfs_get_tree+0x92/0x2a0 fs/super.c:1943
 fc_mount fs/namespace.c:1209 [inline]
 do_new_mount_fc fs/namespace.c:3785 [inline]
 do_new_mount+0x319/0xdc0 fs/namespace.c:3861
 do_mount fs/namespace.c:4194 [inline]
 __do_sys_mount fs/namespace.c:4407 [inline]
 __se_sys_mount+0x31d/0x420 fs/namespace.c:4384
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Second to 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
 insert_work+0x3d/0x330 kernel/workqueue.c:2356
 __queue_work+0xd3c/0x1360 kernel/workqueue.c:2546
 queue_delayed_work_on+0x11a/0x1e0 kernel/workqueue.c:2767
 queue_delayed_work include/linux/workqueue.h:715 [inline]
 gfs2_glock_queue_work fs/gfs2/glock.c:198 [inline]
 do_xmote+0x539/0x770 fs/gfs2/glock.c:711
 glock_work_func+0x2d4/0x5d0 fs/gfs2/glock.c:982
 process_one_work kernel/workqueue.c:3495 [inline]
 process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3659
 kthread+0x38b/0x480 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

The buggy address belongs to the object at ffff88802170b808
 which belongs to the cache gfs2_glock(aspace) of size 1176
The buggy address is located 952 bytes inside of
 freed 1176-byte region [ffff88802170b808, ffff88802170bca0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x21708
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801e773b40 dead000000000122 0000000000000000
raw: 0000000000000000 00000002000c000c 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff88801e773b40 dead000000000122 0000000000000000
head: 0000000000000000 00000002000c000c 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffffffffffff01 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 Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 6386, tgid 6385 (syz.0.17), ts 117289703707
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1854
 prep_new_page mm/page_alloc.c:1862 [inline]
 get_page_from_freelist+0x220f/0x2280 mm/page_alloc.c:3933
 __alloc_frozen_pages_noprof+0x1fc/0x400 mm/page_alloc.c:5441
 alloc_slab_page mm/slub.c:3384 [inline]
 allocate_slab+0x7d/0x5e0 mm/slub.c:3499
 new_slab mm/slub.c:3550 [inline]
 refill_objects+0x2d5/0x350 mm/slub.c:7539
 refill_sheaf mm/slub.c:2917 [inline]
 __pcs_replace_empty_main+0x2c8/0x6c0 mm/slub.c:4811
 alloc_from_pcs mm/slub.c:4887 [inline]
 slab_alloc_node mm/slub.c:5021 [inline]
 kmem_cache_alloc_noprof+0x394/0x600 mm/slub.c:5047
 gfs2_glock_get+0x276/0xf20 fs/gfs2/glock.c:1069
 gfs2_inode_lookup+0x296/0xb90 fs/gfs2/inode.c:150
 gfs2_dir_search+0x168/0x220 fs/gfs2/dir.c:1675
 gfs2_lookupi+0x3ee/0x5c0 fs/gfs2/inode.c:356
 gfs2_jindex_hold fs/gfs2/ops_fstype.c:574 [inline]
 init_journal+0x5b1/0x2390 fs/gfs2/ops_fstype.c:713
 init_inodes+0xdb/0x320 fs/gfs2/ops_fstype.c:844
 gfs2_fill_super+0x193f/0x20b0 fs/gfs2/ops_fstype.c:1250
 get_tree_bdev_flags+0x430/0x4f0 fs/super.c:1883
 gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1331
page last free pid 1001 tgid 1001 ts 112532787567 stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 __free_pages_prepare mm/page_alloc.c:1401 [inline]
 __free_frozen_pages+0xc97/0xd90 mm/page_alloc.c:2952
 __slab_free+0x269/0x2c0 mm/slub.c:5926
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:361
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4720 [inline]
 slab_alloc_node mm/slub.c:5033 [inline]
 kmem_cache_alloc_node_noprof+0x34f/0x600 mm/slub.c:5105
 __alloc_skb+0x1db/0x7a0 net/core/skbuff.c:704
 alloc_skb include/linux/skbuff.h:1384 [inline]
 nlmsg_new include/net/netlink.h:1055 [inline]
 inet_netconf_notify_devconf+0x173/0x240 net/ipv4/devinet.c:2312
 __devinet_sysctl_unregister net/ipv4/devinet.c:2774 [inline]
 devinet_sysctl_unregister net/ipv4/devinet.c:2798 [inline]
 inetdev_destroy net/ipv4/devinet.c:336 [inline]
 inetdev_event+0x633/0x1610 net/ipv4/devinet.c:1657
 notifier_call_chain+0x1a5/0x3d0 kernel/notifier.c:86
 call_netdevice_notifiers_extack net/core/dev.c:2348 [inline]
 call_netdevice_notifiers net/core/dev.c:2362 [inline]
 unregister_netdevice_many_notify+0x17f4/0x2140 net/core/dev.c:12566
 unregister_netdevice_many net/core/dev.c:12637 [inline]
 default_device_exit_batch+0x6cf/0x760 net/core/dev.c:13349
 ops_exit_list net/core/net_namespace.c:206 [inline]
 ops_undo_list+0x4d7/0x8f0 net/core/net_namespace.c:253
 cleanup_net+0x572/0x810 net/core/net_namespace.c:706
 process_one_work kernel/workqueue.c:3495 [inline]
 process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3659

Memory state around the buggy address:
 ffff88802170ba80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802170bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88802170bb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                           ^
 ffff88802170bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802170bc80: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc
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