==================================================================
BUG: KASAN: use-after-free in generic_test_bit include/asm-generic/bitops/generic-non-atomic.h:128 [inline]
BUG: KASAN: use-after-free in mapping_unevictable include/linux/pagemap.h:252 [inline]
BUG: KASAN: use-after-free in folio_evictable mm/internal.h:157 [inline]
BUG: KASAN: use-after-free in lru_add_fn+0x204/0xda4 mm/swap.c:202
Read of size 8 at addr ffff0000f5940460 by task udevd/4312

CPU: 1 PID: 4312 Comm: udevd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 print_address_description+0x88/0x218 mm/kasan/report.c:316
 print_report+0x50/0x68 mm/kasan/report.c:420
 kasan_report+0xa8/0x100 mm/kasan/report.c:524
 __asan_report_load8_noabort+0x2c/0x38 mm/kasan/report_generic.c:351
 generic_test_bit include/asm-generic/bitops/generic-non-atomic.h:128 [inline]
 mapping_unevictable include/linux/pagemap.h:252 [inline]
 folio_evictable mm/internal.h:157 [inline]
 lru_add_fn+0x204/0xda4 mm/swap.c:202
 folio_batch_move_lru+0x284/0x4c4 mm/swap.c:238
 lru_add_drain_cpu+0xc0/0x4ec mm/swap.c:661
 lru_add_drain+0x8c/0x168 mm/swap.c:765
 __pagevec_release+0x5c/0xf8 mm/swap.c:1052
 pagevec_release include/linux/pagevec.h:71 [inline]
 folio_batch_release include/linux/pagevec.h:135 [inline]
 shmem_undo_range+0x4c4/0x1610 mm/shmem.c:946
 shmem_truncate_range mm/shmem.c:1062 [inline]
 shmem_evict_inode+0x204/0x8a0 mm/shmem.c:1171
 evict+0x3c8/0x810 fs/inode.c:705
 iput_final fs/inode.c:1834 [inline]
 iput+0x764/0x7f4 fs/inode.c:1860
 dentry_unlink_inode+0x360/0x438 fs/dcache.c:405
 __dentry_kill+0x320/0x598 fs/dcache.c:611
 dentry_kill+0xc8/0x248 fs/dcache.c:-1
 dput+0x238/0x454 fs/dcache.c:918
 do_renameat2+0x744/0xa54 fs/namei.c:5029
 __do_sys_renameat fs/namei.c:5067 [inline]
 __se_sys_renameat fs/namei.c:5064 [inline]
 __arm64_sys_renameat+0xc8/0xe4 fs/namei.c:5064
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

Allocated by task 4613:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4c/0x80 mm/kasan/common.c:52
 kasan_save_alloc_info+0x28/0x34 mm/kasan/generic.c:505
 __kasan_slab_alloc+0x70/0x88 mm/kasan/common.c:328
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook+0x74/0x43c mm/slab.h:737
 slab_alloc_node mm/slub.c:3359 [inline]
 slab_alloc mm/slub.c:3367 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3374 [inline]
 kmem_cache_alloc+0x234/0x318 mm/slub.c:3383
 gfs2_glock_get+0x208/0xc60 fs/gfs2/glock.c:1180
 gfs2_inode_lookup+0x1ec/0xab0 fs/gfs2/inode.c:135
 gfs2_dir_search+0x148/0x204 fs/gfs2/dir.c:1664
 gfs2_lookupi+0x3bc/0x58c fs/gfs2/inode.c:323
 gfs2_jindex_hold fs/gfs2/ops_fstype.c:609 [inline]
 init_journal+0x4a8/0x1e14 fs/gfs2/ops_fstype.c:753
 init_inodes+0xe0/0x2d4 fs/gfs2/ops_fstype.c:889
 gfs2_fill_super+0x122c/0x19ec fs/gfs2/ops_fstype.c:1246
 get_tree_bdev+0x358/0x544 fs/super.c:1366
 gfs2_get_tree+0x54/0x1b4 fs/gfs2/ops_fstype.c:1327
 vfs_get_tree+0x90/0x274 fs/super.c:1573
 do_new_mount+0x228/0x810 fs/namespace.c:3069
 path_mount+0x5b4/0xe78 fs/namespace.c:3399
 do_mount fs/namespace.c:3412 [inline]
 __do_sys_mount fs/namespace.c:3620 [inline]
 __se_sys_mount fs/namespace.c:3597 [inline]
 __arm64_sys_mount+0x49c/0x584 fs/namespace.c:3597
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

Freed by task 15:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4c/0x80 mm/kasan/common.c:52
 kasan_save_free_info+0x3c/0x60 mm/kasan/generic.c:516
 ____kasan_slab_free+0x148/0x1b0 mm/kasan/common.c:236
 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:244
 kasan_slab_free include/linux/kasan.h:177 [inline]
 slab_free_hook mm/slub.c:1729 [inline]
 slab_free_freelist_hook+0x16c/0x1ec mm/slub.c:1755
 slab_free mm/slub.c:3687 [inline]
 kmem_cache_free+0x11c/0x324 mm/slub.c:3709
 gfs2_glock_dealloc+0xc0/0xd4 fs/gfs2/glock.c:-1
 rcu_do_batch kernel/rcu/tree.c:2297 [inline]
 rcu_core+0x81c/0x18ac kernel/rcu/tree.c:2557
 rcu_core_si+0x10/0x1c kernel/rcu/tree.c:2574
 handle_softirqs+0x318/0xc6c kernel/softirq.c:596
 run_ksoftirqd+0x7c/0x2a0 kernel/softirq.c:963
 smpboot_thread_fn+0x4b0/0x964 kernel/smpboot.c:164
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850

Last potentially related work creation:
 kasan_save_stack+0x40/0x70 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xc0/0xdc mm/kasan/generic.c:486
 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:496
 call_rcu+0x100/0x954 kernel/rcu/tree.c:2849
 gfs2_glock_free+0x910/0xc20 fs/gfs2/glock.c:178
 __gfs2_glock_put+0x254/0x51c fs/gfs2/glock.c:292
 gfs2_glock_put+0x48/0x58 fs/gfs2/glock.c:314
 gfs2_glock_put_eventually fs/gfs2/super.c:1257 [inline]
 gfs2_evict_inode+0xb78/0xe20 fs/gfs2/super.c:1534
 evict+0x3c8/0x810 fs/inode.c:705
 iput_final fs/inode.c:1834 [inline]
 iput+0x764/0x7f4 fs/inode.c:1860
 gfs2_jindex_free+0x2d0/0x380 fs/gfs2/super.c:75
 init_journal+0x7a0/0x1e14 fs/gfs2/ops_fstype.c:871
 init_inodes+0xe0/0x2d4 fs/gfs2/ops_fstype.c:889
 gfs2_fill_super+0x122c/0x19ec fs/gfs2/ops_fstype.c:1246
 get_tree_bdev+0x358/0x544 fs/super.c:1366
 gfs2_get_tree+0x54/0x1b4 fs/gfs2/ops_fstype.c:1327
 vfs_get_tree+0x90/0x274 fs/super.c:1573
 do_new_mount+0x228/0x810 fs/namespace.c:3069
 path_mount+0x5b4/0xe78 fs/namespace.c:3399
 do_mount fs/namespace.c:3412 [inline]
 __do_sys_mount fs/namespace.c:3620 [inline]
 __se_sys_mount fs/namespace.c:3597 [inline]
 __arm64_sys_mount+0x49c/0x584 fs/namespace.c:3597
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

Second to last potentially related work creation:
 kasan_save_stack+0x40/0x70 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xc0/0xdc mm/kasan/generic.c:486
 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:496
 insert_work+0x64/0x37c kernel/workqueue.c:1361
 __queue_work+0xcbc/0x123c kernel/workqueue.c:1520
 __queue_delayed_work kernel/workqueue.c:1668 [inline]
 queue_delayed_work_on+0x204/0x314 kernel/workqueue.c:1704
 queue_delayed_work include/linux/workqueue.h:527 [inline]
 __gfs2_glock_queue_work fs/gfs2/glock.c:258 [inline]
 gfs2_glock_queue_work fs/gfs2/glock.c:272 [inline]
 do_xmote+0x688/0x1198 fs/gfs2/glock.c:871
 run_queue+0x3b4/0x690 fs/gfs2/glock.c:905
 glock_work_func+0x1fc/0x428 fs/gfs2/glock.c:1089
 process_one_work+0x7f4/0x13a8 kernel/workqueue.c:2292
 worker_thread+0x8c8/0xfbc kernel/workqueue.c:2439
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850

The buggy address belongs to the object at ffff0000f5940000
 which belongs to the cache gfs2_glock(aspace) of size 1224
The buggy address is located 1120 bytes inside of
 1224-byte region [ffff0000f5940000, ffff0000f59404c8)

The buggy address belongs to the physical page:
page:00000000a89df5ad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x135940
head:00000000a89df5ad order:2 compound_mapcount:0 compound_pincount:0
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 0000000000000000 dead000000000122 ffff0000c4bc5e00
raw: 0000000000000000 00000000800c000c 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000f5940300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff0000f5940380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff0000f5940400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                       ^
 ffff0000f5940480: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc
 ffff0000f5940500: fc fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb
==================================================================