syzbot

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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:269 [inline]
BUG: KASAN: slab-use-after-free in folio_evictable+0xe4/0x250 mm/internal.h:575
Read of size 8 at addr ffff88804805ec78 by task kswapd1/76

CPU: 0 UID: 0 PID: 76 Comm: kswapd1 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
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:269 [inline]
 folio_evictable+0xe4/0x250 mm/internal.h:575
 sort_folio mm/vmscan.c:4590 [inline]
 scan_folios mm/vmscan.c:4693 [inline]
 isolate_folios mm/vmscan.c:4781 [inline]
 evict_folios+0x1a9d/0x4b40 mm/vmscan.c:4823
 try_to_shrink_lruvec+0xb4f/0xed0 mm/vmscan.c:4983
 shrink_one+0x233/0x730 mm/vmscan.c:5024
 shrink_many mm/vmscan.c:5087 [inline]
 lru_gen_shrink_node mm/vmscan.c:5165 [inline]
 shrink_node+0x3303/0x3b60 mm/vmscan.c:6154
 kswapd_shrink_node mm/vmscan.c:7008 [inline]
 balance_pgdat mm/vmscan.c:7186 [inline]
 kswapd+0x17b6/0x31c0 mm/vmscan.c:7462
 kthread+0x388/0x470 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
 </TASK>

Allocated by task 5805:
 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:4612 [inline]
 slab_alloc_node mm/slub.c:4945 [inline]
 kmem_cache_alloc_noprof+0x2a0/0x5f0 mm/slub.c:4959
 gfs2_glock_get+0x276/0xf20 fs/gfs2/glock.c:1098
 gfs2_inode_lookup+0x2a3/0xc30 fs/gfs2/inode.c:149
 gfs2_dir_search+0x168/0x220 fs/gfs2/dir.c:1663
 gfs2_lookupi+0x45b/0x640 fs/gfs2/inode.c:354
 gfs2_jindex_hold fs/gfs2/ops_fstype.c:573 [inline]
 init_journal+0x5ac/0x2330 fs/gfs2/ops_fstype.c:713
 init_inodes+0xdb/0x320 fs/gfs2/ops_fstype.c:844
 gfs2_fill_super+0x1942/0x20b0 fs/gfs2/ops_fstype.c:1250
 get_tree_bdev_flags+0x430/0x4f0 fs/super.c:1634
 gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1332
 vfs_get_tree+0x92/0x2a0 fs/super.c:1694
 fc_mount fs/namespace.c:1198 [inline]
 do_new_mount_fc fs/namespace.c:3765 [inline]
 do_new_mount+0x319/0xdc0 fs/namespace.c:3841
 do_mount fs/namespace.c:4174 [inline]
 __do_sys_mount fs/namespace.c:4390 [inline]
 __se_sys_mount+0x31d/0x420 fs/namespace.c:4367
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 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: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:2705 [inline]
 slab_free mm/slub.c:6405 [inline]
 kmem_cache_free+0x182/0x650 mm/slub.c:6532
 rcu_do_batch kernel/rcu/tree.c:2645 [inline]
 rcu_core+0x78b/0x10a0 kernel/rcu/tree.c:2897
 handle_softirqs+0x225/0x840 kernel/softirq.c:622
 run_ksoftirqd+0x36/0x60 kernel/softirq.c:1076
 smpboot_thread_fn+0x57c/0xa80 kernel/smpboot.c:160
 kthread+0x388/0x470 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:3159 [inline]
 call_rcu+0xee/0x8b0 kernel/rcu/tree.c:3279
 gfs2_glock_free+0x3c/0xa0 fs/gfs2/glock.c:152
 gfs2_glock_put_eventually fs/gfs2/super.c:1174 [inline]
 gfs2_evict_inode+0xd60/0x1400 fs/gfs2/super.c:1511
 evict+0x624/0xb50 fs/inode.c:825
 gfs2_jindex_free+0x398/0x450 fs/gfs2/super.c:79
 init_journal+0x8d9/0x2330 fs/gfs2/ops_fstype.c:826
 init_inodes+0xdb/0x320 fs/gfs2/ops_fstype.c:844
 gfs2_fill_super+0x1942/0x20b0 fs/gfs2/ops_fstype.c:1250
 get_tree_bdev_flags+0x430/0x4f0 fs/super.c:1634
 gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1332
 vfs_get_tree+0x92/0x2a0 fs/super.c:1694
 fc_mount fs/namespace.c:1198 [inline]
 do_new_mount_fc fs/namespace.c:3765 [inline]
 do_new_mount+0x319/0xdc0 fs/namespace.c:3841
 do_mount fs/namespace.c:4174 [inline]
 __do_sys_mount fs/namespace.c:4390 [inline]
 __se_sys_mount+0x31d/0x420 fs/namespace.c:4367
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 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:2226
 __queue_work+0xcd8/0x10a0 kernel/workqueue.c:2401
 queue_delayed_work_on+0x11a/0x1e0 kernel/workqueue.c:2620
 queue_delayed_work include/linux/workqueue.h:714 [inline]
 gfs2_glock_queue_work fs/gfs2/glock.c:224 [inline]
 do_xmote+0x539/0x770 fs/gfs2/glock.c:745
 glock_work_func+0x2ef/0x600 fs/gfs2/glock.c:1011
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486
 kthread+0x388/0x470 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 ffff88804805e8c0
 which belongs to the cache gfs2_glock(aspace) of size 1176
The buggy address is located 952 bytes inside of
 freed 1176-byte region [ffff88804805e8c0, ffff88804805ed58)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88804805c518 pfn:0x4805c
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x4fff00000000240(workingset|head|node=1|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 04fff00000000240 ffff888031b65780 ffffea0001569810 ffff888031b5ddc8
raw: ffff88804805c518 00000008000c0000 00000000f5000000 0000000000000000
head: 04fff00000000240 ffff888031b65780 ffffea0001569810 ffff888031b5ddc8
head: ffff88804805c518 00000008000c0000 00000000f5000000 0000000000000000
head: 04fff00000000002 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 5805, tgid 5804 (syz.0.51), ts 197515536256, free_ts 197141470387
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1859
 prep_new_page mm/page_alloc.c:1867 [inline]
 get_page_from_freelist+0x21fa/0x2270 mm/page_alloc.c:3946
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5304
 alloc_slab_page mm/slub.c:3294 [inline]
 allocate_slab+0x79/0x5e0 mm/slub.c:3408
 new_slab mm/slub.c:3454 [inline]
 refill_objects+0x2d5/0x350 mm/slub.c:7338
 refill_sheaf mm/slub.c:2832 [inline]
 __pcs_replace_empty_main+0x2bf/0x6b0 mm/slub.c:4703
 alloc_from_pcs mm/slub.c:4801 [inline]
 slab_alloc_node mm/slub.c:4933 [inline]
 kmem_cache_alloc_noprof+0x382/0x5f0 mm/slub.c:4959
 gfs2_glock_get+0x276/0xf20 fs/gfs2/glock.c:1098
 gfs2_inode_lookup+0x2a3/0xc30 fs/gfs2/inode.c:149
 gfs2_lookup_root fs/gfs2/ops_fstype.c:426 [inline]
 init_sb+0xa55/0x1300 fs/gfs2/ops_fstype.c:495
 gfs2_fill_super+0x1615/0x20b0 fs/gfs2/ops_fstype.c:1217
 get_tree_bdev_flags+0x430/0x4f0 fs/super.c:1634
 gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1332
 vfs_get_tree+0x92/0x2a0 fs/super.c:1694
 fc_mount fs/namespace.c:1198 [inline]
 do_new_mount_fc fs/namespace.c:3765 [inline]
 do_new_mount+0x319/0xdc0 fs/namespace.c:3841
 do_mount fs/namespace.c:4174 [inline]
 __do_sys_mount fs/namespace.c:4390 [inline]
 __se_sys_mount+0x31d/0x420 fs/namespace.c:4367
page last free pid 5805 tgid 5804 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1406 [inline]
 __free_frozen_pages+0xc1e/0xd10 mm/page_alloc.c:2950
 stack_depot_save_flags+0x407/0x800 lib/stackdepot.c:735
 kasan_save_stack mm/kasan/common.c:58 [inline]
 kasan_save_track+0x4f/0x80 mm/kasan/common.c:78
 poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
 __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __do_kmalloc_node mm/slub.c:5362 [inline]
 __kmalloc_node_track_caller_noprof+0x4c3/0x730 mm/slub.c:5497
 kvasprintf+0xeb/0x1a0 lib/kasprintf.c:25
 kasprintf+0xe2/0x140 lib/kasprintf.c:59
 wq_init_lockdep kernel/workqueue.c:4935 [inline]
 alloc_workqueue_va kernel/workqueue.c:5948 [inline]
 alloc_workqueue_noprof+0x12e/0x210 kernel/workqueue.c:5962
 gfs2_fill_super+0x1284/0x20b0 fs/gfs2/ops_fstype.c:1188
 get_tree_bdev_flags+0x430/0x4f0 fs/super.c:1634
 gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1332
 vfs_get_tree+0x92/0x2a0 fs/super.c:1694
 fc_mount fs/namespace.c:1198 [inline]
 do_new_mount_fc fs/namespace.c:3765 [inline]
 do_new_mount+0x319/0xdc0 fs/namespace.c:3841
 do_mount fs/namespace.c:4174 [inline]
 __do_sys_mount fs/namespace.c:4390 [inline]
 __se_sys_mount+0x31d/0x420 fs/namespace.c:4367
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88804805eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88804805eb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88804805ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                                ^
 ffff88804805ec80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88804805ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc
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