loop0: detected capacity change from 0 to 32768
=======================================================
WARNING: The mand mount option has been deprecated and
         and is ignored by this kernel. Remove the mand
         option from the mount to silence this warning.
=======================================================
ocfs2: Mounting device (7,0) on (node local, slot 0) with writeback data mode.
==================================================================
BUG: KASAN: slab-use-after-free in ocfs2_find_victim_chain fs/ocfs2/suballoc.c:1447 [inline]
BUG: KASAN: slab-use-after-free in ocfs2_claim_suballoc_bits+0x8b2/0x2450 fs/ocfs2/suballoc.c:1996
Read of size 4 at addr ffff888043757000 by task syz.0.0/5330

CPU: 0 UID: 0 PID: 5330 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xca/0x240 mm/kasan/report.c:482
 kasan_report+0x118/0x150 mm/kasan/report.c:595
 ocfs2_find_victim_chain fs/ocfs2/suballoc.c:1447 [inline]
 ocfs2_claim_suballoc_bits+0x8b2/0x2450 fs/ocfs2/suballoc.c:1996
 ocfs2_claim_new_inode+0x332/0x7a0 fs/ocfs2/suballoc.c:2292
 ocfs2_mknod_locked+0x100/0x250 fs/ocfs2/namei.c:637
 ocfs2_mknod+0x10c7/0x2050 fs/ocfs2/namei.c:384
 ocfs2_create+0x1a5/0x440 fs/ocfs2/namei.c:676
 lookup_open fs/namei.c:3796 [inline]
 open_last_lookups fs/namei.c:3895 [inline]
 path_openat+0x14f1/0x3830 fs/namei.c:4131
 do_filp_open+0x1fa/0x410 fs/namei.c:4161
 do_sys_openat2+0x121/0x1c0 fs/open.c:1437
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_open fs/open.c:1460 [inline]
 __se_sys_open fs/open.c:1456 [inline]
 __x64_sys_open+0x11e/0x150 fs/open.c:1456
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f492e98eec9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f492f813038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f492ebe5fa0 RCX: 00007f492e98eec9
RDX: 0000000000000000 RSI: 0000000000145142 RDI: 0000200000000240
RBP: 00007f492ea11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f492ebe6038 R14: 00007f492ebe5fa0 R15: 00007ffdbd15a438
 </TASK>

Allocated by task 5302:
 kasan_save_stack mm/kasan/common.c:56 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
 unpoison_slab_object mm/kasan/common.c:342 [inline]
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:368
 kasan_slab_alloc include/linux/kasan.h:252 [inline]
 slab_post_alloc_hook mm/slub.c:4946 [inline]
 kmem_cache_alloc_from_sheaf_noprof+0x9c/0x160 mm/slub.c:5516
 mas_pop_node lib/maple_tree.c:1084 [inline]
 mas_new_ma_node lib/maple_tree.c:2138 [inline]
 mas_split_final_node+0x1a9/0x580 lib/maple_tree.c:2814
 mas_push_data+0x97d/0xcd0 lib/maple_tree.c:2961
 mas_split lib/maple_tree.c:3025 [inline]
 mas_commit_b_node+0x919/0x1090 lib/maple_tree.c:3070
 mas_wr_bnode lib/maple_tree.c:3737 [inline]
 mas_wr_store_entry+0x51d/0x2790 lib/maple_tree.c:3769
 mas_store_prealloc+0xaf2/0x1030 lib/maple_tree.c:5167
 vma_iter_store_new mm/vma.h:488 [inline]
 vma_complete+0x224/0xae0 mm/vma.c:354
 __split_vma+0x8a6/0xa00 mm/vma.c:568
 vms_gather_munmap_vmas+0x4c6/0x12e0 mm/vma.c:1380
 __mmap_prepare mm/vma.c:2359 [inline]
 __mmap_region mm/vma.c:2652 [inline]
 mmap_region+0x722/0x2110 mm/vma.c:2740
 do_mmap+0xc45/0x10d0 mm/mmap.c:558
 vm_mmap_pgoff+0x2a6/0x4d0 mm/util.c:580
 ksys_mmap_pgoff+0x51f/0x760 mm/mmap.c:604
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 1047:
 kasan_save_stack mm/kasan/common.c:56 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
 __kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:587
 kasan_save_free_info mm/kasan/kasan.h:406 [inline]
 poison_slab_object mm/kasan/common.c:252 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:284
 kasan_slab_free include/linux/kasan.h:234 [inline]
 slab_free_hook mm/slub.c:2514 [inline]
 slab_free_freelist_hook mm/slub.c:2543 [inline]
 slab_free_bulk mm/slub.c:6598 [inline]
 kmem_cache_free_bulk+0xb2c/0xdd0 mm/slub.c:7282
 kfree_bulk include/linux/slab.h:830 [inline]
 kvfree_rcu_bulk+0xe5/0x1f0 mm/slab_common.c:1522
 kvfree_rcu_drain_ready mm/slab_common.c:1729 [inline]
 kfree_rcu_monitor+0x211/0x2a0 mm/slab_common.c:1802
 process_one_work kernel/workqueue.c:3263 [inline]
 process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3346
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x439/0x7d0 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:56
 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:559
 kvfree_call_rcu+0x130/0x4c0 mm/slab_common.c:1995
 ma_free_rcu lib/maple_tree.c:206 [inline]
 mas_topiary_node lib/maple_tree.c:2309 [inline]
 mas_topiary_replace lib/maple_tree.c:2408 [inline]
 mas_wmb_replace+0x10d8/0x1820 lib/maple_tree.c:2431
 mas_split lib/maple_tree.c:3050 [inline]
 mas_commit_b_node+0xbf7/0x1090 lib/maple_tree.c:3070
 mas_wr_bnode lib/maple_tree.c:3737 [inline]
 mas_wr_store_entry+0x51d/0x2790 lib/maple_tree.c:3769
 mas_store_prealloc+0xaf2/0x1030 lib/maple_tree.c:5167
 vma_iter_store_new mm/vma.h:488 [inline]
 vma_complete+0x224/0xae0 mm/vma.c:354
 __split_vma+0x8a6/0xa00 mm/vma.c:568
 vms_gather_munmap_vmas+0x2e2/0x12e0 mm/vma.c:1359
 __mmap_prepare mm/vma.c:2359 [inline]
 __mmap_region mm/vma.c:2652 [inline]
 mmap_region+0x722/0x2110 mm/vma.c:2740
 do_mmap+0xc45/0x10d0 mm/mmap.c:558
 vm_mmap_pgoff+0x2a6/0x4d0 mm/util.c:580
 ksys_mmap_pgoff+0x51f/0x760 mm/mmap.c:604
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff888043757000
 which belongs to the cache maple_node of size 256
The buggy address is located 0 bytes inside of
 freed 256-byte region [ffff888043757000, ffff888043757100)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888043757800 pfn:0x43757
flags: 0x4fff00000000200(workingset|node=1|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 04fff00000000200 ffff88801a04bc80 ffffea00010d6610 ffffea0001085f10
raw: ffff888043757800 0000000000080002 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5302, tgid 5302 (sshd-session), ts 60690999000, free_ts 55475636448
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1850
 prep_new_page mm/page_alloc.c:1858 [inline]
 get_page_from_freelist+0x2365/0x2440 mm/page_alloc.c:3884
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5183
 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416
 alloc_slab_page mm/slub.c:3030 [inline]
 allocate_slab+0x96/0x3a0 mm/slub.c:3203
 new_slab mm/slub.c:3257 [inline]
 ___slab_alloc+0xe94/0x1920 mm/slub.c:4627
 __kmem_cache_alloc_bulk+0x1e2/0x590 mm/slub.c:7330
 refill_sheaf mm/slub.c:2608 [inline]
 kmem_cache_prefill_sheaf+0x28a/0x440 mm/slub.c:5372
 mt_get_sheaf lib/maple_tree.c:187 [inline]
 mas_alloc_nodes+0x1c2/0x350 lib/maple_tree.c:1138
 mas_preallocate+0x2e0/0x670 lib/maple_tree.c:5192
 vma_iter_prealloc mm/vma.h:442 [inline]
 __split_vma+0x2fa/0xa00 mm/vma.c:528
 vms_gather_munmap_vmas+0x4c6/0x12e0 mm/vma.c:1380
 __mmap_prepare mm/vma.c:2359 [inline]
 __mmap_region mm/vma.c:2652 [inline]
 mmap_region+0x722/0x2110 mm/vma.c:2740
 do_mmap+0xc45/0x10d0 mm/mmap.c:558
 vm_mmap_pgoff+0x2a6/0x4d0 mm/util.c:580
 ksys_mmap_pgoff+0x51f/0x760 mm/mmap.c:604
page last free pid 5278 tgid 5278 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1394 [inline]
 __free_frozen_pages+0xbc4/0xd30 mm/page_alloc.c:2906
 __slab_free+0x2e7/0x390 mm/slub.c:5923
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:352
 kasan_slab_alloc include/linux/kasan.h:252 [inline]
 slab_post_alloc_hook mm/slub.c:4946 [inline]
 slab_alloc_node mm/slub.c:5245 [inline]
 __do_kmalloc_node mm/slub.c:5602 [inline]
 __kmalloc_noprof+0x3c3/0x7f0 mm/slub.c:5615
 kmalloc_noprof include/linux/slab.h:961 [inline]
 tomoyo_realpath_from_path+0xe3/0x5d0 security/tomoyo/realpath.c:251
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_perm+0x213/0x4b0 security/tomoyo/file.c:822
 security_inode_getattr+0x12f/0x330 security/security.c:2416
 vfs_getattr fs/stat.c:259 [inline]
 vfs_fstat fs/stat.c:281 [inline]
 __do_sys_newfstat fs/stat.c:555 [inline]
 __se_sys_newfstat fs/stat.c:550 [inline]
 __x64_sys_newfstat+0xfc/0x200 fs/stat.c:550
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff888043756f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888043756f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888043757000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff888043757080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888043757100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================