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BUG: KASAN: slab-out-of-bounds in ocfs2_find_victim_chain fs/ocfs2/suballoc.c:1445 [inline]
BUG: KASAN: slab-out-of-bounds in ocfs2_claim_suballoc_bits+0x1099/0x2570 fs/ocfs2/suballoc.c:1982
Read of size 4 at addr ffff888036652030 by task syz-executor698/5095

CPU: 0 UID: 0 PID: 5095 Comm: syz-executor698 Not tainted 6.11.0-rc4-syzkaller-00019-gb311c1b497e5 #0
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 lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:488
 kasan_report+0x143/0x180 mm/kasan/report.c:601
 ocfs2_find_victim_chain fs/ocfs2/suballoc.c:1445 [inline]
 ocfs2_claim_suballoc_bits+0x1099/0x2570 fs/ocfs2/suballoc.c:1982
 ocfs2_claim_metadata+0x16d/0x580 fs/ocfs2/suballoc.c:2057
 ocfs2_create_refcount_tree+0x699/0x15f0 fs/ocfs2/refcounttree.c:590
 ocfs2_reflink_remap_blocks+0x2f6/0x1f30 fs/ocfs2/refcounttree.c:4634
 ocfs2_remap_file_range+0x600/0x8e0 fs/ocfs2/file.c:2724
 vfs_copy_file_range+0xc1f/0x1530 fs/read_write.c:1522
 __do_sys_copy_file_range fs/read_write.c:1612 [inline]
 __se_sys_copy_file_range+0x3f2/0x5d0 fs/read_write.c:1575
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb0eb63c099
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffef5f17d48 EFLAGS: 00000212 ORIG_RAX: 0000000000000146
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb0eb63c099
RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 0000000000000000 R08: 0000000000000006 R09: 0000000000000000
R10: 00000000200000c0 R11: 0000000000000212 R12: 00007ffef5f17d90
R13: 00007ffef5f18018 R14: 431bde82d7b634db R15: 00007fb0eb68503b
 </TASK>

Allocated by task 1:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:312 [inline]
 __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3988 [inline]
 slab_alloc_node mm/slub.c:4037 [inline]
 kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4044
 fill_pool lib/debugobjects.c:169 [inline]
 debug_objects_fill_pool+0x70e/0x9b0 lib/debugobjects.c:616
 debug_object_activate+0x135/0x510 lib/debugobjects.c:705
 debug_rcu_head_queue kernel/rcu/rcu.h:227 [inline]
 kvfree_call_rcu+0x99/0x790 kernel/rcu/tree.c:3806
 net_assign_generic net/core/net_namespace.c:118 [inline]
 ops_init+0x2cd/0x610 net/core/net_namespace.c:133
 __register_pernet_operations net/core/net_namespace.c:1252 [inline]
 register_pernet_operations+0x2cb/0x660 net/core/net_namespace.c:1325
 register_pernet_subsys+0x28/0x40 net/core/net_namespace.c:1366
 ip6table_nat_init+0x17/0x80 net/ipv6/netfilter/ip6table_nat.c:155
 do_one_initcall+0x248/0x880 init/main.c:1267
 do_initcall_level+0x157/0x210 init/main.c:1329
 do_initcalls+0x3f/0x80 init/main.c:1345
 kernel_init_freeable+0x435/0x5d0 init/main.c:1578
 kernel_init+0x1d/0x2b0 init/main.c:1467
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

The buggy address belongs to the object at ffff888036652000
 which belongs to the cache debug_objects_cache of size 40
The buggy address is located 8 bytes to the right of
 allocated 40-byte region [ffff888036652000, ffff888036652028)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x36652
anon flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff)
page_type: 0xfdffffff(slab)
raw: 04fff00000000000 ffff88801584f8c0 0000000000000000 0000000000000001
raw: 0000000000000000 0000000000490049 00000001fdffffff 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 0x52020(__GFP_HIGH|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 1, tgid 1 (swapper/0), ts 20845746044, free_ts 20174148557
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1493
 prep_new_page mm/page_alloc.c:1501 [inline]
 get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3439
 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4695
 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
 alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
 alloc_slab_page+0x5f/0x120 mm/slub.c:2321
 allocate_slab+0x5a/0x2f0 mm/slub.c:2484
 new_slab mm/slub.c:2537 [inline]
 ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3723
 __slab_alloc+0x58/0xa0 mm/slub.c:3813
 __slab_alloc_node mm/slub.c:3866 [inline]
 slab_alloc_node mm/slub.c:4025 [inline]
 kmem_cache_alloc_noprof+0x1c1/0x2a0 mm/slub.c:4044
 fill_pool lib/debugobjects.c:169 [inline]
 debug_objects_fill_pool+0x70e/0x9b0 lib/debugobjects.c:616
 debug_object_activate+0x135/0x510 lib/debugobjects.c:705
 debug_rcu_head_queue kernel/rcu/rcu.h:227 [inline]
 kvfree_call_rcu+0x99/0x790 kernel/rcu/tree.c:3806
 net_assign_generic net/core/net_namespace.c:118 [inline]
 ops_init+0x2cd/0x610 net/core/net_namespace.c:133
 __register_pernet_operations net/core/net_namespace.c:1252 [inline]
 register_pernet_operations+0x2cb/0x660 net/core/net_namespace.c:1325
 register_pernet_subsys+0x28/0x40 net/core/net_namespace.c:1366
 ip6table_nat_init+0x17/0x80 net/ipv6/netfilter/ip6table_nat.c:155
 do_one_initcall+0x248/0x880 init/main.c:1267
page last free pid 9 tgid 9 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1094 [inline]
 free_unref_page+0xd22/0xea0 mm/page_alloc.c:2612
 vfree+0x186/0x2e0 mm/vmalloc.c:3364
 delayed_vfree_work+0x56/0x80 mm/vmalloc.c:3285
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
 worker_thread+0x86d/0xd40 kernel/workqueue.c:3390
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Memory state around the buggy address:
 ffff888036651f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888036651f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888036652000: 00 00 00 00 00 fc fc 00 00 00 00 00 fc fc 00 00
                                     ^
 ffff888036652080: 00 00 00 fc fc 00 00 00 00 00 fc fc 00 00 00 00
 ffff888036652100: 00 fc fc 00 00 00 00 00 fc fc 00 00 00 00 00 fc
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