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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+0x1099/0x2560 fs/ocfs2/suballoc.c:1982
Read of size 4 at addr ffff8880390a5050 by task syz.0.15/5849

CPU: 0 UID: 0 PID: 5849 Comm: syz.0.15 Not tainted 6.14.0-rc1-syzkaller-g9946eaf552b1 #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:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:489
 kasan_report+0x143/0x180 mm/kasan/report.c:602
 ocfs2_find_victim_chain fs/ocfs2/suballoc.c:1445 [inline]
 ocfs2_claim_suballoc_bits+0x1099/0x2560 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:591
 ocfs2_reflink_remap_blocks+0x2f6/0x1f30 fs/ocfs2/refcounttree.c:4646
 ocfs2_remap_file_range+0x5fa/0x8d0 fs/ocfs2/file.c:2740
 vfs_copy_file_range+0xc07/0x14f0 fs/read_write.c:1584
 __do_sys_copy_file_range fs/read_write.c:1670 [inline]
 __se_sys_copy_file_range+0x3fa/0x600 fs/read_write.c:1637
 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: 0033:0x7f5aee979e79
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:00007f5aedbfe038 EFLAGS: 00000246 ORIG_RAX: 0000000000000146
RAX: ffffffffffffffda RBX: 00007f5aeeb15f80 RCX: 00007f5aee979e79
RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00007f5aee9e7916 R08: 0000000000000006 R09: 0000000000000000
R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f5aeeb15f80 R15: 00007ffc5b0eecb8
 </TASK>

Allocated by task 4734:
 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:319 [inline]
 __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4115 [inline]
 slab_alloc_node mm/slub.c:4164 [inline]
 kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4171
 lsm_inode_alloc security/security.c:755 [inline]
 security_inode_alloc+0x37/0x310 security/security.c:1697
 inode_init_always_gfp+0xa0f/0xd90 fs/inode.c:306
 inode_init_always include/linux/fs.h:3220 [inline]
 alloc_inode+0x9f/0x1a0 fs/inode.c:343
 iget_locked+0xf1/0x5a0 fs/inode.c:1487
 kernfs_get_inode+0x51/0x760 fs/kernfs/inode.c:251
 kernfs_iop_lookup+0x266/0x390 fs/kernfs/dir.c:1215
 __lookup_slow+0x296/0x400 fs/namei.c:1793
 lookup_slow+0x53/0x70 fs/namei.c:1810
 walk_component+0x2e1/0x410 fs/namei.c:2114
 lookup_last fs/namei.c:2612 [inline]
 path_lookupat+0x16f/0x450 fs/namei.c:2636
 filename_lookup+0x2a3/0x670 fs/namei.c:2665
 do_readlinkat+0xf0/0x3a0 fs/stat.c:564
 __do_sys_readlink fs/stat.c:601 [inline]
 __se_sys_readlink fs/stat.c:598 [inline]
 __x64_sys_readlink+0x7f/0x90 fs/stat.c:598
 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

The buggy address belongs to the object at ffff8880390a5000
 which belongs to the cache lsm_inode_cache of size 80
The buggy address is located 0 bytes to the right of
 allocated 80-byte region [ffff8880390a5000, ffff8880390a5050)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x390a5
flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 04fff00000000000 ffff88801be873c0 ffffea000101b0c0 0000000000000004
raw: 0000000000000000 0000000000240024 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 0x52c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 4734, tgid 4734 (udevd), ts 40859113834, free_ts 40856591189
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551
 prep_new_page mm/page_alloc.c:1559 [inline]
 get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3477
 __alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4739
 alloc_pages_mpol+0x311/0x660 mm/mempolicy.c:2270
 alloc_slab_page mm/slub.c:2423 [inline]
 allocate_slab+0x8f/0x3a0 mm/slub.c:2587
 new_slab mm/slub.c:2640 [inline]
 ___slab_alloc+0xc27/0x14a0 mm/slub.c:3826
 __slab_alloc+0x58/0xa0 mm/slub.c:3916
 __slab_alloc_node mm/slub.c:3991 [inline]
 slab_alloc_node mm/slub.c:4152 [inline]
 kmem_cache_alloc_noprof+0x268/0x380 mm/slub.c:4171
 lsm_inode_alloc security/security.c:755 [inline]
 security_inode_alloc+0x37/0x310 security/security.c:1697
 inode_init_always_gfp+0xa0f/0xd90 fs/inode.c:306
 inode_init_always include/linux/fs.h:3220 [inline]
 alloc_inode+0x9f/0x1a0 fs/inode.c:343
 iget_locked+0xf1/0x5a0 fs/inode.c:1487
 kernfs_get_inode+0x51/0x760 fs/kernfs/inode.c:251
 kernfs_iop_lookup+0x266/0x390 fs/kernfs/dir.c:1215
 __lookup_slow+0x296/0x400 fs/namei.c:1793
 lookup_slow+0x53/0x70 fs/namei.c:1810
page last free pid 4734 tgid 4734 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1127 [inline]
 free_frozen_pages+0xe0d/0x10e0 mm/page_alloc.c:2660
 free_pipe_info+0x300/0x390 fs/pipe.c:861
 put_pipe_info fs/pipe.c:720 [inline]
 pipe_release+0x245/0x320 fs/pipe.c:743
 __fput+0x3e9/0x9f0 fs/file_table.c:464
 __do_sys_close fs/open.c:1580 [inline]
 __se_sys_close fs/open.c:1565 [inline]
 __x64_sys_close+0x7f/0x110 fs/open.c:1565
 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

Memory state around the buggy address:
 ffff8880390a4f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880390a4f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880390a5000: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc 00 00
                                                 ^
 ffff8880390a5080: 00 00 00 00 00 00 00 00 fc fc fc fc 00 00 00 00
 ffff8880390a5100: 00 00 00 00 00 00 fc fc fc fc 00 00 00 00 00 00
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