==================================================================
BUG: KASAN: slab-use-after-free in ocfs2_get_system_file_inode+0x179/0x630 fs/ocfs2/sysfile.c:102
Read of size 8 at addr ffff8880273dd090 by task syz-executor/3514

CPU: 1 UID: 0 PID: 3514 Comm: syz-executor Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0xf4/0x170 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:408 [inline]
 print_report+0xca/0x220 mm/kasan/report.c:521
 kasan_report+0x118/0x150 mm/kasan/report.c:634
 ocfs2_get_system_file_inode+0x179/0x630 fs/ocfs2/sysfile.c:102
 ocfs2_remove_inode fs/ocfs2/inode.c:661 [inline]
 ocfs2_wipe_inode fs/ocfs2/inode.c:832 [inline]
 ocfs2_delete_inode fs/ocfs2/inode.c:1093 [inline]
 ocfs2_evict_inode+0xe00/0x3030 fs/ocfs2/inode.c:1230
 evict+0x3ed/0x8e0 fs/inode.c:810
 d_delete_notify include/linux/fsnotify.h:402 [inline]
 vfs_rmdir+0x34f/0x400 fs/namei.c:4467
 do_rmdir+0x212/0x4d0 fs/namei.c:4509
 __do_sys_unlinkat fs/namei.c:4683 [inline]
 __se_sys_unlinkat fs/namei.c:4677 [inline]
 __x64_sys_unlinkat+0x92/0xb0 fs/namei.c:4677
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x8f/0x180 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faf6b71e1c7
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 07 01 00 00 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:00007ffd3dbbb1f8 EFLAGS: 00000207 ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00007faf6b71e1c7
RDX: 0000000000000200 RSI: 00007ffd3dbbc3a0 RDI: 00000000ffffff9c
RBP: 00007faf6b7a1c05 R08: 00005555759bb54b R09: 0000000000000000
R10: 0000000000001000 R11: 0000000000000207 R12: 00007ffd3dbbc3a0
R13: 00007faf6b7a1c05 R14: 000000000001553d R15: 00007ffd3dbbe560
 </TASK>

Allocated by task 3786:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:319 [inline]
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4147 [inline]
 slab_alloc_node mm/slub.c:4196 [inline]
 kmem_cache_alloc_noprof+0x131/0x360 mm/slub.c:4203
 getname_flags+0x9b/0x490 fs/namei.c:146
 getname include/linux/fs.h:2852 [inline]
 do_sys_openat2+0xac/0x180 fs/open.c:1423
 do_sys_open fs/open.c:1444 [inline]
 __do_sys_openat fs/open.c:1460 [inline]
 __se_sys_openat fs/open.c:1455 [inline]
 __x64_sys_openat+0xf3/0x120 fs/open.c:1455
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x8f/0x180 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 3786:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x62/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2380 [inline]
 slab_free mm/slub.c:4642 [inline]
 kmem_cache_free+0x171/0x500 mm/slub.c:4744
 do_sys_openat2+0x125/0x180 fs/open.c:1437
 do_sys_open fs/open.c:1444 [inline]
 __do_sys_openat fs/open.c:1460 [inline]
 __se_sys_openat fs/open.c:1455 [inline]
 __x64_sys_openat+0xf3/0x120 fs/open.c:1455
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x8f/0x180 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff8880273dc400
 which belongs to the cache names_cache of size 4096
The buggy address is located 3216 bytes inside of
 freed 4096-byte region [ffff8880273dc400, ffff8880273dd400)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x273d8
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x80000000000040(head|node=0|zone=1)
page_type: f5(slab)
raw: 0080000000000040 ffff88814040a780 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000070007 00000000f5000000 0000000000000000
head: 0080000000000040 ffff88814040a780 dead000000000122 0000000000000000
head: 0000000000000000 0000000000070007 00000000f5000000 0000000000000000
head: 0080000000000003 ffffea00009cf601 00000000ffffffff 00000000ffffffff
head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3786, tgid 3786 (modprobe), ts 84266413221, free_ts 84241111608
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x168/0x1a0 mm/page_alloc.c:1718
 prep_new_page mm/page_alloc.c:1726 [inline]
 get_page_from_freelist+0x2856/0x28f0 mm/page_alloc.c:3688
 __alloc_frozen_pages_noprof+0x26b/0x460 mm/page_alloc.c:4970
 alloc_pages_mpol+0xcb/0x270 mm/mempolicy.c:2301
 alloc_slab_page mm/slub.c:2450 [inline]
 allocate_slab+0x8a/0x350 mm/slub.c:2618
 new_slab mm/slub.c:2672 [inline]
 ___slab_alloc+0x7fc/0xc60 mm/slub.c:3858
 __slab_alloc mm/slub.c:3948 [inline]
 __slab_alloc_node mm/slub.c:4023 [inline]
 slab_alloc_node mm/slub.c:4184 [inline]
 kmem_cache_alloc_noprof+0xcb/0x360 mm/slub.c:4203
 getname_flags+0x9b/0x490 fs/namei.c:146
 getname include/linux/fs.h:2852 [inline]
 do_sys_openat2+0xac/0x180 fs/open.c:1423
 do_sys_open fs/open.c:1444 [inline]
 __do_sys_openat fs/open.c:1460 [inline]
 __se_sys_openat fs/open.c:1455 [inline]
 __x64_sys_openat+0xf3/0x120 fs/open.c:1455
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x8f/0x180 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 3784 tgid 3784 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1262 [inline]
 __free_frozen_pages+0xa6e/0xc30 mm/page_alloc.c:2725
 discard_slab mm/slub.c:2716 [inline]
 __put_partials+0x15a/0x1b0 mm/slub.c:3185
 __slab_free+0x290/0x370 mm/slub.c:4512
 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:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4147 [inline]
 slab_alloc_node mm/slub.c:4196 [inline]
 __do_kmalloc_node mm/slub.c:4326 [inline]
 __kmalloc_noprof+0x18b/0x470 mm/slub.c:4339
 kmalloc_noprof include/linux/slab.h:909 [inline]
 tomoyo_realpath_from_path+0xf5/0x550 security/tomoyo/realpath.c:251
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_perm+0x1d3/0x460 security/tomoyo/file.c:822
 security_inode_getattr+0xbf/0x1a0 security/security.c:2377
 vfs_getattr fs/stat.c:256 [inline]
 vfs_fstat fs/stat.c:278 [inline]
 __do_sys_newfstat fs/stat.c:546 [inline]
 __se_sys_newfstat+0xd4/0x370 fs/stat.c:543
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x8f/0x180 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff8880273dcf80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880273dd000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880273dd080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                         ^
 ffff8880273dd100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880273dd180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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