==================================================================
BUG: KASAN: slab-out-of-bounds in nilfs_iget_test+0xa1/0x330 fs/nilfs2/inode.c:544
Read of size 8 at addr ffff88802fe87ff8 by task syz-executor.2/7966

CPU: 1 PID: 7966 Comm: syz-executor.2 Not tainted 6.1.0-rc4-syzkaller-00356-g8f2975c2bb4c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106
 print_address_description+0x74/0x340 mm/kasan/report.c:284
 print_report+0x107/0x1f0 mm/kasan/report.c:395
 kasan_report+0xcd/0x100 mm/kasan/report.c:495
 nilfs_iget_test+0xa1/0x330 fs/nilfs2/inode.c:544
 find_inode+0x1ac/0x4c0 fs/inode.c:915
 ilookup5_nowait fs/inode.c:1428 [inline]
 ilookup5+0x9d/0x1d0 fs/inode.c:1457
 iget5_locked+0x33/0x270 fs/inode.c:1238
 nilfs_iget_locked+0x140/0x1d0 fs/nilfs2/inode.c:605
 nilfs_dat_read+0xbd/0x300 fs/nilfs2/dat.c:483
 nilfs_load_super_root fs/nilfs2/the_nilfs.c:120 [inline]
 load_nilfs+0x4c8/0xfc0 fs/nilfs2/the_nilfs.c:269
 nilfs_fill_super+0x27e/0x5d0 fs/nilfs2/super.c:1059
 nilfs_mount+0x613/0x9b0 fs/nilfs2/super.c:1315
 legacy_get_tree+0xea/0x180 fs/fs_context.c:610
 vfs_get_tree+0x88/0x270 fs/super.c:1531
 do_new_mount+0x289/0xad0 fs/namespace.c:3040
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fa43848cb6a
Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 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:00007fa4391e4f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007fa43848cb6a
RDX: 00000000200000c0 RSI: 0000000020000100 RDI: 00007fa4391e4fe0
RBP: 00007fa4391e5020 R08: 00007fa4391e5020 R09: 00000000200000c0
R10: 0000000000000000 R11: 0000000000000202 R12: 00000000200000c0
R13: 0000000020000100 R14: 00007fa4391e4fe0 R15: 0000000020001180
 </TASK>

Allocated by task 7960:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x3d/0x60 mm/kasan/common.c:52
 __kasan_slab_alloc+0x65/0x70 mm/kasan/common.c:325
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slab.h:737 [inline]
 slab_alloc_node mm/slub.c:3398 [inline]
 slab_alloc mm/slub.c:3406 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3413 [inline]
 kmem_cache_alloc_lru+0x180/0x2e0 mm/slub.c:3429
 alloc_inode_sb include/linux/fs.h:3117 [inline]
 proc_alloc_inode+0x23/0xb0 fs/proc/inode.c:67
 alloc_inode fs/inode.c:259 [inline]
 new_inode_pseudo+0x61/0x1d0 fs/inode.c:1018
 new_inode+0x25/0x1d0 fs/inode.c:1046
 proc_pid_make_inode+0x21/0x1c0 fs/proc/base.c:1897
 proc_pident_instantiate+0x74/0x2f0 fs/proc/base.c:2643
 proc_pident_lookup+0x1d5/0x280 fs/proc/base.c:2679
 lookup_open fs/namei.c:3391 [inline]
 open_last_lookups fs/namei.c:3481 [inline]
 path_openat+0x10e6/0x2df0 fs/namei.c:3710
 do_filp_open+0x264/0x4f0 fs/namei.c:3740
 do_sys_openat2+0x124/0x4e0 fs/open.c:1310
 do_sys_open fs/open.c:1326 [inline]
 __do_sys_openat fs/open.c:1342 [inline]
 __se_sys_openat fs/open.c:1337 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1337
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Last potentially related work creation:
 kasan_save_stack+0x2b/0x50 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:481
 call_rcu+0x163/0x9c0 kernel/rcu/tree.c:2798
 proc_invalidate_siblings_dcache+0x418/0x630 fs/proc/inode.c:158
 release_task+0x1537/0x1810 kernel/exit.c:231
 wait_task_zombie kernel/exit.c:1136 [inline]
 wait_consider_task+0x191a/0x2c80 kernel/exit.c:1363
 do_wait_thread kernel/exit.c:1426 [inline]
 do_wait+0x291/0x9d0 kernel/exit.c:1543
 kernel_wait4+0x28b/0x3c0 kernel/exit.c:1706
 __do_sys_wait4 kernel/exit.c:1734 [inline]
 __se_sys_wait4 kernel/exit.c:1730 [inline]
 __x64_sys_wait4+0x117/0x1c0 kernel/exit.c:1730
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Second to last potentially related work creation:
 kasan_save_stack+0x2b/0x50 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:481
 call_rcu+0x163/0x9c0 kernel/rcu/tree.c:2798
 proc_invalidate_siblings_dcache+0x418/0x630 fs/proc/inode.c:158
 release_task+0x1537/0x1810 kernel/exit.c:231
 wait_task_zombie kernel/exit.c:1136 [inline]
 wait_consider_task+0x191a/0x2c80 kernel/exit.c:1363
 do_wait_thread kernel/exit.c:1426 [inline]
 do_wait+0x291/0x9d0 kernel/exit.c:1543
 kernel_wait4+0x28b/0x3c0 kernel/exit.c:1706
 __do_sys_wait4 kernel/exit.c:1734 [inline]
 __se_sys_wait4 kernel/exit.c:1730 [inline]
 __x64_sys_wait4+0x117/0x1c0 kernel/exit.c:1730
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff88802fe87590
 which belongs to the cache proc_inode_cache of size 1240
The buggy address is located 1424 bytes to the right of
 1240-byte region [ffff88802fe87590, ffff88802fe87a68)

The buggy address belongs to the physical page:
page:ffffea0000bfa000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2fe80
head:ffffea0000bfa000 order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff888017db7101
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 dead000000000100 dead000000000122 ffff8881400f5500
raw: 0000000000000000 0000000080170017 00000001ffffffff ffff888017db7101
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d20d0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 3854, tgid 3852 (syz-executor.4), ts 109225736199, free_ts 0
 prep_new_page mm/page_alloc.c:2539 [inline]
 get_page_from_freelist+0x742/0x7c0 mm/page_alloc.c:4288
 __alloc_pages+0x259/0x560 mm/page_alloc.c:5555
 alloc_slab_page+0x70/0xf0 mm/slub.c:1794
 allocate_slab+0x5e/0x4b0 mm/slub.c:1939
 new_slab mm/slub.c:1992 [inline]
 ___slab_alloc+0x782/0xe20 mm/slub.c:3180
 __slab_alloc mm/slub.c:3279 [inline]
 slab_alloc_node mm/slub.c:3364 [inline]
 slab_alloc mm/slub.c:3406 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3413 [inline]
 kmem_cache_alloc_lru+0x233/0x2e0 mm/slub.c:3429
 alloc_inode_sb include/linux/fs.h:3117 [inline]
 proc_alloc_inode+0x23/0xb0 fs/proc/inode.c:67
 alloc_inode fs/inode.c:259 [inline]
 new_inode_pseudo+0x61/0x1d0 fs/inode.c:1018
 new_inode+0x25/0x1d0 fs/inode.c:1046
 proc_get_inode+0x1e/0x6d0 fs/proc/inode.c:654
 proc_lookup_de+0x261/0x310 fs/proc/generic.c:254
 lookup_open fs/namei.c:3391 [inline]
 open_last_lookups fs/namei.c:3481 [inline]
 path_openat+0x10e6/0x2df0 fs/namei.c:3710
 do_filp_open+0x264/0x4f0 fs/namei.c:3740
 do_sys_openat2+0x124/0x4e0 fs/open.c:1310
 do_sys_open fs/open.c:1326 [inline]
 __do_sys_openat fs/open.c:1342 [inline]
 __se_sys_openat fs/open.c:1337 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1337
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88802fe87e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88802fe87f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88802fe87f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                                ^
 ffff88802fe88000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88802fe88080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================