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BUG: KASAN: slab-out-of-bounds in __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
BUG: KASAN: slab-out-of-bounds in _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
Read of size 1 at addr ffff88806c9bf8e0 by task syz.3.1934/12790

CPU: 1 UID: 0 PID: 12790 Comm: syz.3.1934 Not tainted 6.16.0-rc2-syzkaller-00318-g739a6c93cc75 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:408 [inline]
 print_report+0xd2/0x2b0 mm/kasan/report.c:521
 kasan_report+0x118/0x150 mm/kasan/report.c:634
 __kasan_check_byte+0x2a/0x40 mm/kasan/common.c:557
 kasan_check_byte include/linux/kasan.h:399 [inline]
 lock_acquire+0x8d/0x360 kernel/locking/lockdep.c:5845
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:351 [inline]
 futex_rehash_private kernel/futex/core.c:213 [inline]
 __futex_pivot_hash+0x226/0x460 kernel/futex/core.c:251
 futex_hash_allocate+0xa6b/0xba0 kernel/futex/core.c:1662
 __do_sys_prctl kernel/sys.c:2825 [inline]
 __se_sys_prctl+0x9e8/0x1940 kernel/sys.c:2474
 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: 0033:0x7f59bd18e929
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:00007f59bdf22038 EFLAGS: 00000246 ORIG_RAX: 000000000000009d
RAX: ffffffffffffffda RBX: 00007f59bd3b6080 RCX: 00007f59bd18e929
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 000000000000004e
RBP: 00007f59bd210b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f59bd3b6080 R15: 00007ffe83afd408
 </TASK>

Allocated by task 12792:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
 __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __do_kmalloc_node mm/slub.c:4328 [inline]
 __kvmalloc_node_noprof+0x30d/0x5f0 mm/slub.c:5015
 futex_hash_allocate+0x3f4/0xba0 kernel/futex/core.c:1601
 __do_sys_prctl kernel/sys.c:2825 [inline]
 __se_sys_prctl+0x9e8/0x1940 kernel/sys.c:2474
 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 ffff88806c9bf880
 which belongs to the cache kmalloc-cg-64 of size 64
The buggy address is located 32 bytes to the right of
 allocated 64-byte region [ffff88806c9bf880, ffff88806c9bf8c0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6c9bf
memcg:ffff888064655001
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801a449c80 ffffea0001ab35c0 dead000000000002
raw: 0000000000000000 0000000080200020 00000000f5000000 ffff888064655001
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 5822, tgid 5822 (syz-executor), ts 97269960202, free_ts 97269136980
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1704
 prep_new_page mm/page_alloc.c:1712 [inline]
 get_page_from_freelist+0x21d5/0x22b0 mm/page_alloc.c:3669
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4959
 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2419
 alloc_slab_page mm/slub.c:2451 [inline]
 allocate_slab+0x8a/0x3b0 mm/slub.c:2619
 new_slab mm/slub.c:2673 [inline]
 ___slab_alloc+0xbfc/0x1480 mm/slub.c:3859
 __slab_alloc mm/slub.c:3949 [inline]
 __slab_alloc_node mm/slub.c:4024 [inline]
 slab_alloc_node mm/slub.c:4185 [inline]
 __do_kmalloc_node mm/slub.c:4327 [inline]
 __kvmalloc_node_noprof+0x429/0x5f0 mm/slub.c:5015
 simple_xattr_alloc+0x43/0xa0 fs/xattr.c:1238
 shmem_initxattrs+0x24d/0x4b0 mm/shmem.c:4260
 security_inode_init_security+0x29d/0x3f0 security/security.c:1852
 shmem_mknod+0x1f6/0x3e0 mm/shmem.c:3847
 shmem_mkdir+0x33/0x70 mm/shmem.c:3906
 vfs_mkdir+0x303/0x510 fs/namei.c:4375
 do_mkdirat+0x247/0x590 fs/namei.c:4408
 __do_sys_mkdirat fs/namei.c:4425 [inline]
 __se_sys_mkdirat fs/namei.c:4423 [inline]
 __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4423
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
page last free pid 5822 tgid 5822 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1248 [inline]
 __free_frozen_pages+0xc65/0xe60 mm/page_alloc.c:2706
 ___free_pages_bulk mm/kasan/shadow.c:332 [inline]
 __kasan_populate_vmalloc mm/kasan/shadow.c:375 [inline]
 kasan_populate_vmalloc+0x118/0x1a0 mm/kasan/shadow.c:417
 alloc_vmap_area+0xd51/0x1490 mm/vmalloc.c:2084
 __get_vm_area_node+0x1f8/0x300 mm/vmalloc.c:3179
 __vmalloc_node_range_noprof+0x301/0x12f0 mm/vmalloc.c:3845
 __vmalloc_node_noprof mm/vmalloc.c:3948 [inline]
 vzalloc_noprof+0xb2/0xf0 mm/vmalloc.c:4022
 alloc_counters+0xd3/0x6d0 net/ipv4/netfilter/ip_tables.c:799
 copy_entries_to_user net/ipv6/netfilter/ip6_tables.c:837 [inline]
 get_entries net/ipv6/netfilter/ip6_tables.c:1039 [inline]
 do_ip6t_get_ctl+0xa94/0x1180 net/ipv6/netfilter/ip6_tables.c:1677
 nf_getsockopt+0x26e/0x290 net/netfilter/nf_sockopt.c:116
 ipv6_getsockopt+0x1ed/0x290 net/ipv6/ipv6_sockglue.c:1493
 do_sock_getsockopt+0x360/0x650 net/socket.c:2357
 __sys_getsockopt net/socket.c:2386 [inline]
 __do_sys_getsockopt net/socket.c:2393 [inline]
 __se_sys_getsockopt net/socket.c:2390 [inline]
 __x64_sys_getsockopt+0x1a5/0x250 net/socket.c:2390
 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:
 ffff88806c9bf780: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff88806c9bf800: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff88806c9bf880: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
                                                       ^
 ffff88806c9bf900: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff88806c9bf980: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
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