==================================================================
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+0x48/0x60 kernel/locking/spinlock.c:154
Read of size 1 at addr ffff0000c5ce89e0 by task syz.1.244/8395

CPU: 1 UID: 0 PID: 8395 Comm: syz.1.244 Not tainted 6.16.0-rc2-syzkaller-g9aa9b43d689e #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:501 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 print_address_description+0xa8/0x254 mm/kasan/report.c:408
 print_report+0x68/0x84 mm/kasan/report.c:521
 kasan_report+0xb0/0x110 mm/kasan/report.c:634
 __kasan_check_byte+0x3c/0x54 mm/kasan/common.c:557
 kasan_check_byte include/linux/kasan.h:399 [inline]
 lock_acquire+0xb0/0x2e0 kernel/locking/lockdep.c:5845
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x48/0x60 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+0x1d0/0x424 kernel/futex/core.c:251
 futex_hash_allocate+0x8b0/0x9c4 kernel/futex/core.c:1662
 futex_hash_prctl+0xe4/0x5a0 kernel/futex/core.c:1757
 __do_sys_prctl kernel/sys.c:2825 [inline]
 __se_sys_prctl kernel/sys.c:2474 [inline]
 __arm64_sys_prctl+0x218/0x1510 kernel/sys.c:2474
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767
 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600

Allocated by task 8392:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x40/0x78 mm/kasan/common.c:68
 kasan_save_alloc_info+0x44/0x54 mm/kasan/generic.c:562
 poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
 __kasan_kmalloc+0x9c/0xb4 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __do_kmalloc_node mm/slub.c:4328 [inline]
 __kvmalloc_node_noprof+0x38c/0x638 mm/slub.c:5015
 futex_hash_allocate+0x37c/0x9c4 kernel/futex/core.c:1601
 futex_hash_prctl+0xe4/0x5a0 kernel/futex/core.c:1757
 __do_sys_prctl kernel/sys.c:2825 [inline]
 __se_sys_prctl kernel/sys.c:2474 [inline]
 __arm64_sys_prctl+0x218/0x1510 kernel/sys.c:2474
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767
 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600

The buggy address belongs to the object at ffff0000c5ce8980
 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 [ffff0000c5ce8980, ffff0000c5ce89c0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105ce8
memcg:ffff0000cdd0d001
flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 05ffc00000000000 ffff0000c0009c80 dead000000000100 dead000000000122
raw: 0000000000000000 0000000080200020 00000000f5000000 ffff0000cdd0d001
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000c5ce8880: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff0000c5ce8900: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc
>ffff0000c5ce8980: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
                                                       ^
 ffff0000c5ce8a00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff0000c5ce8a80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
==================================================================
Unable to handle kernel paging request at virtual address e0a8405f8000032d
KASAN: maybe wild-memory-access in range [0x054602fc00001968-0x054602fc0000196f]
Mem abort info:
  ESR = 0x0000000096000004
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x04: level 0 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
  CM = 0, WnR = 0, TnD = 0, TagAccess = 0
  GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[e0a8405f8000032d] address between user and kernel address ranges
Internal error: Oops: 0000000096000004 [#1]  SMP
Modules linked in:
CPU: 1 UID: 0 PID: 8395 Comm: syz.1.244 Tainted: G    B               6.16.0-rc2-syzkaller-g9aa9b43d689e #0 PREEMPT 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : futex_rehash_private kernel/futex/core.c:214 [inline]
pc : __futex_pivot_hash+0x1fc/0x424 kernel/futex/core.c:251
lr : futex_rehash_private kernel/futex/core.c:214 [inline]
lr : __futex_pivot_hash+0x1e8/0x424 kernel/futex/core.c:251
sp : ffff80009c947ab0
x29: ffff80009c947ae0 x28: dfff800000000000 x27: ffff700013928f70
x26: 054602fc0000196e x25: ffff0000d552dcd8 x24: ffff0000c5ce8a08
x23: ffff0000c5ce89c0 x22: ffff0000c5ce89c8 x21: 000000003fffffff
x20: dfff800000000000 x19: 0000000000000000 x18: 0000000000000000
x17: 0000000000000000 x16: ffff80008052b6cc x15: ffff700013928f3c
x14: 1ffff00013928f3c x13: 0000000000000004 x12: ffffffffffffffff
x11: ffff700013928f3c x10: dfff800000000000 x9 : ffff8000973bd7a0
x8 : 00a8c05f8000032d x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff80009c947238 x4 : ffff80008f727060 x3 : ffff80008066a6fc
x2 : 0000000000000000 x1 : 0000000000000008 x0 : 0000000000000000
Call trace:
 futex_rehash_private kernel/futex/core.c:214 [inline] (P)
 __futex_pivot_hash+0x1fc/0x424 kernel/futex/core.c:251 (P)
 futex_hash_allocate+0x8b0/0x9c4 kernel/futex/core.c:1662
 futex_hash_prctl+0xe4/0x5a0 kernel/futex/core.c:1757
 __do_sys_prctl kernel/sys.c:2825 [inline]
 __se_sys_prctl kernel/sys.c:2474 [inline]
 __arm64_sys_prctl+0x218/0x1510 kernel/sys.c:2474
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767
 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
Code: eb18035f 54000a40 f81f03b3 d343ff48 (38746908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	eb18035f 	cmp	x26, x24
   4:	54000a40 	b.eq	0x14c  // b.none
   8:	f81f03b3 	stur	x19, [x29, #-16]
   c:	d343ff48 	lsr	x8, x26, #3
* 10:	38746908 	ldrb	w8, [x8, x20] <-- trapping instruction