==================================================================
BUG: KASAN: slab-out-of-bounds in __bpf_get_stackid+0x6fa/0x960 kernel/bpf/stackmap.c:274
Write of size 88 at addr ffff888108f8c910 by task syz.1.980/3908

CPU: 1 PID: 3908 Comm: syz.1.980 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Call Trace:
 <IRQ>
 __dump_stack+0x21/0x24 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
 print_address_description+0x71/0x200 mm/kasan/report.c:316
 print_report+0x4a/0x60 mm/kasan/report.c:420
 kasan_report+0x122/0x150 mm/kasan/report.c:524
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x249/0x2a0 mm/kasan/generic.c:189
 memcpy+0x44/0x70 mm/kasan/shadow.c:66
 __bpf_get_stackid+0x6fa/0x960 kernel/bpf/stackmap.c:274
 ____bpf_get_stackid_pe kernel/bpf/stackmap.c:365 [inline]
 bpf_get_stackid_pe+0x2ee/0x400 kernel/bpf/stackmap.c:334
 bpf_prog_ceda4e53fcf21ae1+0x28/0x40
 bpf_dispatcher_nop_func include/linux/bpf.h:987 [inline]
 __bpf_prog_run include/linux/filter.h:607 [inline]
 bpf_prog_run include/linux/filter.h:614 [inline]
 bpf_overflow_handler+0x3d0/0x5e0 kernel/events/core.c:10238
 __perf_event_overflow+0x437/0x620 kernel/events/core.c:9448
 perf_swevent_hrtimer+0x400/0x5b0 kernel/events/core.c:10879
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x3bb/0x8e0 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x3c7/0x8c0 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
 __sysvec_apic_timer_interrupt+0x11e/0x440 arch/x86/kernel/apic/apic.c:1124
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:should_fail_ex+0x156/0x520 lib/fault-inject.c:108
Code: 3c 24 eb 4b 65 4c 8b 25 98 75 76 7d 49 81 c4 0c 0b 00 00 4c 89 e3 48 c1 eb 03 0f b6 04 13 84 c0 0f 85 a8 02 00 00 45 8b 2c 24 <45> 85 ed 0f 84 d7 fe ff ff 41 ff cd 0f b6 04 13 84 c0 0f 85 ce 02
RSP: 0018:ffffc90000a879f8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff11023771671 RCX: ffff88811bb8a880
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff871ce040
RBP: ffffc90000a87a40 R08: ffffc90000a87bf7 R09: ffffc90000a87be0
R10: dffffc0000000000 R11: fffff52000150f7f R12: ffff88811bb8b38c
R13: 0000000000000000 R14: ffffffff871ce040 R15: 0000000000000001
 should_fail+0xb/0x10 lib/fault-inject.c:157
 should_fail_futex kernel/futex/core.c:83 [inline]
 get_futex_key+0x143/0xb10 kernel/futex/core.c:241
 futex_wake+0x150/0x8e0 kernel/futex/waitwake.c:156
 do_futex+0x2bf/0x430 kernel/futex/syscalls.c:141
 __do_sys_futex kernel/futex/syscalls.c:213 [inline]
 __se_sys_futex+0x136/0x310 kernel/futex/syscalls.c:194
 __x64_sys_futex+0xe5/0x100 kernel/futex/syscalls.c:194
 x64_sys_call+0x7ec/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:203
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f55ee39c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f55ecdf70e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f55ee615fa8 RCX: 00007f55ee39c819
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f55ee615fac
RBP: 00007f55ee615fa0 R08: 00053bf2f18a724a R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f55ee616038 R14: 00007fff23a97a40 R15: 00007fff23a97b28
 </TASK>

Allocated by task 3908:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
 kasan_save_alloc_info+0x25/0x30 mm/kasan/generic.c:505
 ____kasan_kmalloc mm/kasan/common.c:380 [inline]
 __kasan_kmalloc+0x95/0xb0 mm/kasan/common.c:389
 kasan_kmalloc include/linux/kasan.h:212 [inline]
 __do_kmalloc_node mm/slab_common.c:938 [inline]
 __kmalloc_node+0xb2/0x1e0 mm/slab_common.c:945
 kmalloc_node include/linux/slab.h:589 [inline]
 __bpf_map_area_alloc kernel/bpf/syscall.c:328 [inline]
 bpf_map_area_alloc+0x4b/0xe0 kernel/bpf/syscall.c:341
 prealloc_elems_and_freelist+0x8a/0x1e0 kernel/bpf/stackmap.c:51
 stack_map_alloc+0x3a7/0x530 kernel/bpf/stackmap.c:117
 find_and_alloc_map kernel/bpf/syscall.c:133 [inline]
 map_create+0x49c/0xd80 kernel/bpf/syscall.c:1126
 __sys_bpf+0x34e/0x850 kernel/bpf/syscall.c:4987
 __do_sys_bpf kernel/bpf/syscall.c:5109 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5107 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5107
 x64_sys_call+0x488/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:322
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Last potentially related work creation:
 kasan_save_stack+0x3a/0x60 mm/kasan/common.c:46
 __kasan_record_aux_stack+0xb6/0xc0 mm/kasan/generic.c:486
 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496
 kvfree_call_rcu+0x8b/0x7c0 kernel/rcu/tree.c:3445
 ip6addrlbl_net_exit+0x12d/0x1a0 net/ipv6/addrlabel.c:347
 ops_exit_list net/core/net_namespace.c:172 [inline]
 cleanup_net+0x5b5/0xb10 net/core/net_namespace.c:604
 process_one_work+0x71f/0xc40 kernel/workqueue.c:2302
 worker_thread+0xa29/0x11e0 kernel/workqueue.c:2449
 kthread+0x281/0x320 kernel/kthread.c:386
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

The buggy address belongs to the object at ffff888108f8c900
 which belongs to the cache kmalloc-64 of size 64
The buggy address is located 16 bytes inside of
 64-byte region [ffff888108f8c900, ffff888108f8c940)

The buggy address belongs to the physical page:
page:ffffea000423e300 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x108f8c
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 ffffea0004401540 dead000000000003 ffff888100042780
raw: 0000000000000000 0000000000200020 00000001ffffffff 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 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 1, tgid 1 (swapper/0), ts 1479178007, free_ts 0
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1f5/0x210 mm/page_alloc.c:2670
 prep_new_page+0x1c/0x110 mm/page_alloc.c:2677
 get_page_from_freelist+0x2d12/0x2d80 mm/page_alloc.c:4583
 __alloc_pages+0x1fa/0x610 mm/page_alloc.c:5924
 alloc_slab_page+0x6e/0xf0 include/linux/gfp.h:-1
 allocate_slab mm/slub.c:1967 [inline]
 new_slab+0x98/0x3d0 mm/slub.c:2020
 ___slab_alloc+0x6bd/0xb20 mm/slub.c:3177
 __slab_alloc+0x5e/0xa0 mm/slub.c:3263
 slab_alloc_node mm/slub.c:3348 [inline]
 __kmem_cache_alloc_node+0x203/0x2c0 mm/slub.c:3423
 kmalloc_trace+0x29/0xb0 mm/slab_common.c:1028
 kmalloc include/linux/slab.h:563 [inline]
 kzalloc include/linux/slab.h:699 [inline]
 add_sysfs_param+0x4d6/0x830 kernel/params.c:638
 kernel_add_sysfs_param+0xb3/0x12a kernel/params.c:812
 param_sysfs_builtin+0x20d/0x2ae kernel/params.c:851
 param_sysfs_init+0x6a/0x6f kernel/params.c:972
 do_one_initcall+0x1d6/0x580 init/main.c:1405
 do_initcall_level+0x16f/0x2d0 init/main.c:1478
page_owner free stack trace missing

Memory state around the buggy address:
 ffff888108f8c800: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc
 ffff888108f8c880: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff888108f8c900: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc
                                  ^
 ffff888108f8c980: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff888108f8ca00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc
==================================================================
----------------
Code disassembly (best guess):
   0:	3c 24                	cmp    $0x24,%al
   2:	eb 4b                	jmp    0x4f
   4:	65 4c 8b 25 98 75 76 	mov    %gs:0x7d767598(%rip),%r12        # 0x7d7675a4
   b:	7d
   c:	49 81 c4 0c 0b 00 00 	add    $0xb0c,%r12
  13:	4c 89 e3             	mov    %r12,%rbx
  16:	48 c1 eb 03          	shr    $0x3,%rbx
  1a:	0f b6 04 13          	movzbl (%rbx,%rdx,1),%eax
  1e:	84 c0                	test   %al,%al
  20:	0f 85 a8 02 00 00    	jne    0x2ce
  26:	45 8b 2c 24          	mov    (%r12),%r13d
* 2a:	45 85 ed             	test   %r13d,%r13d <-- trapping instruction
  2d:	0f 84 d7 fe ff ff    	je     0xffffff0a
  33:	41 ff cd             	dec    %r13d
  36:	0f b6 04 13          	movzbl (%rbx,%rdx,1),%eax
  3a:	84 c0                	test   %al,%al
  3c:	0f                   	.byte 0xf
  3d:	85 ce                	test   %ecx,%esi
  3f:	02                   	.byte 0x2