==================================================================
BUG: KASAN: slab-out-of-bounds in __bpf_get_stackid+0x6fa/0x960 kernel/bpf/stackmap.c:274
Write of size 64 at addr ffff888118bd9d90 by task syz.0.248/1316

CPU: 0 PID: 1316 Comm: syz.0.248 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
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_d7a3c042c8d3a366+0x21/0x31
 bpf_dispatcher_nop_func include/linux/bpf.h:987 [inline]
 __bpf_prog_run include/linux/filter.h:596 [inline]
 bpf_prog_run include/linux/filter.h:614 [inline]
 bpf_overflow_handler+0x521/0x5e0 kernel/events/core.c:10273
 __perf_event_overflow+0x458/0x640 kernel/events/core.c:9448
 perf_event_overflow kernel/events/core.c:9469 [inline]
 perf_swevent_hrtimer+0x4b4/0x540 kernel/events/core.c:10919
 __run_hrtimer kernel/time/hrtimer.c:1689 [inline]
 __hrtimer_run_queues+0x398/0x8a0 kernel/time/hrtimer.c:1753
 hrtimer_interrupt+0x3ad/0x8c0 kernel/time/hrtimer.c:1815
 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:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__mutex_unlock_fast kernel/locking/mutex.c:186 [inline]
RIP: 0010:mutex_unlock+0x6b/0x230 kernel/locking/mutex.c:560
Code: 08 93 e1 5d 86 48 c7 44 24 10 e0 44 00 85 49 89 e5 49 c1 ed 03 48 b8 f1 f1 f1 f1 f8 f3 f3 f3 4b 89 44 25 00 43 c6 44 25 04 00 <65> 48 8b 1d 6d 28 02 7b 48 89 5c 24 20 be 08 00 00 00 e8 2e b7 b6
RSP: 0018:ffffc900101a7b40 EFLAGS: 00000a02
RAX: f3f3f3f8f1f1f1f1 RBX: ffff88811b456000 RCX: 0000000000080000
RDX: ffffc9000225d000 RSI: 0000000000000029 RDI: ffff88811b456010
RBP: ffffc900101a7bd0 R08: ffff88811effbb3f R09: 1ffff11023dff767
R10: dffffc0000000000 R11: ffffed1023dff768 R12: dffffc0000000000
R13: 1ffff92002034f68 R14: ffff88811b456010 R15: ffffc900101a7b60
 perf_event_ctx_unlock kernel/events/core.c:1321 [inline]
 perf_ioctl+0x14a4/0x1e70 kernel/events/core.c:5838
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0x12f/0x1b0 fs/ioctl.c:856
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:856
 x64_sys_call+0x58b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17
 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: 0033:0x7faa0999e199
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:00007faa0a8ef028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007faa09c26180 RCX: 00007faa0999e199
RDX: 0000000000000006 RSI: 0000000040042408 RDI: 0000000000000007
RBP: 00007faa09a358e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007faa09c26218 R14: 00007faa09c26180 R15: 00007ffd1bec6558
 </TASK>

Allocated by task 1314:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
 kasan_save_alloc_info+0x1f/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+0x398/0x520 kernel/bpf/stackmap.c:117
 find_and_alloc_map kernel/bpf/syscall.c:133 [inline]
 map_create+0x467/0xcf0 kernel/bpf/syscall.c:1126
 __sys_bpf+0x34e/0x850 kernel/bpf/syscall.c:4988
 __do_sys_bpf kernel/bpf/syscall.c:5110 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5108 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5108
 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
 __call_rcu_common kernel/rcu/tree.c:2807 [inline]
 call_rcu+0xcf/0xf50 kernel/rcu/tree.c:2926
 nf_hook_entries_free net/netfilter/core.c:94 [inline]
 __nf_unregister_net_hook+0x486/0x610 net/netfilter/core.c:520
 nf_unregister_net_hook net/netfilter/core.c:-1 [inline]
 nf_unregister_net_hooks+0xe2/0x150 net/netfilter/core.c:607
 selinux_nf_unregister+0x21/0x30 security/selinux/hooks.c:7499
 ops_exit_list net/core/net_namespace.c:172 [inline]
 cleanup_net+0x5b0/0xb10 net/core/net_namespace.c:604
 process_one_work+0x717/0xc30 kernel/workqueue.c:2302
 worker_thread+0xa4d/0x11d0 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 ffff888118bd9d80
 which belongs to the cache kmalloc-64 of size 64
The buggy address is located 16 bytes inside of
 64-byte region [ffff888118bd9d80, ffff888118bd9dc0)

The buggy address belongs to the physical page:
page:ffffea000462f640 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x118bd9
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 0000000000000000 dead000000000001 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 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 288, tgid 288 (syz-executor), ts 36363260340, free_ts 36363142210
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1f5/0x210 mm/page_alloc.c:2673
 prep_new_page+0x1c/0x110 mm/page_alloc.c:2680
 get_page_from_freelist+0x2ca9/0x2d20 mm/page_alloc.c:4587
 __alloc_pages+0x1fa/0x610 mm/page_alloc.c:5931
 alloc_slab_page+0x6e/0xf0 include/linux/gfp.h:-1
 allocate_slab mm/slub.c:1967 [inline]
 new_slab+0x98/0x3e0 mm/slub.c:2020
 ___slab_alloc+0x70f/0xb70 mm/slub.c:3177
 __slab_alloc+0x5e/0xa0 mm/slub.c:3263
 slab_alloc_node mm/slub.c:3348 [inline]
 __kmem_cache_alloc_node+0x204/0x2d0 mm/slub.c:3423
 kmalloc_node_trace+0x26/0xb0 mm/slab_common.c:1041
 kmalloc_node include/linux/slab.h:585 [inline]
 kzalloc_node include/linux/slab.h:710 [inline]
 __get_vm_area_node+0x12c/0x360 mm/vmalloc.c:2515
 __vmalloc_node_range+0x326/0x1440 mm/vmalloc.c:3216
 __vmalloc_node mm/vmalloc.c:3321 [inline]
 vzalloc+0x78/0x90 mm/vmalloc.c:3394
 alloc_counters+0x66/0x530 net/ipv4/netfilter/arp_tables.c:672
 copy_entries_to_user net/ipv6/netfilter/ip6_tables.c:839 [inline]
 get_entries net/ipv6/netfilter/ip6_tables.c:1039 [inline]
 do_ip6t_get_ctl+0xa84/0x11b0 net/ipv6/netfilter/ip6_tables.c:1676
 nf_getsockopt+0x27f/0x2a0 net/netfilter/nf_sockopt.c:116
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1581 [inline]
 free_pcp_prepare mm/page_alloc.c:1655 [inline]
 free_unref_page_prepare+0x81b/0x820 mm/page_alloc.c:3622
 free_unref_page+0x93/0x530 mm/page_alloc.c:3720
 free_the_page mm/page_alloc.c:863 [inline]
 __free_pages+0x67/0x100 mm/page_alloc.c:6021
 __vunmap+0xa3c/0xc00 mm/vmalloc.c:2739
 __vfree mm/vmalloc.c:2788 [inline]
 vfree+0x61/0x90 mm/vmalloc.c:2819
 copy_entries_to_user net/ipv4/netfilter/ip_tables.c:866 [inline]
 get_entries net/ipv4/netfilter/ip_tables.c:1022 [inline]
 do_ipt_get_ctl+0xe78/0x1190 net/ipv4/netfilter/ip_tables.c:1667
 nf_getsockopt+0x27f/0x2a0 net/netfilter/nf_sockopt.c:116
 ip_getsockopt+0x157/0x1e0 net/ipv4/ip_sockglue.c:1826
 tcp_getsockopt+0xff/0x130 net/ipv4/tcp.c:4464
 sock_common_getsockopt+0xaa/0xc0 net/core/sock.c:3689
 __sys_getsockopt+0x215/0x490 net/socket.c:2322
 __do_sys_getsockopt net/socket.c:2337 [inline]
 __se_sys_getsockopt net/socket.c:2334 [inline]
 __x64_sys_getsockopt+0xbf/0xd0 net/socket.c:2334
 x64_sys_call+0x3d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:56
 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

Memory state around the buggy address:
 ffff888118bd9c80: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc
 ffff888118bd9d00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
>ffff888118bd9d80: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc
                                  ^
 ffff888118bd9e00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff888118bd9e80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
==================================================================
----------------
Code disassembly (best guess):
   0:	08 93 e1 5d 86 48    	or     %dl,0x48865de1(%rbx)
   6:	c7 44 24 10 e0 44 00 	movl   $0x850044e0,0x10(%rsp)
   d:	85
   e:	49 89 e5             	mov    %rsp,%r13
  11:	49 c1 ed 03          	shr    $0x3,%r13
  15:	48 b8 f1 f1 f1 f1 f8 	movabs $0xf3f3f3f8f1f1f1f1,%rax
  1c:	f3 f3 f3
  1f:	4b 89 44 25 00       	mov    %rax,0x0(%r13,%r12,1)
  24:	43 c6 44 25 04 00    	movb   $0x0,0x4(%r13,%r12,1)
* 2a:	65 48 8b 1d 6d 28 02 	mov    %gs:0x7b02286d(%rip),%rbx        # 0x7b02289f <-- trapping instruction
  31:	7b
  32:	48 89 5c 24 20       	mov    %rbx,0x20(%rsp)
  37:	be 08 00 00 00       	mov    $0x8,%esi
  3c:	e8                   	.byte 0xe8
  3d:	2e b7 b6             	cs mov $0xb6,%bh