==================================================================
BUG: KASAN: slab-out-of-bounds in __bpf_get_stackid+0x6fa/0x960 kernel/bpf/stackmap.c:274
Write of size 88 at addr ffff88812d43af10 by task syz.0.763/3054

CPU: 1 PID: 3054 Comm: syz.0.763 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_e6b925630670470c+0x21/0x34
 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+0x14a/0x520 lib/fault-inject.c:106
Code: 04 00 00 00 e8 f7 d5 2a ff f0 45 29 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
RSP: 0018:ffffc900009c79f8 EFLAGS: 00000a07
RAX: 0000000000000000 RBX: 1ffff1102423e8f9 RCX: ffff8881211f3cc0
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff871ce040
RBP: ffffc900009c7a40 R08: ffffc900009c7bf7 R09: ffffc900009c7be0
R10: dffffc0000000000 R11: fffff52000138f7f R12: ffff8881211f47cc
R13: dffffc0000000000 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: 0033:0x7fdb3b59c819
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:00007fdb3c39f0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007fdb3b815fa8 RCX: 00007fdb3b59c819
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fdb3b815fac
RBP: 00007fdb3b815fa0 R08: 001a9e638e17f952 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdb3b816038 R14: 00007ffd7d954d50 R15: 00007ffd7d954e38
 </TASK>

Allocated by task 3054:
 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

The buggy address belongs to the object at ffff88812d43af00
 which belongs to the cache kmalloc-64 of size 64
The buggy address is located 16 bytes inside of
 64-byte region [ffff88812d43af00, ffff88812d43af40)

The buggy address belongs to the physical page:
page:ffffea0004b50e80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12d43a
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 ffffea0004230400 dead000000000004 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 286, tgid 286 (syz-executor), ts 90639355793, free_ts 90639228530
 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_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+0x326/0x1430 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/ip_tables.c:801
 copy_entries_to_user net/ipv6/netfilter/ip6_tables.c:839 [inline]
 get_entries net/ipv6/netfilter/ip6_tables.c:1041 [inline]
 do_ip6t_get_ctl+0xa74/0x1190 net/ipv6/netfilter/ip6_tables.c:1679
 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:1578 [inline]
 free_pcp_prepare mm/page_alloc.c:1652 [inline]
 free_unref_page_prepare+0x742/0x750 mm/page_alloc.c:3618
 free_unref_page+0x95/0x540 mm/page_alloc.c:3716
 free_the_page mm/page_alloc.c:863 [inline]
 __free_pages+0x67/0x100 mm/page_alloc.c:6014
 __vunmap+0x9c0/0xb80 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:868 [inline]
 get_entries net/ipv4/netfilter/ip_tables.c:1024 [inline]
 do_ipt_get_ctl+0xe9c/0x1180 net/ipv4/netfilter/ip_tables.c:1670
 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:4462
 sock_common_getsockopt+0xaa/0xc0 net/core/sock.c:3680
 __sys_getsockopt+0x215/0x4a0 net/socket.c:2321
 __do_sys_getsockopt net/socket.c:2336 [inline]
 __se_sys_getsockopt net/socket.c:2333 [inline]
 __x64_sys_getsockopt+0xbf/0xd0 net/socket.c:2333
 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:
 ffff88812d43ae00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff88812d43ae80: 00 00 00 00 00 00 00 03 fc fc fc fc fc fc fc fc
>ffff88812d43af00: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc
                                  ^
 ffff88812d43af80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff88812d43b000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
----------------
Code disassembly (best guess):
   0:	04 00                	add    $0x0,%al
   2:	00 00                	add    %al,(%rax)
   4:	e8 f7 d5 2a ff       	call   0xff2ad600
   9:	f0 45 29 3c 24       	lock sub %r15d,(%r12)
   e:	eb 4b                	jmp    0x5b
  10:	65 4c 8b 25 98 75 76 	mov    %gs:0x7d767598(%rip),%r12        # 0x7d7675b0
  17:	7d
  18:	49 81 c4 0c 0b 00 00 	add    $0xb0c,%r12
  1f:	4c 89 e3             	mov    %r12,%rbx
  22:	48 c1 eb 03          	shr    $0x3,%rbx
  26:	0f b6 04 13          	movzbl (%rbx,%rdx,1),%eax
* 2a:	84 c0                	test   %al,%al <-- trapping instruction
  2c:	0f 85 a8 02 00 00    	jne    0x2da
  32:	45 8b 2c 24          	mov    (%r12),%r13d
  36:	45 85 ed             	test   %r13d,%r13d
  39:	0f 84 d7 fe ff ff    	je     0xffffff16
  3f:	41                   	rex.B