==================================================================
BUG: KASAN: slab-out-of-bounds in __bpf_get_stackid+0x6bf/0x900 kernel/bpf/stackmap.c:271
Write of size 64 at addr ffff8880787ea290 by task syz.3.309/6855

CPU: 1 PID: 6855 Comm: syz.3.309 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
 <IRQ>
 dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:364 [inline]
 print_report+0xa8/0x210 mm/kasan/report.c:468
 kasan_report+0x117/0x150 mm/kasan/report.c:581
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x241/0x290 mm/kasan/generic.c:187
 __asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106
 __bpf_get_stackid+0x6bf/0x900 kernel/bpf/stackmap.c:271
 ____bpf_get_stackid_pe kernel/bpf/stackmap.c:362 [inline]
 bpf_get_stackid_pe+0x343/0x410 kernel/bpf/stackmap.c:331
 bpf_prog_59708bf94c5c958b+0x30/0x48
 bpf_dispatcher_nop_func include/linux/bpf.h:1224 [inline]
 __bpf_prog_run include/linux/filter.h:616 [inline]
 bpf_prog_run include/linux/filter.h:623 [inline]
 bpf_overflow_handler+0x1fc/0x510 kernel/events/core.c:10584
 __perf_event_overflow+0x447/0x630 kernel/events/core.c:9720
 perf_event_overflow kernel/events/core.c:9741 [inline]
 perf_swevent_hrtimer+0x439/0x610 kernel/events/core.c:11230
 __run_hrtimer kernel/time/hrtimer.c:1750 [inline]
 __hrtimer_run_queues+0x4e1/0xc40 kernel/time/hrtimer.c:1814
 hrtimer_interrupt+0x3c9/0x9c0 kernel/time/hrtimer.c:1876
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1077 [inline]
 __sysvec_apic_timer_interrupt+0xfb/0x3b0 arch/x86/kernel/apic/apic.c:1094
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:check_region_inline mm/kasan/generic.c:169 [inline]
RIP: 0010:kasan_check_range+0x12/0x290 mm/kasan/generic.c:187
Code: 0f 0b b8 ea ff ff ff c3 0f 0b b8 ea ff ff ff c3 cc cc cc cc cc cc cc cc 66 0f 1f 00 b0 01 48 85 f6 0f 84 b4 01 00 00 55 41 57 <41> 56 41 55 41 54 53 4c 8d 04 37 49 39 f8 0f 82 13 02 00 00 49 89
RSP: 0018:ffffc90005477be8 EFLAGS: 00000206
RAX: ffffffff817bc501 RBX: 0000000000000018 RCX: ffffffff817bc53d
RDX: 0000000000000001 RSI: 0000000000000018 RDI: ffffc90005477c80
RBP: 0000000000000000 R08: ffff888078478000 R09: 000000000000000d
R10: 000000000000000d R11: 0000000000000000 R12: 0000000000000000
R13: 00007fea99215fac R14: ffffc90005477c80 R15: 1ffff92000a8ef8c
 __asan_memset+0x22/0x40 mm/kasan/shadow.c:84
 futex_wake+0xad/0x4f0 kernel/futex/waitwake.c:147
 do_futex+0x35d/0x3e0 kernel/futex/syscalls.c:139
 __do_sys_futex kernel/futex/syscalls.c:211 [inline]
 __se_sys_futex+0x3a9/0x440 kernel/futex/syscalls.c:192
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fea98f9cdd9
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:00007fea99e790e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007fea99215fa8 RCX: 00007fea98f9cdd9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fea99215fac
RBP: 00007fea99215fa0 R08: 0000000000745d1e R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fea99216038 R14: 00007ffef02d9ef0 R15: 00007ffef02d9fd8
 </TASK>

Allocated by task 6855:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
 ____kasan_kmalloc mm/kasan/common.c:375 [inline]
 __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:384
 kasan_kmalloc include/linux/kasan.h:198 [inline]
 __do_kmalloc_node mm/slab_common.c:1007 [inline]
 __kmalloc_node+0xb4/0x230 mm/slab_common.c:1014
 kmalloc_node include/linux/slab.h:620 [inline]
 __bpf_map_area_alloc kernel/bpf/syscall.c:303 [inline]
 bpf_map_area_alloc+0x5e/0x110 kernel/bpf/syscall.c:316
 prealloc_elems_and_freelist+0x86/0x1c0 kernel/bpf/stackmap.c:51
 stack_map_alloc+0x33a/0x4c0 kernel/bpf/stackmap.c:114
 map_create+0x877/0x12f0 kernel/bpf/syscall.c:1247
 __sys_bpf+0x651/0x890 kernel/bpf/syscall.c:5459
 __do_sys_bpf kernel/bpf/syscall.c:5581 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5579 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5579
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Last potentially related work creation:
 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:46
 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:492
 __call_rcu_common kernel/rcu/tree.c:2721 [inline]
 call_rcu+0x153/0x950 kernel/rcu/tree.c:2837
 nf_unregister_net_hook net/netfilter/core.c:-1 [inline]
 nf_unregister_net_hooks+0xcb/0x130 net/netfilter/core.c:613
 nf_ct_netns_do_put net/netfilter/nf_conntrack_proto.c:543 [inline]
 nf_ct_netns_put+0x36d/0x520 net/netfilter/nf_conntrack_proto.c:-1
 nf_conncount_destroy+0x41/0x150 net/netfilter/nf_conncount.c:688
 ovs_ct_limit_exit net/openvswitch/conntrack.c:1597 [inline]
 ovs_ct_exit+0x9c/0x200 net/openvswitch/conntrack.c:2000
 ovs_exit_net+0xed/0x7a0 net/openvswitch/datapath.c:2686
 ops_exit_list net/core/net_namespace.c:173 [inline]
 setup_net+0x7e7/0xa30 net/core/net_namespace.c:375
 copy_net_ns+0x36d/0x5e0 net/core/net_namespace.c:520
 create_new_namespaces+0x3d3/0x6f0 kernel/nsproxy.c:110
 copy_namespaces+0x430/0x4a0 kernel/nsproxy.c:179
 copy_process+0x1724/0x3d80 kernel/fork.c:2510
 kernel_clone+0x24b/0x8a0 kernel/fork.c:2915
 __do_sys_clone kernel/fork.c:3058 [inline]
 __se_sys_clone kernel/fork.c:3042 [inline]
 __x64_sys_clone+0x1b7/0x230 kernel/fork.c:3042
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Second to last potentially related work creation:
 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:46
 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:492
 __call_rcu_common kernel/rcu/tree.c:2721 [inline]
 call_rcu+0x153/0x950 kernel/rcu/tree.c:2837
 nf_hook_entries_free net/netfilter/core.c:88 [inline]
 __nf_register_net_hook+0x788/0x910 net/netfilter/core.c:457
 nf_register_net_hook+0xb2/0x190 net/netfilter/core.c:578
 nf_register_net_hooks+0x44/0x1b0 net/netfilter/core.c:594
 ipt_register_table+0x53d/0x7d0 net/ipv4/netfilter/ip_tables.c:1781
 iptable_mangle_table_init+0x41/0x60 net/ipv4/netfilter/iptable_mangle.c:91
 xt_find_table_lock+0x306/0x3e0 net/netfilter/x_tables.c:1282
 xt_request_find_table_lock+0x26/0x100 net/netfilter/x_tables.c:1307
 get_info net/ipv4/netfilter/ip_tables.c:963 [inline]
 do_ipt_get_ctl+0x717/0x1200 net/ipv4/netfilter/ip_tables.c:1659
 nf_getsockopt+0x262/0x280 net/netfilter/nf_sockopt.c:116
 ip_getsockopt+0x19f/0x230 net/ipv4/ip_sockglue.c:1790
 do_sock_getsockopt+0x379/0x450 net/socket.c:2383
 __sys_getsockopt net/socket.c:2412 [inline]
 __do_sys_getsockopt net/socket.c:2422 [inline]
 __se_sys_getsockopt net/socket.c:2419 [inline]
 __x64_sys_getsockopt+0x1d6/0x280 net/socket.c:2419
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

The buggy address belongs to the object at ffff8880787ea280
 which belongs to the cache kmalloc-cg-64 of size 64
The buggy address is located 16 bytes inside of
 allocated 40-byte region [ffff8880787ea280, ffff8880787ea2a8)

The buggy address belongs to the physical page:
page:ffffea0001e1fa80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x787ea
memcg:ffff88801e332201
flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000800 ffff888017c4da00 ffffea0001724c40 0000000000000002
raw: 0000000000000000 0000000080200020 00000001ffffffff ffff88801e332201
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 5771, tgid 5771 (syz-executor), ts 92286598852, free_ts 92286052285
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1c1/0x200 mm/page_alloc.c:1581
 prep_new_page mm/page_alloc.c:1588 [inline]
 get_page_from_freelist+0x1951/0x19e0 mm/page_alloc.c:3220
 __alloc_pages+0x1f0/0x460 mm/page_alloc.c:4500
 alloc_slab_page+0x5d/0x160 mm/slub.c:1881
 allocate_slab mm/slub.c:2028 [inline]
 new_slab+0x87/0x2d0 mm/slub.c:2081
 ___slab_alloc+0xc5d/0x12f0 mm/slub.c:3253
 __slab_alloc mm/slub.c:3339 [inline]
 __slab_alloc_node mm/slub.c:3392 [inline]
 slab_alloc_node mm/slub.c:3485 [inline]
 __kmem_cache_alloc_node+0x19e/0x250 mm/slub.c:3534
 kmalloc_trace+0x2a/0xe0 mm/slab_common.c:1098
 kmalloc include/linux/slab.h:600 [inline]
 alloc_fdtable+0xca/0x2c0 fs/file.c:147
 dup_fd+0x786/0xa50 fs/file.c:346
 copy_files+0xc3/0x120 kernel/fork.c:1795
 copy_process+0x15ab/0x3d80 kernel/fork.c:2495
 kernel_clone+0x24b/0x8a0 kernel/fork.c:2915
 __do_sys_clone kernel/fork.c:3058 [inline]
 __se_sys_clone kernel/fork.c:3042 [inline]
 __x64_sys_clone+0x1b7/0x230 kernel/fork.c:3042
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1181 [inline]
 free_unref_page_prepare+0x7b2/0x8c0 mm/page_alloc.c:2365
 free_unref_page+0x32/0x2e0 mm/page_alloc.c:2458
 vfree+0x1a6/0x320 mm/vmalloc.c:2868
 __do_replace+0x858/0x990 net/ipv6/netfilter/ip6_tables.c:1107
 do_replace net/ipv6/netfilter/ip6_tables.c:1158 [inline]
 do_ip6t_set_ctl+0xb48/0xe10 net/ipv6/netfilter/ip6_tables.c:1644
 nf_setsockopt+0x263/0x280 net/netfilter/nf_sockopt.c:101
 do_sock_setsockopt+0x175/0x1a0 net/socket.c:2321
 __sys_setsockopt net/socket.c:2344 [inline]
 __do_sys_setsockopt net/socket.c:2353 [inline]
 __se_sys_setsockopt net/socket.c:2350 [inline]
 __x64_sys_setsockopt+0x182/0x200 net/socket.c:2350
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Memory state around the buggy address:
 ffff8880787ea180: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc
 ffff8880787ea200: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc
>ffff8880787ea280: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc
                                  ^
 ffff8880787ea300: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc
 ffff8880787ea380: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc
==================================================================
----------------
Code disassembly (best guess):
   0:	0f 0b                	ud2
   2:	b8 ea ff ff ff       	mov    $0xffffffea,%eax
   7:	c3                   	ret
   8:	0f 0b                	ud2
   a:	b8 ea ff ff ff       	mov    $0xffffffea,%eax
   f:	c3                   	ret
  10:	cc                   	int3
  11:	cc                   	int3
  12:	cc                   	int3
  13:	cc                   	int3
  14:	cc                   	int3
  15:	cc                   	int3
  16:	cc                   	int3
  17:	cc                   	int3
  18:	66 0f 1f 00          	nopw   (%rax)
  1c:	b0 01                	mov    $0x1,%al
  1e:	48 85 f6             	test   %rsi,%rsi
  21:	0f 84 b4 01 00 00    	je     0x1db
  27:	55                   	push   %rbp
  28:	41 57                	push   %r15
* 2a:	41 56                	push   %r14 <-- trapping instruction
  2c:	41 55                	push   %r13
  2e:	41 54                	push   %r12
  30:	53                   	push   %rbx
  31:	4c 8d 04 37          	lea    (%rdi,%rsi,1),%r8
  35:	49 39 f8             	cmp    %rdi,%r8
  38:	0f 82 13 02 00 00    	jb     0x251
  3e:	49                   	rex.WB
  3f:	89                   	.byte 0x89