==================================================================
BUG: KASAN: slab-out-of-bounds in __bpf_get_stackid+0x6fa/0x960 kernel/bpf/stackmap.c:274
Write of size 32 at addr ffff88813f961890 by task syz.2.1704/6409

CPU: 0 PID: 6409 Comm: syz.2.1704 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
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_63b2f832178674be+0x21/0x3a
 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+0x3c7/0x5e0 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:1685 [inline]
 __hrtimer_run_queues+0x398/0x890 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x3ad/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:__sanitizer_cov_trace_pc+0x1/0x60 kernel/kcov.c:209
Code: fb e8 23 00 00 00 48 8b 3d 1c 84 21 06 48 89 de e8 24 d2 44 00 5b 5d c3 00 90 90 90 90 90 90 90 90 90 90 90 b8 0c 67 40 a5 55 <48> 89 e5 48 8b 45 08 65 48 8b 0d 90 18 91 7e 65 8b 15 91 18 91 7e
RSP: 0018:ffffc90000e37ba0 EFLAGS: 00000246
RAX: 879987661af01b00 RBX: ffff88813143f800 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff88813143f800
RBP: ffffc90000e37bd0 R08: ffffc90000e37b67 R09: 1ffff920001c6f6c
R10: dffffc0000000000 R11: fffff520001c6f6d R12: 0000000040042408
R13: dffffc0000000000 R14: fffff520001c6f8c R15: 0000000000000000
 perf_event_ctx_unlock kernel/events/core.c:1322 [inline]
 perf_ioctl+0x14ac/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: 0033:0x7fde5599ce59
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:00007fde5682e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fde55c15fa0 RCX: 00007fde5599ce59
RDX: 0000000000000006 RSI: 0000000040042408 RDI: 0000000000000007
RBP: 00007fde55a32e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fde55c16038 R14: 00007fde55c15fa0 R15: 00007ffe8363f468
 </TASK>

Allocated by task 6409:
 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

The buggy address belongs to the object at ffff88813f961880
 which belongs to the cache kmalloc-64 of size 64
The buggy address is located 16 bytes inside of
 64-byte region [ffff88813f961880, ffff88813f9618c0)

The buggy address belongs to the physical page:
page:ffffea0004fe5840 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13f961
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 ffffea0004383300 dead000000000002 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 6093, tgid 6092 (syz.3.1614), ts 169005153910, free_ts 168982001861
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1f5/0x210 mm/page_alloc.c:2672
 prep_new_page+0x1c/0x110 mm/page_alloc.c:2679
 get_page_from_freelist+0x2ca9/0x2d20 mm/page_alloc.c:4586
 __alloc_pages+0x1fa/0x610 mm/page_alloc.c:5930
 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]
 vmalloc+0x78/0x90 mm/vmalloc.c:3354
 bpf_prog_calc_tag+0xf3/0x660 kernel/bpf/core.c:287
 resolve_pseudo_ldimm64+0xd0/0x1100 kernel/bpf/verifier.c:13031
 bpf_check+0x3861/0x10e90 kernel/bpf/verifier.c:15565
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1580 [inline]
 free_pcp_prepare mm/page_alloc.c:1654 [inline]
 free_unref_page_prepare+0x80c/0x820 mm/page_alloc.c:3621
 free_unref_page_list+0x117/0x8d0 mm/page_alloc.c:3772
 release_pages+0xc7e/0xce0 mm/swap.c:1053
 free_pages_and_swap_cache+0x86/0xa0 mm/swap_state.c:316
 tlb_batch_pages_flush mm/mmu_gather.c:59 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:254 [inline]
 tlb_flush_mmu mm/mmu_gather.c:261 [inline]
 tlb_finish_mmu+0x1b2/0x380 mm/mmu_gather.c:361
 exit_mmap+0x41d/0xc10 mm/mmap.c:3384
 __mmput+0x92/0x340 kernel/fork.c:1319
 mmput+0x4b/0x150 kernel/fork.c:1343
 copy_process+0x25fd/0x3500 kernel/fork.c:2752
 kernel_clone+0x22f/0x7f0 kernel/fork.c:2900
 __do_sys_clone kernel/fork.c:3043 [inline]
 __se_sys_clone kernel/fork.c:3027 [inline]
 __x64_sys_clone+0x193/0x200 kernel/fork.c:3027
 x64_sys_call+0x990/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:57
 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:
 ffff88813f961780: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff88813f961800: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff88813f961880: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc
                                  ^
 ffff88813f961900: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
 ffff88813f961980: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
==================================================================
----------------
Code disassembly (best guess):
   0:	fb                   	sti
   1:	e8 23 00 00 00       	call   0x29
   6:	48 8b 3d 1c 84 21 06 	mov    0x621841c(%rip),%rdi        # 0x6218429
   d:	48 89 de             	mov    %rbx,%rsi
  10:	e8 24 d2 44 00       	call   0x44d239
  15:	5b                   	pop    %rbx
  16:	5d                   	pop    %rbp
  17:	c3                   	ret
  18:	00 90 90 90 90 90    	add    %dl,-0x6f6f6f70(%rax)
  1e:	90                   	nop
  1f:	90                   	nop
  20:	90                   	nop
  21:	90                   	nop
  22:	90                   	nop
  23:	90                   	nop
  24:	b8 0c 67 40 a5       	mov    $0xa540670c,%eax
  29:	55                   	push   %rbp
* 2a:	48 89 e5             	mov    %rsp,%rbp <-- trapping instruction
  2d:	48 8b 45 08          	mov    0x8(%rbp),%rax
  31:	65 48 8b 0d 90 18 91 	mov    %gs:0x7e911890(%rip),%rcx        # 0x7e9118c9
  38:	7e
  39:	65 8b 15 91 18 91 7e 	mov    %gs:0x7e911891(%rip),%edx        # 0x7e9118d1