==================================================================
BUG: KASAN: slab-out-of-bounds in __bpf_get_stackid+0x868/0xcf0 kernel/bpf/stackmap.c:265
Write of size 8 at addr ffff88803019c258 by task syz.0.549/6604

CPU: 0 UID: 0 PID: 6604 Comm: syz.0.549 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <IRQ>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xca/0x240 mm/kasan/report.c:482
 kasan_report+0x118/0x150 mm/kasan/report.c:595
 __bpf_get_stackid+0x868/0xcf0 kernel/bpf/stackmap.c:265
 ____bpf_get_stackid_raw_tp kernel/trace/bpf_trace.c:1810 [inline]
 bpf_get_stackid_raw_tp+0x196/0x210 kernel/trace/bpf_trace.c:1799
 bpf_prog_b724608cae728045+0x27/0x2f
 bpf_dispatcher_nop_func include/linux/bpf.h:1335 [inline]
 __bpf_prog_run include/linux/filter.h:718 [inline]
 bpf_prog_run include/linux/filter.h:725 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2257 [inline]
 bpf_trace_run2+0x281/0x4b0 kernel/trace/bpf_trace.c:2298
 __do_trace_kfree include/trace/events/kmem.h:94 [inline]
 trace_kfree include/trace/events/kmem.h:94 [inline]
 kfree+0x3a0/0x440 mm/slub.c:4866
 slab_free_after_rcu_debug+0x60/0x2a0 mm/slub.c:4717
 rcu_do_batch kernel/rcu/tree.c:2605 [inline]
 rcu_core+0xcab/0x1770 kernel/rcu/tree.c:2861
 handle_softirqs+0x283/0x870 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:preempt_count_add+0x6/0x1a0 kernel/sched/core.c:5816
Code: 24 e8 de 25 93 00 eb 8c e9 f1 fe ff ff 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 <41> 56 53 49 bf 00 00 00 00 00 fc ff df 48 c7 c0 20 93 ab 99 48 c1
RSP: 0018:ffffc90003b6fab0 EFLAGS: 00000246
RAX: 1ffffffff1c31c88 RBX: ffffc90003b6fba0 RCX: ffffffff99ab9303
RDX: ffff88802e511e00 RSI: ffffffff8dba5d03 RDI: 0000000000000001
RBP: ffffc90003b6fc70 R08: ffffc90003b6fbe7 R09: 0000000000000000
R10: ffffc90003b6fbc0 R11: fffff5200076df7d R12: ffffffff8e18e3e0
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000
 __mutex_lock_common kernel/locking/mutex.c:597 [inline]
 __mutex_lock+0x15c/0x1360 kernel/locking/mutex.c:760
 tracepoint_probe_unregister+0x30/0x9b0 kernel/tracepoint.c:501
 bpf_raw_tp_link_release+0x43/0x70 kernel/bpf/syscall.c:3655
 bpf_link_free+0xed/0x330 kernel/bpf/syscall.c:3166
 bpf_link_put_direct kernel/bpf/syscall.c:3209 [inline]
 bpf_link_release+0x6b/0x80 kernel/bpf/syscall.c:3216
 __fput+0x449/0xa70 fs/file_table.c:468
 task_work_run+0x1d1/0x260 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:43
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4712d8ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffecd1fea78 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 000000000001d9ca RCX: 00007f4712d8ebe9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000001 R09: 00000005cd1fed6f
R10: 0000001b31820000 R11: 0000000000000246 R12: 00007f4712fc5fac
R13: 00007f4712fc5fa0 R14: ffffffffffffffff R15: 0000000000000003
 </TASK>

Allocated by task 6604:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:388 [inline]
 __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:405
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __do_kmalloc_node mm/slub.c:4365 [inline]
 __kmalloc_node_noprof+0x276/0x4e0 mm/slub.c:4371
 kmalloc_node_noprof include/linux/slab.h:932 [inline]
 __bpf_map_area_alloc kernel/bpf/syscall.c:393 [inline]
 bpf_map_area_alloc+0x64/0x180 kernel/bpf/syscall.c:406
 prealloc_elems_and_freelist+0x86/0x1d0 kernel/bpf/stackmap.c:51
 stack_map_alloc+0x33f/0x4c0 kernel/bpf/stackmap.c:114
 map_create+0xaa0/0x14d0 kernel/bpf/syscall.c:1480
 __sys_bpf+0x60f/0x870 kernel/bpf/syscall.c:6011
 __do_sys_bpf kernel/bpf/syscall.c:6139 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6137 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6137
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88803019c000
 which belongs to the cache kmalloc-cg-1k of size 1024
The buggy address is located 24 bytes to the right of
 allocated 576-byte region [ffff88803019c000, ffff88803019c240)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x30198
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88803364ea01
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801a44b280 ffffea0000c26000 0000000000000002
raw: 0000000000000000 0000000080100010 00000000f5000000 ffff88803364ea01
head: 00fff00000000040 ffff88801a44b280 ffffea0000c26000 0000000000000002
head: 0000000000000000 0000000080100010 00000000f5000000 ffff88803364ea01
head: 00fff00000000003 ffffea0000c06601 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5529, tgid 5529 (dhcpcd), ts 79177848787, free_ts 77855014860
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1851
 prep_new_page mm/page_alloc.c:1859 [inline]
 get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3858
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5148
 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416
 alloc_slab_page mm/slub.c:2487 [inline]
 allocate_slab+0x8a/0x370 mm/slub.c:2655
 new_slab mm/slub.c:2709 [inline]
 ___slab_alloc+0xbeb/0x1410 mm/slub.c:3891
 __slab_alloc mm/slub.c:3981 [inline]
 __slab_alloc_node mm/slub.c:4056 [inline]
 slab_alloc_node mm/slub.c:4217 [inline]
 __do_kmalloc_node mm/slub.c:4364 [inline]
 __kmalloc_node_track_caller_noprof+0x2f8/0x4e0 mm/slub.c:4384
 kmalloc_reserve+0x136/0x290 net/core/skbuff.c:600
 __alloc_skb+0x142/0x2d0 net/core/skbuff.c:669
 alloc_skb include/linux/skbuff.h:1336 [inline]
 alloc_skb_with_frags+0xca/0x890 net/core/skbuff.c:6665
 sock_alloc_send_pskb+0x857/0x990 net/core/sock.c:2980
 unix_dgram_sendmsg+0x461/0x1850 net/unix/af_unix.c:2153
 sock_sendmsg_nosec net/socket.c:714 [inline]
 __sock_sendmsg+0x21c/0x270 net/socket.c:729
 sock_write_iter+0x258/0x330 net/socket.c:1179
 do_iter_readv_writev+0x61c/0x8b0 fs/read_write.c:-1
 vfs_writev+0x31a/0x960 fs/read_write.c:1057
page last free pid 5871 tgid 5871 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1395 [inline]
 __free_frozen_pages+0xbc4/0xd30 mm/page_alloc.c:2895
 __folio_put+0x21b/0x2c0 mm/swap.c:112
 put_netmem net/core/skbuff.c:7370 [inline]
 skb_page_unref include/linux/skbuff_ref.h:43 [inline]
 __skb_frag_unref include/linux/skbuff_ref.h:56 [inline]
 skb_release_data+0x49a/0x7c0 net/core/skbuff.c:1080
 skb_release_all net/core/skbuff.c:1151 [inline]
 __kfree_skb+0x55/0x70 net/core/skbuff.c:1165
 tcp_clean_rtx_queue net/ipv4/tcp_input.c:3319 [inline]
 tcp_ack+0x1fd2/0x6150 net/ipv4/tcp_input.c:3922
 tcp_rcv_established+0xe96/0x1eb0 net/ipv4/tcp_input.c:6120
 tcp_v4_do_rcv+0xa23/0xce0 net/ipv4/tcp_ipv4.c:1926
 sk_backlog_rcv include/net/sock.h:1148 [inline]
 __release_sock+0x21c/0x350 net/core/sock.c:3194
 release_sock+0x5f/0x1f0 net/core/sock.c:3748
 tcp_sendmsg+0x39/0x50 net/ipv4/tcp.c:1394
 sock_sendmsg_nosec net/socket.c:714 [inline]
 __sock_sendmsg+0x19c/0x270 net/socket.c:729
 sock_write_iter+0x258/0x330 net/socket.c:1179
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x5c6/0xb30 fs/read_write.c:686
 ksys_write+0x145/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88803019c100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88803019c180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88803019c200: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
                                                    ^
 ffff88803019c280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88803019c300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
----------------
Code disassembly (best guess):
   0:	24 e8                	and    $0xe8,%al
   2:	de 25 93 00 eb 8c    	fisubs -0x7314ff6d(%rip)        # 0x8ceb009b
   8:	e9 f1 fe ff ff       	jmp    0xfffffefe
   d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	90                   	nop
  1c:	90                   	nop
  1d:	90                   	nop
  1e:	90                   	nop
  1f:	90                   	nop
  20:	90                   	nop
  21:	90                   	nop
  22:	90                   	nop
  23:	90                   	nop
  24:	f3 0f 1e fa          	endbr64
  28:	41 57                	push   %r15
* 2a:	41 56                	push   %r14 <-- trapping instruction
  2c:	53                   	push   %rbx
  2d:	49 bf 00 00 00 00 00 	movabs $0xdffffc0000000000,%r15
  34:	fc ff df
  37:	48 c7 c0 20 93 ab 99 	mov    $0xffffffff99ab9320,%rax
  3e:	48                   	rex.W
  3f:	c1                   	.byte 0xc1