==================================================================
BUG: KASAN: slab-out-of-bounds in __bpf_get_stackid+0x868/0xcf0
Write of size 8 at addr ffff88806c088648 by task syz.2.3665/18912

CPU: 1 UID: 0 PID: 18912 Comm: syz.2.3665 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 print_report+0xca/0x240
 kasan_report+0x118/0x150
 __bpf_get_stackid+0x868/0xcf0
 bpf_get_stackid_raw_tp+0x196/0x210
 bpf_prog_12712c88fd19bd5b+0x2a/0x32
 bpf_trace_run4+0x28e/0x4a0
 trace_mm_page_alloc+0x129/0x150
 __alloc_frozen_pages_noprof+0x1d6/0x370
 alloc_pages_bulk_noprof+0x560/0x710
 kasan_populate_vmalloc+0xba/0x1a0
 alloc_vmap_area+0xd51/0x1490
 __get_vm_area_node+0x1f8/0x300
 vmap+0x162/0x310
 bpf_ringbuf_alloc+0x341/0x590
 ringbuf_map_alloc+0x1c8/0x2f0
 map_create+0xaa3/0x14d0
 __sys_bpf+0x60f/0x870
 __x64_sys_bpf+0x7c/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb8ef18ebe9
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:00007fb8ed3f6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fb8ef3b5fa0 RCX: 00007fb8ef18ebe9
RDX: 0000000000000048 RSI: 00002000000007c0 RDI: 0000000000000000
RBP: 00007fb8ef211e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb8ef3b6038 R14: 00007fb8ef3b5fa0 R15: 00007ffe70126f38
 </TASK>

Allocated by task 18912:
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_node_noprof+0x276/0x4e0
 bpf_map_area_alloc+0x64/0x180
 prealloc_elems_and_freelist+0x86/0x1d0
 stack_map_alloc+0x33f/0x4c0
 map_create+0xaa3/0x14d0
 __sys_bpf+0x60f/0x870
 __x64_sys_bpf+0x7c/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88806c088000
 which belongs to the cache kmalloc-cg-2k of size 2048
The buggy address is located 8 bytes to the right of
 allocated 1600-byte region [ffff88806c088000, ffff88806c088640)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6c088
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88810cbea601
anon flags: 0x4fff00000000040(head|node=1|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 04fff00000000040 ffff88801a44b3c0 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000080008 00000000f5000000 ffff88810cbea601
head: 04fff00000000040 ffff88801a44b3c0 0000000000000000 dead000000000001
head: 0000000000000000 0000000000080008 00000000f5000000 ffff88810cbea601
head: 04fff00000000003 ffffea0001b02201 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 18142, tgid 18139 (syz.2.3452), ts 440415798157, free_ts 434996427717
 post_alloc_hook+0x240/0x2a0
 get_page_from_freelist+0x21e4/0x22c0
 __alloc_frozen_pages_noprof+0x181/0x370
 alloc_pages_mpol+0x232/0x4a0
 allocate_slab+0x8a/0x370
 ___slab_alloc+0xbeb/0x1410
 __kmalloc_node_track_caller_noprof+0x2f8/0x4e0
 kmemdup_noprof+0x2b/0x70
 neigh_sysctl_register+0x9f/0xa80
 devinet_sysctl_register+0xad/0x200
 inetdev_init+0x2b4/0x500
 inetdev_event+0x301/0x15b0
 notifier_call_chain+0x1b6/0x3e0
 register_netdevice+0x1608/0x1ae0
 __ip_tunnel_create+0x3e7/0x560
 ip_tunnel_init_net+0x2ba/0x800
page last free pid 17915 tgid 17913 stack trace:
 __free_frozen_pages+0xbc4/0xd30
 __folio_put+0x21b/0x2c0
 __mptcp_clean_una+0x1aa/0xe50
 __mptcp_clean_una_wakeup+0x7f/0x300
 mptcp_release_cb+0x786/0x960
 release_sock+0x1a3/0x1f0
 sk_stream_wait_memory+0x724/0xf70
 mptcp_sendmsg+0x1061/0x1970
 __sock_sendmsg+0x19c/0x270
 sock_write_iter+0x258/0x330
 vfs_write+0x5c9/0xb30
 ksys_write+0x145/0x250
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88806c088500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88806c088580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88806c088600: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
                                              ^
 ffff88806c088680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88806c088700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
