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BUG: KASAN: out-of-bounds in __xfrm_state_lookup+0x6ad/0x8d0
Read of size 2 at addr ffff88802a2d0ec2 by task syz.0.2389/11305

CPU: 1 UID: 0 PID: 11305 Comm: syz.0.2389 Not tainted 6.17.0-rc1-syzkaller-00207-g815957293639-dirty #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
 __xfrm_state_lookup+0x6ad/0x8d0
 xfrm_input_state_lookup+0x6e9/0xa60
 xfrm_input+0x425c/0x72c0
 vti_input+0x219/0x330
 tunnel64_rcv+0xdd/0x2d0
 ip_protocol_deliver_rcu+0x2e0/0x440
 ip_local_deliver_finish+0x3bb/0x6f0
 NF_HOOK+0x30c/0x3a0
 ip_sublist_rcv_finish+0x221/0x2a0
 ip_sublist_rcv+0x6e7/0x9b0
 ip_list_rcv+0x3e2/0x430
 __netif_receive_skb_list_core+0x7d2/0x800
 netif_receive_skb_list_internal+0x975/0xcc0
 napi_complete_done+0x2f2/0x7c0
 tun_get_user+0x28d5/0x3e20
 tun_chr_write_iter+0x113/0x200
 vfs_write+0x5c9/0xb30
 ksys_write+0x145/0x250
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6dbad8ebe9
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:00007f6dbbbc5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6dbafb5fa0 RCX: 00007f6dbad8ebe9
RDX: 000000000000004f RSI: 0000200000000100 RDI: 0000000000000003
RBP: 00007f6dbae11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6dbafb6038 R14: 00007f6dbafb5fa0 R15: 00007fff6c0c14c8
 </TASK>

Allocated by task 11304:
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_node_noprof+0x1bb/0x3c0
 kmalloc_reserve+0xbd/0x290
 __alloc_skb+0x142/0x2d0
 tipc_msg_build+0x13b/0xcf0
 __tipc_sendmsg+0x1715/0x2960
 tipc_sendmsg+0x55/0x70
 __sock_sendmsg+0x21c/0x270
 ____sys_sendmsg+0x52d/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __sys_sendmmsg+0x227/0x430
 __x64_sys_sendmmsg+0xa0/0xc0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88802a2d0e00
 which belongs to the cache skbuff_small_head of size 704
The buggy address is located 194 bytes inside of
 704-byte region [ffff88802a2d0e00, ffff88802a2d10c0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2a2d0
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801ceffb40 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000120012 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff88801ceffb40 dead000000000122 0000000000000000
head: 0000000000000000 0000000000120012 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0000a8b401 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 11304, tgid 11303 (syz.1.2390), ts 140505445999, free_ts 139810108003
 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
 kmem_cache_alloc_node_noprof+0x280/0x3c0
 kmalloc_reserve+0xbd/0x290
 __alloc_skb+0x142/0x2d0
 tipc_msg_build+0x13b/0xcf0
 __tipc_sendmsg+0x1715/0x2960
 tipc_sendmsg+0x55/0x70
 __sock_sendmsg+0x21c/0x270
 ____sys_sendmsg+0x52d/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __sys_sendmmsg+0x227/0x430
page last free pid 11263 tgid 11263 stack trace:
 __free_frozen_pages+0xbc4/0xd30
 __put_partials+0x156/0x1a0
 put_cpu_partial+0x17c/0x250
 __slab_free+0x2d5/0x3c0
 qlist_free_all+0x97/0x140
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 __kmalloc_noprof+0x224/0x4f0
 tomoyo_encode+0x28b/0x550
 tomoyo_path_perm+0x2b3/0x4b0
 tomoyo_path_symlink+0xa3/0xe0
 security_path_symlink+0x177/0x380
 do_symlinkat+0x107/0x3f0
 __x64_sys_symlinkat+0x95/0xb0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88802a2d0d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88802a2d0e00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88802a2d0e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                              ^
 ffff88802a2d0f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802a2d0f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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