macvlan3: entered promiscuous mode
hsr0: entered promiscuous mode
macvlan3: entered allmulticast mode
==================================================================
BUG: KASAN: use-after-free in xfrm_alloc_spi+0x570/0xf30
Read of size 4 at addr ffff88812045c0c4 by task syz.1.1593/11809

CPU: 0 UID: 0 PID: 11809 Comm: syz.1.1593 Not tainted 6.16.0-syzkaller-06620-gae633388cae3 #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_alloc_spi+0x570/0xf30
 pfkey_getspi+0x7a8/0xee0
 pfkey_sendmsg+0xbfe/0x1090
 __sock_sendmsg+0x21c/0x270
 ____sys_sendmsg+0x505/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f854ed8ebe9
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:00007f854fce3038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f854efb5fa0 RCX: 00007f854ed8ebe9
RDX: 0000000020000000 RSI: 0000200000000040 RDI: 0000000000000009
RBP: 00007f854ee11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f854efb6038 R14: 00007f854efb5fa0 R15: 00007ffc6cacabd8
 </TASK>

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88812045f480 pfn:0x12045c
flags: 0x57ff00000000000(node=1|zone=2|lastcpupid=0x7ff)
raw: 057ff00000000000 ffffea0004a59b08 ffffea000419e808 0000000000000000
raw: ffff88812045f480 0000000000120000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 11534, tgid 11533 (syz.0.1520), ts 144194843339, free_ts 147150768367
 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/0x3b0
 ___slab_alloc+0xbfc/0x1480
 kmem_cache_alloc_node_noprof+0x280/0x3c0
 kmalloc_reserve+0xbd/0x290
 __alloc_skb+0x142/0x2d0
 alloc_skb_with_frags+0xca/0x890
 sock_alloc_send_pskb+0x857/0x990
 __ip6_append_data+0x2b43/0x3f30
 ip6_make_skb+0x2ce/0x410
 udpv6_sendmsg+0x1b78/0x24b0
 __sock_sendmsg+0xe5/0x270
 ____sys_sendmsg+0x52d/0x830
page last free pid 11746 tgid 11745 stack trace:
 __free_frozen_pages+0xc71/0xe70
 __put_partials+0x161/0x1c0
 put_cpu_partial+0x17c/0x250
 __slab_free+0x2f7/0x400
 qlist_free_all+0x97/0x140
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 kmem_cache_alloc_node_noprof+0x1bb/0x3c0
 __alloc_skb+0x112/0x2d0
 rtmsg_ifinfo_build_skb+0x84/0x260
 rtnetlink_event+0x1b7/0x270
 notifier_call_chain+0x1b6/0x3e0
 __netdev_upper_dev_unlink+0x1fb/0x7c0
 netdev_upper_dev_unlink+0x91/0xd0
 rtnl_newlink_create+0x7fa/0xb00
 rtnl_newlink+0x16d6/0x1c70

Memory state around the buggy address:
 ffff88812045bf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88812045c000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff88812045c080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                           ^
 ffff88812045c100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88812045c180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
