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BUG: KASAN: slab-out-of-bounds in __hlist_del include/linux/list.h:704 [inline]
BUG: KASAN: slab-out-of-bounds in hlist_del_init include/linux/list.h:717 [inline]
BUG: KASAN: slab-out-of-bounds in __xfrm_policy_unlink+0x9a4/0xa00 net/xfrm/xfrm_policy.c:2213
Write of size 8 at addr ffff888061ae83f0 by task syz-executor0/5091

CPU: 1 PID: 5091 Comm: syz-executor0 Not tainted 5.0.0-rc2+ #12
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1db/0x2d0 lib/dump_stack.c:113
 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:187
 kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317
 __asan_report_store8_noabort+0x17/0x20 mm/kasan/generic_report.c:140
 __hlist_del include/linux/list.h:704 [inline]
 hlist_del_init include/linux/list.h:717 [inline]
 __xfrm_policy_unlink+0x9a4/0xa00 net/xfrm/xfrm_policy.c:2213
 xfrm_policy_flush+0x331/0x460 net/xfrm/xfrm_policy.c:1789
 pfkey_spdflush+0xaf/0x3c0 net/key/af_key.c:2785
 pfkey_process+0x6d2/0x810 net/key/af_key.c:2844
 pfkey_sendmsg+0x5bb/0xfc0 net/key/af_key.c:3683
 sock_sendmsg_nosec net/socket.c:621 [inline]
 sock_sendmsg+0xdd/0x130 net/socket.c:631
 ___sys_sendmsg+0x7ec/0x910 net/socket.c:2116
 __sys_sendmsg+0x112/0x270 net/socket.c:2154
 __do_sys_sendmsg net/socket.c:2163 [inline]
 __se_sys_sendmsg net/socket.c:2161 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2161
 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x458099
Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fe96a12cc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458099
RDX: 0000000000000000 RSI: 0000000020000500 RDI: 0000000000000004
RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe96a12d6d4
R13: 00000000004c559c R14: 00000000004d91d8 R15: 00000000ffffffff

Allocated by task 21787:
 save_stack+0x45/0xd0 mm/kasan/common.c:73
 set_track mm/kasan/common.c:85 [inline]
 __kasan_kmalloc mm/kasan/common.c:496 [inline]
 __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:469
 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:504
 __do_kmalloc_node mm/slab.c:3673 [inline]
 __kmalloc_node+0x4e/0x70 mm/slab.c:3680
 kmalloc_node include/linux/slab.h:588 [inline]
 kvmalloc_node+0x68/0x100 mm/util.c:416
 kvmalloc include/linux/mm.h:604 [inline]
 kvzalloc include/linux/mm.h:612 [inline]
 bucket_table_alloc+0x9f/0x540 lib/rhashtable.c:176
 rhashtable_init+0x525/0xa60 lib/rhashtable.c:1065
 br_mdb_hash_init+0x20/0x30 net/bridge/br_multicast.c:2356
 br_dev_init+0x116/0x340 net/bridge/br_device.c:134
 register_netdevice+0x30d/0x10b0 net/core/dev.c:8559
 register_netdev+0x30/0x50 net/core/dev.c:8744
 br_add_bridge+0xa4/0x100 net/bridge/br_if.c:460
 br_ioctl_deviceless_stub+0x99e/0xb00 net/bridge/br_ioctl.c:378
 sock_ioctl+0x2f0/0x6c0 net/socket.c:1041
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:509 [inline]
 do_vfs_ioctl+0x107b/0x17d0 fs/ioctl.c:696
 ksys_ioctl+0xab/0xd0 fs/ioctl.c:713
 __do_sys_ioctl fs/ioctl.c:720 [inline]
 __se_sys_ioctl fs/ioctl.c:718 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718
 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 8001:
 save_stack+0x45/0xd0 mm/kasan/common.c:73
 set_track mm/kasan/common.c:85 [inline]
 __kasan_slab_free+0x102/0x150 mm/kasan/common.c:458
 kasan_slab_free+0xe/0x10 mm/kasan/common.c:466
 __cache_free mm/slab.c:3487 [inline]
 kfree+0xcf/0x230 mm/slab.c:3806
 xfrm_policy_destroy_rcu+0x48/0x60 net/xfrm/xfrm_policy.c:407
 __rcu_reclaim kernel/rcu/rcu.h:240 [inline]
 rcu_do_batch kernel/rcu/tree.c:2452 [inline]
 invoke_rcu_callbacks kernel/rcu/tree.c:2773 [inline]
 rcu_process_callbacks+0xc4a/0x1680 kernel/rcu/tree.c:2754
 __do_softirq+0x30b/0xb11 kernel/softirq.c:292

The buggy address belongs to the object at ffff888061ae8040
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 944 bytes inside of
 1024-byte region [ffff888061ae8040, ffff888061ae8440)
The buggy address belongs to the page:
page:ffffea000186ba00 count:1 mapcount:0 mapping:ffff88812c3f0ac0 index:0x0 compound_mapcount: 0
flags: 0x1fffc0000010200(slab|head)
raw: 01fffc0000010200 ffffea00026e7108 ffffea0002977988 ffff88812c3f0ac0
raw: 0000000000000000 ffff888061ae8040 0000000100000007 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888061ae8280: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
 ffff888061ae8300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888061ae8380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
kobject: 'loop2' (00000000e0e1c69a): fill_kobj_path: path = '/devices/virtual/block/loop2'
                                                             ^
 ffff888061ae8400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888061ae8480: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
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