audit: type=1804 audit(1547432587.823:424): pid=24607 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor2" name="/root/syzkaller-testdir305472304/syzkaller.kBTBZE/1154/memory.events" dev="sda1" ino=16532 res=1 ================================================================== BUG: KASAN: slab-out-of-bounds in __write_once_size include/linux/compiler.h:218 [inline] BUG: KASAN: slab-out-of-bounds in __hlist_del include/linux/list.h:702 [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+0x977/0xa00 net/xfrm/xfrm_policy.c:2213 Write of size 8 at addr ffff8880a4bdaca8 by task kworker/u4:0/26522 CPU: 1 PID: 26522 Comm: kworker/u4:0 Not tainted 4.20.0+ #3 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net 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:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report mm/kasan/report.c:412 [inline] kasan_report.cold+0x8c/0x2ba mm/kasan/report.c:396 __asan_report_store8_noabort+0x17/0x20 mm/kasan/report.c:438 __write_once_size include/linux/compiler.h:218 [inline] __hlist_del include/linux/list.h:702 [inline] hlist_del_init include/linux/list.h:717 [inline] __xfrm_policy_unlink+0x977/0xa00 net/xfrm/xfrm_policy.c:2213 xfrm_policy_flush+0x331/0x460 net/xfrm/xfrm_policy.c:1789 xfrm_policy_fini+0xbf/0x640 net/xfrm/xfrm_policy.c:3866 xfrm_net_exit+0x1d/0x70 net/xfrm/xfrm_policy.c:3928 ops_exit_list.isra.0+0xb0/0x160 net/core/net_namespace.c:153 cleanup_net+0x51d/0xb10 net/core/net_namespace.c:551 process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153 worker_thread+0x143/0x14a0 kernel/workqueue.c:2296 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Allocated by task 20237: save_stack+0x45/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc mm/kasan/kasan.c:553 [inline] kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:531 __do_kmalloc_node mm/slab.c:3684 [inline] __kmalloc_node+0x51/0x80 mm/slab.c:3691 kmalloc_node include/linux/slab.h:589 [inline] kzalloc_node include/linux/slab.h:752 [inline] qdisc_alloc+0x10e/0xb80 net/sched/sch_generic.c:832 qdisc_create_dflt+0x78/0x1e0 net/sched/sch_generic.c:906 attach_one_default_qdisc net/sched/sch_generic.c:1053 [inline] netdev_for_each_tx_queue include/linux/netdevice.h:2119 [inline] attach_default_qdiscs net/sched/sch_generic.c:1072 [inline] dev_activate+0x816/0xc90 net/sched/sch_generic.c:1115 __dev_open+0x2e2/0x450 net/core/dev.c:1404 dev_open net/core/dev.c:1431 [inline] dev_open+0x100/0x1c0 net/core/dev.c:1424 team_port_add drivers/net/team/team.c:1215 [inline] team_add_slave+0xaab/0x1c80 drivers/net/team/team.c:1945 do_set_master net/core/rtnetlink.c:2364 [inline] do_set_master+0x1d4/0x230 net/core/rtnetlink.c:2338 do_setlink+0xa96/0x3e10 net/core/rtnetlink.c:2499 __rtnl_newlink+0xd58/0x1a70 net/core/rtnetlink.c:3115 rtnl_newlink+0x69/0xa0 net/core/rtnetlink.c:3240 rtnetlink_rcv_msg+0x481/0xc30 net/core/rtnetlink.c:5125 netlink_rcv_skb+0x17d/0x410 net/netlink/af_netlink.c:2477 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5143 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0x574/0x770 net/netlink/af_netlink.c:1336 netlink_sendmsg+0xa05/0xf90 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xdd/0x130 net/socket.c:631 __sys_sendto+0x387/0x5f0 net/socket.c:1788 __do_sys_sendto net/socket.c:1800 [inline] __se_sys_sendto net/socket.c:1796 [inline] __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1796 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 2515: save_stack+0x45/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kfree+0xcf/0x230 mm/slab.c:3817 nf_ct_unregister_sysctl net/netfilter/nf_conntrack_proto.c:75 [inline] nf_ct_l4proto_unregister_sysctl+0xae/0x130 net/netfilter/nf_conntrack_proto.c:204 nf_ct_l4proto_pernet_unregister_one+0x93/0x100 net/netfilter/nf_conntrack_proto.c:296 nf_ct_l4proto_pernet_unregister net/netfilter/nf_conntrack_proto.c:363 [inline] nf_conntrack_proto_pernet_fini+0xa0/0x164 net/netfilter/nf_conntrack_proto.c:966 nf_conntrack_cleanup_net_list+0x204/0x330 net/netfilter/nf_conntrack_core.c:2112 nf_conntrack_pernet_exit+0x11d/0x170 net/netfilter/nf_conntrack_standalone.c:742 ops_exit_list.isra.0+0x105/0x160 net/core/net_namespace.c:156 cleanup_net+0x51d/0xb10 net/core/net_namespace.c:551 process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153 worker_thread+0x143/0x14a0 kernel/workqueue.c:2296 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 The buggy address belongs to the object at ffff8880a4bda900 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 936 bytes inside of 1024-byte region [ffff8880a4bda900, ffff8880a4bdad00) The buggy address belongs to the page: page:ffffea000292f680 count:1 mapcount:0 mapping:ffff88812c3f0ac0 index:0x0 compound_mapcount: 0 flags: 0x1fffc0000010200(slab|head) raw: 01fffc0000010200 ffffea00027db688 ffffea00021c9f08 ffff88812c3f0ac0 raw: 0000000000000000 ffff8880a4bda000 0000000100000007 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a4bdab80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880a4bdac00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880a4bdac80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880a4bdad00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880a4bdad80: 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