================================================================== 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 ffff88809653e870 by task syz-executor4/32133 CPU: 1 PID: 32133 Comm: syz-executor4 Not tainted 4.20.0+ #3 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: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 __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: 0033:0x457ec9 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:00007f720ee8ac78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457ec9 RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f720ee8b6d4 R13: 00000000004c5305 R14: 00000000004d8d70 R15: 00000000ffffffff Allocated by task 10547: 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 mm/slab.c:3722 [inline] __kmalloc+0x15d/0x750 mm/slab.c:3731 kmalloc include/linux/slab.h:551 [inline] kzalloc include/linux/slab.h:741 [inline] __register_sysctl_table+0xc7/0xff0 fs/proc/proc_sysctl.c:1306 register_net_sysctl+0x29/0x30 net/sysctl_net.c:120 neigh_sysctl_register+0x3a5/0x730 net/core/neighbour.c:3659 addrconf_sysctl_register+0xbb/0x1e0 net/ipv6/addrconf.c:6790 ipv6_add_dev net/ipv6/addrconf.c:446 [inline] ipv6_add_dev+0xb34/0x12c0 net/ipv6/addrconf.c:366 addrconf_notify+0xa12/0x25f0 net/ipv6/addrconf.c:3452 notifier_call_chain+0x179/0x380 kernel/notifier.c:93 __raw_notifier_call_chain kernel/notifier.c:394 [inline] raw_notifier_call_chain+0x2e/0x40 kernel/notifier.c:401 call_netdevice_notifiers_info+0x3f/0x90 net/core/dev.c:1739 call_netdevice_notifiers_extack net/core/dev.c:1751 [inline] call_netdevice_notifiers net/core/dev.c:1765 [inline] register_netdevice+0xae0/0x10b0 net/core/dev.c:8658 register_netdev+0x30/0x50 net/core/dev.c:8744 ip6_tnl_init_net+0x694/0xa50 net/ipv6/ip6_tunnel.c:2255 ops_init+0x109/0x5d0 net/core/net_namespace.c:129 setup_net+0x326/0x8c0 net/core/net_namespace.c:314 copy_net_ns+0x2ae/0x4b0 net/core/net_namespace.c:437 create_new_namespaces+0x4ce/0x930 kernel/nsproxy.c:107 unshare_nsproxy_namespaces+0xc2/0x200 kernel/nsproxy.c:206 ksys_unshare+0x6d7/0xfb0 kernel/fork.c:2544 __do_sys_unshare kernel/fork.c:2612 [inline] __se_sys_unshare kernel/fork.c:2610 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:2610 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 9219: 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 skb_free_head+0x93/0xb0 net/core/skbuff.c:553 skb_release_data+0x6ea/0x970 net/core/skbuff.c:573 skb_release_all+0x4d/0x60 net/core/skbuff.c:627 __kfree_skb net/core/skbuff.c:641 [inline] kfree_skb net/core/skbuff.c:659 [inline] kfree_skb+0x199/0x580 net/core/skbuff.c:653 tipc_group_filter_msg+0xd5f/0x1cc0 net/tipc/group.c:560 tipc_sk_filter_rcv+0x1f8b/0x3d50 net/tipc/socket.c:2158 tipc_sk_enqueue+0xb58/0x2130 net/tipc/socket.c:2244 tipc_sk_rcv+0x392/0x1040 net/tipc/socket.c:2295 tipc_node_xmit+0x2d8/0x750 net/tipc/node.c:1383 tipc_node_xmit_skb+0x171/0x260 net/tipc/node.c:1432 tipc_node_distr_xmit+0xd3/0x2b0 net/tipc/node.c:1447 tipc_group_delete+0x2ae/0x440 net/tipc/group.c:224 tipc_sk_leave+0x10f/0x230 net/tipc/socket.c:2904 tipc_release+0x18d/0x16c0 net/tipc/socket.c:581 __sock_release+0xd3/0x250 net/socket.c:579 sock_close+0x1b/0x30 net/socket.c:1141 __fput+0x3c5/0xaf0 fs/file_table.c:278 ____fput+0x16/0x20 fs/file_table.c:309 task_work_run+0x1f4/0x2b0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x32a/0x3b0 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x696/0x800 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff88809653e4c0 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 944 bytes inside of 1024-byte region [ffff88809653e4c0, ffff88809653e8c0) The buggy address belongs to the page: page:ffffea0002594f80 count:1 mapcount:0 mapping:ffff88812c3f0ac0 index:0xffff88809653fb40 compound_mapcount: 0 flags: 0x1fffc0000010200(slab|head) raw: 01fffc0000010200 ffffea00024c9c88 ffffea0002a7f488 ffff88812c3f0ac0 raw: ffff88809653fb40 ffff88809653e040 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88809653e700: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88809653e780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88809653e800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88809653e880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88809653e900: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ==================================================================