================================================================== BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:345 [inline] BUG: KASAN: slab-out-of-bounds in pfkey_msg2xfrm_state net/key/af_key.c:1220 [inline] BUG: KASAN: slab-out-of-bounds in pfkey_add+0x1778/0x3210 net/key/af_key.c:1499 Read of size 1697 at addr ffff8801cb46b600 by task syz-executor3/19931 CPU: 0 PID: 19931 Comm: syz-executor3 Not tainted 4.17.0-rc2+ #22 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+0x1b9/0x294 lib/dump_stack.c:113 print_address_description+0x6c/0x20b mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412 check_memory_region_inline mm/kasan/kasan.c:260 [inline] check_memory_region+0x13e/0x1b0 mm/kasan/kasan.c:267 memcpy+0x23/0x50 mm/kasan/kasan.c:302 memcpy include/linux/string.h:345 [inline] pfkey_msg2xfrm_state net/key/af_key.c:1220 [inline] pfkey_add+0x1778/0x3210 net/key/af_key.c:1499 pfkey_process+0x7cc/0x8a0 net/key/af_key.c:2819 pfkey_sendmsg+0x5f4/0x1050 net/key/af_key.c:3658 sock_sendmsg_nosec net/socket.c:629 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:639 ___sys_sendmsg+0x805/0x940 net/socket.c:2117 __sys_sendmsg+0x115/0x270 net/socket.c:2155 __do_sys_sendmsg net/socket.c:2164 [inline] __se_sys_sendmsg net/socket.c:2162 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2162 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455979 RSP: 002b:00007f10bb2eac68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f10bb2eb6d4 RCX: 0000000000455979 RDX: 0000000000000000 RSI: 0000000020b6dfc8 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000004f7 R14: 00000000006fa7c8 R15: 0000000000000000 Allocated by task 19931: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553 __do_kmalloc_node mm/slab.c:3682 [inline] __kmalloc_node_track_caller+0x47/0x70 mm/slab.c:3696 __kmalloc_reserve.isra.38+0x3a/0xe0 net/core/skbuff.c:137 __alloc_skb+0x14d/0x780 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:987 [inline] pfkey_sendmsg+0x250/0x1050 net/key/af_key.c:3645 sock_sendmsg_nosec net/socket.c:629 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:639 ___sys_sendmsg+0x805/0x940 net/socket.c:2117 __sys_sendmsg+0x115/0x270 net/socket.c:2155 __do_sys_sendmsg net/socket.c:2164 [inline] __se_sys_sendmsg net/socket.c:2162 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2162 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 18366: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kfree+0xd9/0x260 mm/slab.c:3813 skb_free_head+0x99/0xc0 net/core/skbuff.c:550 skb_release_data+0x690/0x860 net/core/skbuff.c:570 skb_release_all+0x4a/0x60 net/core/skbuff.c:627 __kfree_skb net/core/skbuff.c:641 [inline] consume_skb+0x18b/0x550 net/core/skbuff.c:701 netlink_broadcast_filtered+0x666/0x1580 net/netlink/af_netlink.c:1512 netlink_broadcast net/netlink/af_netlink.c:1534 [inline] nlmsg_multicast include/net/netlink.h:591 [inline] nlmsg_notify+0xa0/0x1a0 net/netlink/af_netlink.c:2491 rtnl_notify+0xce/0xf0 net/core/rtnetlink.c:724 inet_netconf_notify_devconf+0x125/0x220 net/ipv4/devinet.c:1897 __devinet_sysctl_register+0x1f3/0x2b0 net/ipv4/devinet.c:2315 devinet_sysctl_register+0x163/0x220 net/ipv4/devinet.c:2349 inetdev_init+0x2d4/0x580 net/ipv4/devinet.c:263 inetdev_event+0xf0d/0x1340 net/ipv4/devinet.c:1456 notifier_call_chain+0x178/0x380 kernel/notifier.c:93 __raw_notifier_call_chain kernel/notifier.c:394 [inline] raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401 call_netdevice_notifiers_info+0x3f/0x90 net/core/dev.c:1734 call_netdevice_notifiers net/core/dev.c:1752 [inline] register_netdevice+0xb95/0x11c0 net/core/dev.c:7990 register_netdev+0x30/0x50 net/core/dev.c:8076 ip6gre_init_net+0x47e/0x750 net/ipv6/ip6_gre.c:1502 ops_init+0xff/0x550 net/core/net_namespace.c:128 setup_net+0x3c5/0x950 net/core/net_namespace.c:313 copy_net_ns+0x2bc/0x4c0 net/core/net_namespace.c:436 create_new_namespaces+0x69d/0x8f0 kernel/nsproxy.c:107 unshare_nsproxy_namespaces+0xc3/0x1f0 kernel/nsproxy.c:206 ksys_unshare+0x708/0xf90 kernel/fork.c:2408 __do_sys_unshare kernel/fork.c:2476 [inline] __se_sys_unshare kernel/fork.c:2474 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:2474 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8801cb46b5c0 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 64 bytes inside of 512-byte region [ffff8801cb46b5c0, ffff8801cb46b7c0) The buggy address belongs to the page: page:ffffea00072d1ac0 count:1 mapcount:0 mapping:ffff8801cb46b0c0 index:0x0 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffff8801cb46b0c0 0000000000000000 0000000100000006 raw: ffffea000752eda0 ffffea00071fe9a0 ffff8801da800940 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801cb46b680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801cb46b700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8801cb46b780: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff8801cb46b800: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ffff8801cb46b880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================