device bridge0 entered promiscuous mode ================================================================== 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 4096 at addr ffff8801d7fb1ac0 by task syz-executor4/9031 CPU: 0 PID: 9031 Comm: syz-executor4 Not tainted 4.17.0-rc2+ #24 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 kernel msg: ebtables bug: please report to author: nentries does not equal the nr of entries in the (last) chain __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:00007efff89c7c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007efff89c86d4 RCX: 0000000000455979 RDX: 0000000000000000 RSI: 0000000020b6dfc8 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000538 R14: 00000000006fbde0 R15: 0000000000000000 Allocated by task 9031: 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:989 [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 4884: 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 inet6_netconf_notify_devconf+0x107/0x1e0 net/ipv6/addrconf.c:589 __addrconf_sysctl_register+0x2b8/0x430 net/ipv6/addrconf.c:6482 addrconf_sysctl_register+0x13c/0x1e0 net/ipv6/addrconf.c:6519 ipv6_add_dev+0xb35/0x1380 net/ipv6/addrconf.c:448 addrconf_notify+0x9d4/0x2650 net/ipv6/addrconf.c:3416 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:1735 call_netdevice_notifiers net/core/dev.c:1753 [inline] register_netdevice+0xb95/0x11c0 net/core/dev.c:8001 veth_newlink+0x4e9/0xa70 drivers/net/veth.c:416 rtnl_newlink+0xe94/0x1a50 net/core/rtnetlink.c:3036 rtnetlink_rcv_msg+0x466/0xc10 net/core/rtnetlink.c:4648 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2448 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:4666 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0x58b/0x740 net/netlink/af_netlink.c:1336 netlink_sendmsg+0x9f0/0xfa0 net/netlink/af_netlink.c:1901 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 The buggy address belongs to the object at ffff8801d7fb1a80 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 64 bytes inside of 512-byte region [ffff8801d7fb1a80, ffff8801d7fb1c80) The buggy address belongs to the page: page:ffffea00075fec40 count:1 mapcount:0 mapping:ffff8801d7fb1080 index:0x0 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffff8801d7fb1080 0000000000000000 0000000100000006 raw: ffffea00071aaea0 ffffea0007608860 ffff8801da800940 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801d7fb1b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801d7fb1c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8801d7fb1c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8801d7fb1d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801d7fb1d80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================