================================================================== 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 7712 at addr ffff8801cc109ab8 by task syz-executor3/7475 CPU: 0 PID: 7475 Comm: syz-executor3 Not tainted 4.17.0-rc3+ #37 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:00007f4e9b0eec68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f4e9b0ef6d4 RCX: 0000000000455979 RDX: 0000000000000000 RSI: 0000000020000a40 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000538 R14: 00000000006fbde0 R15: 0000000000000000 Allocated by task 7475: 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 6104: 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 rtmsg_fib+0x369/0x4d0 net/ipv4/fib_semantics.c:428 fib_table_insert+0x794/0x1790 net/ipv4/fib_trie.c:1287 fib_magic.isra.21+0x618/0x820 net/ipv4/fib_frontend.c:875 fib_add_ifaddr+0x181/0x4e0 net/ipv4/fib_frontend.c:897 fib_inetaddr_event+0x172/0x222 net/ipv4/fib_frontend.c:1180 notifier_call_chain+0x178/0x380 kernel/notifier.c:93 __blocking_notifier_call_chain kernel/notifier.c:317 [inline] blocking_notifier_call_chain+0x139/0x170 kernel/notifier.c:328 __inet_insert_ifa+0x834/0xb70 net/ipv4/devinet.c:518 inet_rtm_newaddr+0xd68/0x11d0 net/ipv4/devinet.c:906 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 ffff8801cc109a40 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 120 bytes inside of 512-byte region [ffff8801cc109a40, ffff8801cc109c40) The buggy address belongs to the page: page:ffffea0007304240 count:1 mapcount:0 mapping:ffff8801cc109040 index:0xffff8801cc109040 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffff8801cc109040 ffff8801cc109040 0000000100000005 raw: ffffea0007356360 ffffea000759e820 ffff8801da800940 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801cc109b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801cc109b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8801cc109c00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff8801cc109c80: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 ffff8801cc109d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 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