==================================================================
BUG: KASAN: slab-out-of-bounds in pfkey_msg2xfrm_state net/key/af_key.c:1227 [inline]
BUG: KASAN: slab-out-of-bounds in pfkey_add+0x145d/0x3220 net/key/af_key.c:1506
Read of size 7744 at addr ffff8801cd0451c0 by task syz-executor3/6651

CPU: 1 PID: 6651 Comm: syz-executor3 Not tainted 4.4.137-ga2e2217 #61
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=8245 sclass=netlink_route_socket
 0000000000000000 0c2585e2afb2c5f6 ffff8801b8537740 ffffffff81e0ee0d
 ffffea0007341100 ffff8801cd0451c0 0000000000000000 ffff8801cd045380
 ffff8801cd045180 ffff8801b8537778 ffffffff81515a16 ffff8801cd0451c0
Call Trace:
 [<ffffffff81e0ee0d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81e0ee0d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff81515a16>] print_address_description+0x6c/0x216 mm/kasan/report.c:252
 [<ffffffff81515d35>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff81515d35>] kasan_report.cold.7+0x175/0x2f7 mm/kasan/report.c:408
 [<ffffffff814f87af>] check_memory_region_inline mm/kasan/kasan.c:325 [inline]
 [<ffffffff814f87af>] check_memory_region+0x14f/0x1b0 mm/kasan/kasan.c:332
 [<ffffffff814f8cf3>] memcpy+0x23/0x50 mm/kasan/kasan.c:367
 [<ffffffff835877fd>] pfkey_msg2xfrm_state net/key/af_key.c:1227 [inline]
 [<ffffffff835877fd>] pfkey_add+0x145d/0x3220 net/key/af_key.c:1506
 [<ffffffff8358be91>] pfkey_process+0x671/0x740 net/key/af_key.c:2834
 [<ffffffff8358d6c6>] pfkey_sendmsg+0x346/0xae0 net/key/af_key.c:3678
 [<ffffffff82f1e32c>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82f1e32c>] sock_sendmsg+0xcc/0x110 net/socket.c:635
 [<ffffffff82f1fdf5>] ___sys_sendmsg+0x745/0x880 net/socket.c:1962
netlink: 212 bytes leftover after parsing attributes in process `syz-executor7'.
netlink: 212 bytes leftover after parsing attributes in process `syz-executor7'.
 [<ffffffff82f21e96>] __sys_sendmsg+0xd6/0x190 net/socket.c:1996
 [<ffffffff82f21f7d>] SYSC_sendmsg net/socket.c:2007 [inline]
 [<ffffffff82f21f7d>] SyS_sendmsg+0x2d/0x50 net/socket.c:2003
 [<ffffffff838c28e5>] entry_SYSCALL_64_fastpath+0x22/0x9e

Allocated by task 6651:
 [<ffffffff810341d6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814f88d3>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814f8bb7>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814f8bb7>] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:616
 [<ffffffff814f9394>] kasan_krealloc+0x64/0x80 mm/kasan/kasan.c:654
 [<ffffffff814f258a>] ksize+0x8a/0xf0 mm/slub.c:3727
 [<ffffffff82f38223>] __alloc_skb+0x133/0x600 net/core/skbuff.c:237
 [<ffffffff8358d47e>] alloc_skb include/linux/skbuff.h:815 [inline]
 [<ffffffff8358d47e>] pfkey_sendmsg+0xfe/0xae0 net/key/af_key.c:3665
 [<ffffffff82f1e32c>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82f1e32c>] sock_sendmsg+0xcc/0x110 net/socket.c:635
 [<ffffffff82f1fdf5>] ___sys_sendmsg+0x745/0x880 net/socket.c:1962
 [<ffffffff82f21e96>] __sys_sendmsg+0xd6/0x190 net/socket.c:1996
 [<ffffffff82f21f7d>] SYSC_sendmsg net/socket.c:2007 [inline]
 [<ffffffff82f21f7d>] SyS_sendmsg+0x2d/0x50 net/socket.c:2003
 [<ffffffff838c28e5>] entry_SYSCALL_64_fastpath+0x22/0x9e

Freed by task 4670:
 [<ffffffff810341d6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814f88d3>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814f9202>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814f9202>] kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:589
 [<ffffffff814f6704>] slab_free_hook mm/slub.c:1383 [inline]
 [<ffffffff814f6704>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff814f6704>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff814f6704>] kfree+0xf4/0x310 mm/slub.c:3749
 [<ffffffff81630b53>] load_elf_binary+0x1fc3/0x4c20 fs/binfmt_elf.c:1079
 [<ffffffff8152ffbf>] search_binary_handler+0x14f/0x6f0 fs/exec.c:1471
 [<ffffffff81533e1d>] exec_binprm fs/exec.c:1513 [inline]
 [<ffffffff81533e1d>] do_execveat_common.isra.36+0x116d/0x1f10 fs/exec.c:1635
 [<ffffffff81535532>] do_execve fs/exec.c:1679 [inline]
 [<ffffffff81535532>] SYSC_execve fs/exec.c:1760 [inline]
 [<ffffffff81535532>] SyS_execve+0x42/0x50 fs/exec.c:1755
 [<ffffffff838c2c05>] return_from_execve+0x0/0x23

The buggy address belongs to the object at ffff8801cd045180
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 64 bytes inside of
 512-byte region [ffff8801cd045180, ffff8801cd045380)
The buggy address belongs to the page:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 6655 at kernel/locking/lockdep.c:973 lock_accessed kernel/locking/lockdep.c:973 [inline]()
WARNING: CPU: 0 PID: 6655 at kernel/locking/lockdep.c:973 __bfs+0x2aa/0x5f0 kernel/locking/lockdep.c:1040()