==================================================================
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 5120 at addr ffff8800b461c298 by task syz-executor1/13349

CPU: 1 PID: 13349 Comm: syz-executor1 Not tainted 4.4.133-g3f51ea2 #49
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 043dd5473fdead14 ffff8800adf8f6c0 ffffffff81e0e4cd
 ffffea0002d18700 ffff8800b461c298 0000000000000000 ffff8800b461c480
 ffff8800b461c280 ffff8800adf8f6f8 ffffffff815154cc ffff8800b461c298
Call Trace:
 [<ffffffff81e0e4cd>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81e0e4cd>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff815154cc>] print_address_description+0x6c/0x216 mm/kasan/report.c:252
 [<ffffffff815157eb>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff815157eb>] kasan_report.cold.7+0x175/0x2f7 mm/kasan/report.c:408
 [<ffffffff814f826f>] check_memory_region_inline mm/kasan/kasan.c:325 [inline]
 [<ffffffff814f826f>] check_memory_region+0x14f/0x1b0 mm/kasan/kasan.c:332
 [<ffffffff814f87b3>] memcpy+0x23/0x50 mm/kasan/kasan.c:367
 [<ffffffff83585edd>] pfkey_msg2xfrm_state net/key/af_key.c:1227 [inline]
 [<ffffffff83585edd>] pfkey_add+0x145d/0x3220 net/key/af_key.c:1506
 [<ffffffff8358a571>] pfkey_process+0x671/0x740 net/key/af_key.c:2834
 [<ffffffff8358bda6>] pfkey_sendmsg+0x346/0xae0 net/key/af_key.c:3678
 [<ffffffff82f1d14c>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82f1d14c>] sock_sendmsg+0xcc/0x110 net/socket.c:635
 [<ffffffff82f1ec15>] ___sys_sendmsg+0x745/0x880 net/socket.c:1962
 [<ffffffff82f20cb6>] __sys_sendmsg+0xd6/0x190 net/socket.c:1996
 [<ffffffff8300aa0a>] C_SYSC_sendmsg net/compat.c:722 [inline]
 [<ffffffff8300aa0a>] compat_SyS_sendmsg+0x2a/0x40 net/compat.c:720
 [<ffffffff81006d96>] do_syscall_32_irqs_on arch/x86/entry/common.c:392 [inline]
 [<ffffffff81006d96>] do_fast_syscall_32+0x326/0x8b0 arch/x86/entry/common.c:459
 [<ffffffff838c28aa>] sysenter_flags_fixed+0xd/0x17

Allocated by task 13349:
 [<ffffffff810341d6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814f8393>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814f8677>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814f8677>] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:616
 [<ffffffff814f8e54>] kasan_krealloc+0x64/0x80 mm/kasan/kasan.c:654
 [<ffffffff814f204a>] ksize+0x8a/0xf0 mm/slub.c:3727
 [<ffffffff82f37043>] __alloc_skb+0x133/0x600 net/core/skbuff.c:237
 [<ffffffff8358bb5e>] alloc_skb include/linux/skbuff.h:815 [inline]
 [<ffffffff8358bb5e>] pfkey_sendmsg+0xfe/0xae0 net/key/af_key.c:3665
 [<ffffffff82f1d14c>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82f1d14c>] sock_sendmsg+0xcc/0x110 net/socket.c:635
 [<ffffffff82f1ec15>] ___sys_sendmsg+0x745/0x880 net/socket.c:1962
 [<ffffffff82f20cb6>] __sys_sendmsg+0xd6/0x190 net/socket.c:1996
 [<ffffffff8300aa0a>] C_SYSC_sendmsg net/compat.c:722 [inline]
 [<ffffffff8300aa0a>] compat_SyS_sendmsg+0x2a/0x40 net/compat.c:720
 [<ffffffff81006d96>] do_syscall_32_irqs_on arch/x86/entry/common.c:392 [inline]
 [<ffffffff81006d96>] do_fast_syscall_32+0x326/0x8b0 arch/x86/entry/common.c:459
 [<ffffffff838c28aa>] sysenter_flags_fixed+0xd/0x17

Freed by task 11943:
 [<ffffffff810341d6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814f8393>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814f8cc2>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814f8cc2>] kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:589
 [<ffffffff814f61c4>] slab_free_hook mm/slub.c:1383 [inline]
 [<ffffffff814f61c4>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff814f61c4>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff814f61c4>] kfree+0xf4/0x310 mm/slub.c:3749
 [<ffffffff81630477>] load_elf_binary+0x1fb7/0x4c20 fs/binfmt_elf.c:1078
 [<ffffffff8152fa6f>] search_binary_handler+0x14f/0x6f0 fs/exec.c:1471
 [<ffffffff815338cd>] exec_binprm fs/exec.c:1513 [inline]
 [<ffffffff815338cd>] do_execveat_common.isra.36+0x116d/0x1f10 fs/exec.c:1635
 [<ffffffff81534fe2>] do_execve fs/exec.c:1679 [inline]
 [<ffffffff81534fe2>] SYSC_execve fs/exec.c:1760 [inline]
 [<ffffffff81534fe2>] SyS_execve+0x42/0x50 fs/exec.c:1755
 [<ffffffff838c1285>] return_from_execve+0x0/0x23

The buggy address belongs to the object at ffff8800b461c280
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 24 bytes inside of
 512-byte region [ffff8800b461c280, ffff8800b461c480)
The buggy address belongs to the page:
page:ffffea0002d18700 count:1 mapcount:-2146697203 mapping:ffff8800ade4fd28 index:0xffff8800a49afd28
------------[ cut here ]------------
WARNING: CPU: 0 PID: 13348 at lib/debugobjects.c:263 debug_print_object+0x181/0x210 lib/debugobjects.c:260()
ODEBUG: deactivate not available (active state 0) object type: hrtimer hint: 0x300000003