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BUG: KASAN: slab-out-of-bounds in pfkey_msg2xfrm_state net/key/af_key.c:1219 [inline] at addr ffff8801ccb41198
BUG: KASAN: slab-out-of-bounds in pfkey_add+0x153e/0x3470 net/key/af_key.c:1498 at addr ffff8801ccb41198
Read of size 8192 by task syzkaller504987/3316
CPU: 0 PID: 3316 Comm: syzkaller504987 Not tainted 4.9.69-g3f1d77c #108
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801cd81f748 ffffffff81d90a29 ffff8801da001280 ffff8801ccb41180
 ffff8801ccb41380 ffffed0039968270 ffff8801ccb41198 ffff8801cd81f770
 ffffffff8153a45c ffffed0039968270 ffff8801da001280 0000000000000000
Call Trace:
 [<ffffffff81d90a29>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d90a29>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8153a45c>] kasan_object_err+0x1c/0x70 mm/kasan/report.c:160
 [<ffffffff8153a71c>] print_address_description mm/kasan/report.c:198 [inline]
 [<ffffffff8153a71c>] kasan_report_error mm/kasan/report.c:287 [inline]
 [<ffffffff8153a71c>] kasan_report.part.1+0x21c/0x500 mm/kasan/report.c:309
 [<ffffffff8153ace1>] kasan_report+0x21/0x30 mm/kasan/report.c:310
 [<ffffffff81539627>] check_memory_region_inline mm/kasan/kasan.c:308 [inline]
 [<ffffffff81539627>] check_memory_region+0x137/0x190 mm/kasan/kasan.c:315
 [<ffffffff81539b23>] memcpy+0x23/0x50 mm/kasan/kasan.c:350
 [<ffffffff8356c1ee>] pfkey_msg2xfrm_state net/key/af_key.c:1219 [inline]
 [<ffffffff8356c1ee>] pfkey_add+0x153e/0x3470 net/key/af_key.c:1498
 [<ffffffff8356470e>] pfkey_process+0x61e/0x730 net/key/af_key.c:2826
 [<ffffffff83565fb9>] pfkey_sendmsg+0x3a9/0x760 net/key/af_key.c:3670
 [<ffffffff82ecfb9a>] sock_sendmsg_nosec net/socket.c:635 [inline]
 [<ffffffff82ecfb9a>] sock_sendmsg+0xca/0x110 net/socket.c:645
 [<ffffffff82ed1791>] ___sys_sendmsg+0x6d1/0x7e0 net/socket.c:1968
 [<ffffffff82ed37c6>] __sys_sendmsg+0xd6/0x190 net/socket.c:2002
 [<ffffffff82ed38ad>] SYSC_sendmsg net/socket.c:2013 [inline]
 [<ffffffff82ed38ad>] SyS_sendmsg+0x2d/0x50 net/socket.c:2009
 [<ffffffff838aab05>] entry_SYSCALL_64_fastpath+0x23/0xc6
Object at ffff8801ccb41180, in cache kmalloc-512 size: 512
Allocated:
PID = 3316
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57
 save_stack+0x43/0xd0 mm/kasan/kasan.c:495
 set_track mm/kasan/kasan.c:507 [inline]
 kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:598
 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:537
 slab_post_alloc_hook mm/slab.h:417 [inline]
 slab_alloc_node mm/slub.c:2715 [inline]
 slab_alloc mm/slub.c:2723 [inline]
 __kmalloc_track_caller+0xda/0x2b0 mm/slub.c:4232
 __kmalloc_reserve.isra.37+0x33/0xc0 net/core/skbuff.c:138
 __alloc_skb+0x119/0x600 net/core/skbuff.c:231
 alloc_skb include/linux/skbuff.h:919 [inline]
 pfkey_sendmsg+0x135/0x760 net/key/af_key.c:3657
 sock_sendmsg_nosec net/socket.c:635 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:645
 ___sys_sendmsg+0x6d1/0x7e0 net/socket.c:1968
 __sys_sendmsg+0xd6/0x190 net/socket.c:2002
 SYSC_sendmsg net/socket.c:2013 [inline]
 SyS_sendmsg+0x2d/0x50 net/socket.c:2009
 entry_SYSCALL_64_fastpath+0x23/0xc6
Freed:
PID = 0
(stack is not available)
Memory state around the buggy address:
 ffff8801ccb41280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801ccb41300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8801ccb41380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                   ^
 ffff8801ccb41400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8801ccb41480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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