IPVS: Creating netns size=2536 id=1
==================================================================
BUG: KASAN: slab-out-of-bounds in pfkey_msg2xfrm_state net/key/af_key.c:1188 [inline]
BUG: KASAN: slab-out-of-bounds in pfkey_add+0x2702/0x3470 net/key/af_key.c:1506
Read of size 4096 at addr ffff8801c6266a40 by task syz-executor0/3818

CPU: 1 PID: 3818 Comm: syz-executor0 Not tainted 4.9.86-g00db063 #60
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801b0f27718 ffffffff81d956f9 ffffea0007189980 ffff8801c6266a40
 0000000000000000 ffff8801c6266c00 ffff8801b0f27958 ffff8801b0f27750
 ffffffff8153e083 ffff8801c6266a40 0000000000001000 0000000000000000
Call Trace:
 [<ffffffff81d956f9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d956f9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8153e083>] print_address_description+0x73/0x280 mm/kasan/report.c:252
 [<ffffffff8153e5a5>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff8153e5a5>] kasan_report+0x275/0x360 mm/kasan/report.c:408
 [<ffffffff8153cfb7>] check_memory_region_inline mm/kasan/kasan.c:318 [inline]
 [<ffffffff8153cfb7>] check_memory_region+0x137/0x190 mm/kasan/kasan.c:325
 [<ffffffff8153d4f3>] memcpy+0x23/0x50 mm/kasan/kasan.c:360
 [<ffffffff83578222>] pfkey_msg2xfrm_state net/key/af_key.c:1188 [inline]
 [<ffffffff83578222>] pfkey_add+0x2702/0x3470 net/key/af_key.c:1506
 [<ffffffff8356f5cb>] pfkey_process+0x68b/0x750 net/key/af_key.c:2834
 [<ffffffff83570e29>] pfkey_sendmsg+0x3a9/0x760 net/key/af_key.c:3678
 [<ffffffff82ed8baa>] sock_sendmsg_nosec net/socket.c:635 [inline]
 [<ffffffff82ed8baa>] sock_sendmsg+0xca/0x110 net/socket.c:645
 [<ffffffff82eda7c1>] ___sys_sendmsg+0x6d1/0x7e0 net/socket.c:1969
 [<ffffffff82edc7f6>] __sys_sendmsg+0xd6/0x190 net/socket.c:2003
 [<ffffffff82fdf14a>] C_SYSC_sendmsg net/compat.c:734 [inline]
 [<ffffffff82fdf14a>] compat_SyS_sendmsg+0x2a/0x40 net/compat.c:732
 [<ffffffff81006f95>] do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline]
 [<ffffffff81006f95>] do_fast_syscall_32+0x2f5/0x870 arch/x86/entry/common.c:387
 [<ffffffff838b6d10>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137

Allocated by task 3818:
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57
 save_stack+0x43/0xd0 mm/kasan/kasan.c:505
 set_track mm/kasan/kasan.c:517 [inline]
 kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:609
 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:547
 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:3665
 sock_sendmsg_nosec net/socket.c:635 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:645
 ___sys_sendmsg+0x6d1/0x7e0 net/socket.c:1969
 __sys_sendmsg+0xd6/0x190 net/socket.c:2003
 C_SYSC_sendmsg net/compat.c:734 [inline]
 compat_SyS_sendmsg+0x2a/0x40 net/compat.c:732
 do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline]
 do_fast_syscall_32+0x2f5/0x870 arch/x86/entry/common.c:387
 entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137

Freed by task 2146:
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57
 save_stack+0x43/0xd0 mm/kasan/kasan.c:505
 set_track mm/kasan/kasan.c:517 [inline]
 kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:582
 slab_free_hook mm/slub.c:1355 [inline]
 slab_free_freelist_hook mm/slub.c:1377 [inline]
 slab_free mm/slub.c:2958 [inline]
 kfree+0x103/0x300 mm/slub.c:3878
 skb_free_head+0x74/0xb0 net/core/skbuff.c:580
 skb_release_data+0x315/0x3f0 net/core/skbuff.c:611
 skb_release_all+0x4a/0x60 net/core/skbuff.c:670
 __kfree_skb+0x15/0x20 net/core/skbuff.c:684
 kfree_skb+0xcc/0x330 net/core/skbuff.c:705
 netlink_unicast_kernel net/netlink/af_netlink.c:1278 [inline]
 netlink_unicast+0x653/0x750 net/netlink/af_netlink.c:1301
 netlink_sendmsg+0x8e8/0xc50 net/netlink/af_netlink.c:1847
 sock_sendmsg_nosec net/socket.c:635 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:645
 ___sys_sendmsg+0x6d1/0x7e0 net/socket.c:1969
 __sys_sendmsg+0xd6/0x190 net/socket.c:2003
 SYSC_sendmsg net/socket.c:2014 [inline]
 SyS_sendmsg+0x2d/0x50 net/socket.c:2010
 do_syscall_64+0x1a4/0x490 arch/x86/entry/common.c:282
 entry_SYSCALL_64_after_swapgs+0x5d/0xdb

The buggy address belongs to the object at ffff8801c6266a00
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 64 bytes inside of
 512-byte region [ffff8801c6266a00, ffff8801c6266c00)
The buggy address belongs to the page:
page:ffffea0007189980 count:1 mapcount:0 mapping:          (null) index:0x0 compound_mapcount: 0
flags: 0x8000000000004080(slab|head)
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801c6266b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801c6266b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8801c6266c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                   ^
 ffff8801c6266c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801c6266d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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