random: sshd: uninitialized urandom read (32 bytes read, 124 bits of entropy available)
==================================================================
BUG: KASAN: slab-out-of-bounds in pfkey_msg2xfrm_state net/key/af_key.c:1180 [inline]
BUG: KASAN: slab-out-of-bounds in pfkey_add+0x270e/0x3490 net/key/af_key.c:1498
Read of size 6144 at addr ffff8801d5546018 by task syzkaller528407/3319

CPU: 1 PID: 3319 Comm: syzkaller528407 Not tainted 4.4.110-gdac1439 #13
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 563e92c7228dd3f5 ffff8801d01e76f8 ffffffff81d04e3d
 ffffea0007555180 ffff8801d5546018 0000000000000000 ffff8801d5546200
 ffff8801d01e7938 ffff8801d01e7730 ffffffff814fd1f3 ffff8801d5546018
Call Trace:
 [<ffffffff81d04e3d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d04e3d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff814fd1f3>] print_address_description+0x73/0x260 mm/kasan/report.c:252
 [<ffffffff814fd705>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff814fd705>] kasan_report+0x285/0x370 mm/kasan/report.c:408
 [<ffffffff814fc147>] check_memory_region_inline mm/kasan/kasan.c:325 [inline]
 [<ffffffff814fc147>] check_memory_region+0x137/0x190 mm/kasan/kasan.c:332
 [<ffffffff814fc683>] memcpy+0x23/0x50 mm/kasan/kasan.c:367
 [<ffffffff83447a4e>] pfkey_msg2xfrm_state net/key/af_key.c:1180 [inline]
 [<ffffffff83447a4e>] pfkey_add+0x270e/0x3490 net/key/af_key.c:1498
 [<ffffffff8344aece>] pfkey_process+0x61e/0x730 net/key/af_key.c:2826
 [<ffffffff8344c779>] pfkey_sendmsg+0x3a9/0x760 net/key/af_key.c:3670
 [<ffffffff82ded6da>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82ded6da>] sock_sendmsg+0xca/0x110 net/socket.c:635
 [<ffffffff82def2b1>] ___sys_sendmsg+0x6c1/0x7c0 net/socket.c:1962
 [<ffffffff82df1303>] __sys_sendmsg+0xd3/0x190 net/socket.c:1996
 [<ffffffff82edb46a>] C_SYSC_sendmsg net/compat.c:720 [inline]
 [<ffffffff82edb46a>] compat_SyS_sendmsg+0x2a/0x40 net/compat.c:718
 [<ffffffff81006d84>] do_syscall_32_irqs_on arch/x86/entry/common.c:390 [inline]
 [<ffffffff81006d84>] do_fast_syscall_32+0x314/0x890 arch/x86/entry/common.c:457
 [<ffffffff83776f6a>] sysenter_flags_fixed+0xd/0x17

Allocated by task 3319:
 [<ffffffff81035d26>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fc263>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fc52d>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fc52d>] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:616
 [<ffffffff814fcd04>] kasan_krealloc+0x64/0x80 mm/kasan/kasan.c:654
 [<ffffffff814f5af2>] ksize+0x92/0xf0 mm/slub.c:3727
 [<ffffffff82e087e2>] __alloc_skb+0x132/0x600 net/core/skbuff.c:237
 [<ffffffff8344c505>] alloc_skb include/linux/skbuff.h:815 [inline]
 [<ffffffff8344c505>] pfkey_sendmsg+0x135/0x760 net/key/af_key.c:3657
 [<ffffffff82ded6da>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82ded6da>] sock_sendmsg+0xca/0x110 net/socket.c:635
 [<ffffffff82def2b1>] ___sys_sendmsg+0x6c1/0x7c0 net/socket.c:1962
 [<ffffffff82df1303>] __sys_sendmsg+0xd3/0x190 net/socket.c:1996
 [<ffffffff82edb46a>] C_SYSC_sendmsg net/compat.c:720 [inline]
 [<ffffffff82edb46a>] compat_SyS_sendmsg+0x2a/0x40 net/compat.c:718
 [<ffffffff81006d84>] do_syscall_32_irqs_on arch/x86/entry/common.c:390 [inline]
 [<ffffffff81006d84>] do_fast_syscall_32+0x314/0x890 arch/x86/entry/common.c:457
 [<ffffffff83776f6a>] sysenter_flags_fixed+0xd/0x17

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff8801d5546000
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 24 bytes inside of
 512-byte region [ffff8801d5546000, ffff8801d5546200)
The buggy address belongs to the page:
PANIC: double fault, error_code: 0x0
CPU: 1 PID: 3319 Comm: syzkaller528407 Not tainted 4.4.110-gdac1439 #13
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800b54ddf00 task.stack: ffff8801d01e0000
RIP: 0010:[<ffffffff8148f5cd>]  [<ffffffff8148f5cd>] dump_page_badflags+0xd/0x250 mm/debug.c:84
RSP: 0018:ffff880100000000  EFLAGS: 00010046
RAX: ffff8800b54ddf00 RBX: ffffea0007555180 RCX: ffffffff8148f740
RDX: 0000000000000000 RSI: ffffffff838a8320 RDI: ffffea0007555180
RBP: ffff880100000018 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000002 R11: fffffbfff0ad781e R12: 0000000000000000
R13: ffffffff838a8320 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:0000000008cbf840
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: ffff8800fffffff8 CR3: 00000001d22e0000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:

Call Trace:
 <UNK> 
Code: ff e8 a8 e2 06 00 e9 50 fd ff ff e8 9e e2 06 00 e9 1d fd ff ff 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 41 56 41 55 49 89 f5 <41> 54 49 89 d4 53 48 89 fb 48 83 ec 08 e8 61 06 ed ff 48 8d 7b