random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available)
random: sshd: uninitialized urandom read (32 bytes read, 115 bits of entropy available)
random: sshd: uninitialized urandom read (32 bytes read, 119 bits of entropy available)
random: sshd: uninitialized urandom read (32 bytes read, 125 bits of entropy available)
==================================================================
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+0x270e/0x3490 net/key/af_key.c:1506
Read of size 4096 at addr ffff8801c7a20a40 by task syzkaller588092/3783

CPU: 1 PID: 3783 Comm: syzkaller588092 Not tainted 4.4.116-g17c7c49 #17
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 ae7e7e5870b0dc88 ffff8801c50b7778 ffffffff81d03f6d
 ffffea00071e8800 ffff8801c7a20a40 0000000000000000 ffff8801c7a20c00
 ffff8801c50b79b8 ffff8801c50b77b0 ffffffff814fe1c3 ffff8801c7a20a40
Call Trace:
 [<ffffffff81d03f6d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d03f6d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff814fe1c3>] print_address_description+0x73/0x260 mm/kasan/report.c:252
 [<ffffffff814fe6d5>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff814fe6d5>] kasan_report+0x285/0x370 mm/kasan/report.c:408
 [<ffffffff814fd117>] check_memory_region_inline mm/kasan/kasan.c:325 [inline]
 [<ffffffff814fd117>] check_memory_region+0x137/0x190 mm/kasan/kasan.c:332
 [<ffffffff814fd653>] memcpy+0x23/0x50 mm/kasan/kasan.c:367
 [<ffffffff83446d8e>] pfkey_msg2xfrm_state net/key/af_key.c:1188 [inline]
 [<ffffffff83446d8e>] pfkey_add+0x270e/0x3490 net/key/af_key.c:1506
 [<ffffffff8344a27b>] pfkey_process+0x68b/0x750 net/key/af_key.c:2834
 [<ffffffff8344bad9>] pfkey_sendmsg+0x3a9/0x760 net/key/af_key.c:3678
 [<ffffffff82debb4a>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82debb4a>] sock_sendmsg+0xca/0x110 net/socket.c:635
 [<ffffffff82ded721>] ___sys_sendmsg+0x6c1/0x7c0 net/socket.c:1962
 [<ffffffff82def773>] __sys_sendmsg+0xd3/0x190 net/socket.c:1996
 [<ffffffff82def85d>] SYSC_sendmsg net/socket.c:2007 [inline]
 [<ffffffff82def85d>] SyS_sendmsg+0x2d/0x50 net/socket.c:2003
 [<ffffffff83774a1f>] entry_SYSCALL_64_fastpath+0x1c/0x98

Allocated by task 3783:
 [<ffffffff81035de6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fd233>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fd4fd>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fd4fd>] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:616
 [<ffffffff814fdcd4>] kasan_krealloc+0x64/0x80 mm/kasan/kasan.c:654
 [<ffffffff814f6ad2>] ksize+0x92/0xf0 mm/slub.c:3727
 [<ffffffff82e06c02>] __alloc_skb+0x132/0x600 net/core/skbuff.c:237
 [<ffffffff8344b865>] alloc_skb include/linux/skbuff.h:815 [inline]
 [<ffffffff8344b865>] pfkey_sendmsg+0x135/0x760 net/key/af_key.c:3665
 [<ffffffff82debb4a>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82debb4a>] sock_sendmsg+0xca/0x110 net/socket.c:635
 [<ffffffff82ded721>] ___sys_sendmsg+0x6c1/0x7c0 net/socket.c:1962
 [<ffffffff82def773>] __sys_sendmsg+0xd3/0x190 net/socket.c:1996
 [<ffffffff82def85d>] SYSC_sendmsg net/socket.c:2007 [inline]
 [<ffffffff82def85d>] SyS_sendmsg+0x2d/0x50 net/socket.c:2003
 [<ffffffff83774a1f>] entry_SYSCALL_64_fastpath+0x1c/0x98

Freed by task 1985:
 [<ffffffff81035de6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fd233>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fdb52>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fdb52>] kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:589
 [<ffffffff814fa5ec>] slab_free_hook mm/slub.c:1383 [inline]
 [<ffffffff814fa5ec>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff814fa5ec>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff814fa5ec>] kfree+0xfc/0x300 mm/slub.c:3749
 [<ffffffff82e05bdd>] skb_free_head net/core/skbuff.c:571 [inline]
 [<ffffffff82e05bdd>] skb_release_data+0x2ed/0x3b0 net/core/skbuff.c:602
 [<ffffffff82e05cea>] skb_release_all+0x4a/0x60 net/core/skbuff.c:661
 [<ffffffff82e062f3>] __kfree_skb net/core/skbuff.c:675 [inline]
 [<ffffffff82e062f3>] consume_skb+0xf3/0x3d0 net/core/skbuff.c:748
 [<ffffffff82e232ea>] skb_free_datagram+0x1a/0xe0 net/core/datagram.c:280
 [<ffffffff832e9454>] unix_dgram_recvmsg+0x8b4/0xdb0 net/unix/af_unix.c:2196
 [<ffffffff82de857c>] sock_recvmsg_nosec net/socket.c:727 [inline]
 [<ffffffff82de857c>] sock_recvmsg+0x8c/0xc0 net/socket.c:735
 [<ffffffff82dea2b4>] SYSC_recvfrom+0x204/0x330 net/socket.c:1717
 [<ffffffff82def020>] SyS_recvfrom+0x40/0x50 net/socket.c:1689
 [<ffffffff83774a1f>] entry_SYSCALL_64_fastpath+0x1c/0x98

The buggy address belongs to the object at ffff8801c7a20a00
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 64 bytes inside of
 512-byte region [ffff8801c7a20a00, ffff8801c7a20c00)
The buggy address belongs to the page:
PANIC: double fault, error_code: 0x0
CPU: 1 PID: 3783 Comm: syzkaller588092 Not tainted 4.4.116-g17c7c49 #17
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800bb0c6000 task.stack: ffff8801c50b0000
RIP: 0010:[<ffffffff814908bd>]  [<ffffffff814908bd>] dump_page_badflags+0xd/0x250 mm/debug.c:84
RSP: 0018:ffff880100000000  EFLAGS: 00010046
RAX: ffff8800bb0c6000 RBX: ffffea00071e8800 RCX: ffffffff81490a30
RDX: 0000000000000000 RSI: ffffffff838a8e60 RDI: ffffea00071e8800
RBP: ffff880100000018 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000002 R11: fffffbfff0ad7e26 R12: 0000000000000000
R13: ffffffff838a8e60 R14: 0000000000000000 R15: 0000000000000000
FS:  00000000015f2880(0063) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8800fffffff8 CR3: 00000001c99a2000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:

Call Trace:
 <UNK> 
Code: ff e8 88 df 06 00 e9 50 fd ff ff e8 7e df 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 91 04 ed ff 48 8d 7b