==================================================================
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 4096 at addr ffff8800b3d50298 by task syz-executor6/5591

CPU: 0 PID: 5591 Comm: syz-executor6 Not tainted 4.4.133-g3f51ea2 #51
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 2224e2438f70eed6 ffff8800aba07740 ffffffff81e0e4cd
 ffffea0002cf5400 ffff8800b3d50298 0000000000000000 ffff8800b3d50480
 ffff8800b3d50280 ffff8800aba07778 ffffffff815154cc ffff8800b3d50298
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
 [<ffffffff82f20d9d>] SYSC_sendmsg net/socket.c:2007 [inline]
 [<ffffffff82f20d9d>] SyS_sendmsg+0x2d/0x50 net/socket.c:2003
 [<ffffffff838c0f65>] entry_SYSCALL_64_fastpath+0x22/0x9e
SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket

Allocated by task 5591:
 [<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
 [<ffffffff82f20d9d>] SYSC_sendmsg net/socket.c:2007 [inline]
 [<ffffffff82f20d9d>] SyS_sendmsg+0x2d/0x50 net/socket.c:2003
 [<ffffffff838c0f65>] entry_SYSCALL_64_fastpath+0x22/0x9e

Freed by task 4112:
 [<ffffffff810341d6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket
 [<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
 [<ffffffff82f36124>] skb_free_head net/core/skbuff.c:571 [inline]
 [<ffffffff82f36124>] skb_release_data+0x304/0x3b0 net/core/skbuff.c:602
 [<ffffffff82f3621a>] skb_release_all+0x4a/0x60 net/core/skbuff.c:661
 [<ffffffff82f36245>] __kfree_skb+0x15/0x20 net/core/skbuff.c:675
 [<ffffffff82f36347>] kfree_skb+0xf7/0x3e0 net/core/skbuff.c:696
 [<ffffffff832a36bf>] tcp_v4_rcv+0x5f/0x3010 net/ipv4/tcp_ipv4.c:1705
 [<ffffffff832000c7>] ip_local_deliver_finish+0x257/0xa60 net/ipv4/ip_input.c:216
 [<ffffffff83202641>] NF_HOOK_THRESH include/linux/netfilter.h:226 [inline]
 [<ffffffff83202641>] NF_HOOK include/linux/netfilter.h:249 [inline]
 [<ffffffff83202641>] ip_local_deliver+0x1f1/0x380 net/ipv4/ip_input.c:257
 [<ffffffff83200f2a>] dst_input include/net/dst.h:504 [inline]
 [<ffffffff83200f2a>] ip_rcv_finish+0x65a/0x1640 net/ipv4/ip_input.c:365
 [<ffffffff832031b4>] NF_HOOK_THRESH include/linux/netfilter.h:226 [inline]
 [<ffffffff832031b4>] NF_HOOK include/linux/netfilter.h:249 [inline]
 [<ffffffff832031b4>] ip_rcv+0x9e4/0x1190 net/ipv4/ip_input.c:455
 [<ffffffff82f7d956>] __netif_receive_skb_core+0x12d6/0x2940 net/core/dev.c:4019
 [<ffffffff82f7f01b>] __netif_receive_skb+0x5b/0x1b0 net/core/dev.c:4054
 [<ffffffff82f835a6>] process_backlog+0x216/0x6a0 net/core/dev.c:4647
 [<ffffffff82f803e2>] napi_poll net/core/dev.c:4885 [inline]
 [<ffffffff82f803e2>] net_rx_action+0x3a2/0xdb0 net/core/dev.c:4950
 [<ffffffff838c442c>] __do_softirq+0x22c/0xa1a kernel/softirq.c:273

The buggy address belongs to the object at ffff8800b3d50280
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 24 bytes inside of
 512-byte region [ffff8800b3d50280, ffff8800b3d50480)
The buggy address belongs to the page:
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 5627 Comm: modprobe Not tainted 4.4.133-g3f51ea2 #51
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d1efe000 task.stack: ffff8801cfce8000
RIP: 0010:[<ffffffff81e1f581>]  [<ffffffff81e1f581>] rb_set_parent_color include/linux/rbtree_augmented.h:117 [inline]
RIP: 0010:[<ffffffff81e1f581>]  [<ffffffff81e1f581>] ____rb_erase_color lib/rbtree.c:345 [inline]
RIP: 0010:[<ffffffff81e1f581>]  [<ffffffff81e1f581>] rb_erase+0x721/0x1cb0 lib/rbtree.c:429
RSP: 0018:ffff8801db307cf8  EFLAGS: 00010086
RAX: 5028454741505f4e RBX: dffffc0000000000 RCX: ffff8800ab99fe08
RDX: ffffed003b6632e2 RSI: ffff8801db319710 RDI: 0a0508a8e82a0be9
RBP: ffff8801db307d40 R08: ffffffff8533dfd0 R09: 0000000000000001
R10: 0000000000000000 R11: ffff8801d1efe000 R12: ffff8800ab99fdf8
R13: ffff8800ab99fdf9 R14: ffffffff83aa9be8 R15: ffffffff83aa9be0
FS:  0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffdb874fcc4 CR3: 00000001d7f9f000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff844c64e0 ffff8801d1efe000 ffffed003a3dfd1b ffff8801d1efe8e0
 ffff8801bb657df8 ffff8801db319710 ffff8801db319718 0000000000000000
 0000000000000000 ffff8801db307d70 ffffffff81e2c0e8 ffffffff844bdba0
Call Trace:
 <IRQ> 
 [<ffffffff81e2c0e8>] timerqueue_del+0x78/0x170 lib/timerqueue.c:86
 [<ffffffff8129bace>] __remove_hrtimer+0x8e/0x250 kernel/time/hrtimer.c:917
 [<ffffffff8129dafd>] __run_hrtimer kernel/time/hrtimer.c:1242 [inline]
 [<ffffffff8129dafd>] __hrtimer_run_queues+0x2dd/0x1000 kernel/time/hrtimer.c:1325
 [<ffffffff8129f341>] hrtimer_interrupt+0x1b1/0x430 kernel/time/hrtimer.c:1359
 [<ffffffff810ad5c4>] local_apic_timer_interrupt+0x74/0xa0 arch/x86/kernel/apic/apic.c:901
 [<ffffffff838c3b8c>] smp_apic_timer_interrupt+0x7c/0xa0 arch/x86/kernel/apic/apic.c:925
 [<ffffffff838c2ad0>] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:741
 <EOI> 
 [<ffffffff81c5ef99>] selinux_inode_permission+0x269/0x480 security/selinux/hooks.c:2902
 [<ffffffff81c4c4d9>] security_inode_permission+0xb9/0x100 security/security.c:600
 [<ffffffff8153bc23>] __inode_permission2+0x93/0x240 fs/namei.c:425
 [<ffffffff8153be2f>] inode_permission2+0x2f/0x110 fs/namei.c:475
 [<ffffffff815494ac>] may_lookup fs/namei.c:1665 [inline]
 [<ffffffff815494ac>] link_path_walk+0x18c/0x1710 fs/namei.c:1929
 [<ffffffff8154b964>] path_openat+0x1a4/0x3a10 fs/namei.c:3358
 [<ffffffff81551ee7>] do_filp_open+0x197/0x270 fs/namei.c:3393
 [<ffffffff8151b52c>] do_sys_open+0x31c/0x610 fs/open.c:1038
 [<ffffffff8151b84d>] SYSC_open fs/open.c:1056 [inline]
 [<ffffffff8151b84d>] SyS_open+0x2d/0x40 fs/open.c:1051
 [<ffffffff838c0f65>] entry_SYSCALL_64_fastpath+0x22/0x9e
Code: 15 00 00 4c 89 f7 49 89 44 24 10 48 c1 ef 03 80 3c 1f 00 0f 85 fd 14 00 00 48 89 c7 4d 89 e5 4d 89 67 08 48 c1 ef 03 49 83 cd 01 <80> 3c 1f 00 0f 85 95 0f 00 00 4c 89 e7 4c 89 28 48 c1 ef 03 80 
RIP  [<ffffffff81e1f581>] rb_set_parent_color include/linux/rbtree_augmented.h:117 [inline]
RIP  [<ffffffff81e1f581>] ____rb_erase_color lib/rbtree.c:345 [inline]
RIP  [<ffffffff81e1f581>] rb_erase+0x721/0x1cb0 lib/rbtree.c:429
 RSP <ffff8801db307cf8>
---[ end trace dac2fadee2d9930f ]---