Date:   Tue, 24 Oct 2017 08:20:54 -0700
From:   syzbot 
        <bot+c91c53af67f9ebe599a337d2e70950366153b295@...kaller.appspotmail.com>
To:     davem@...emloft.net, ebiggers@...gle.com, john.fastabend@...il.com,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        syzkaller-bugs@...glegroups.com, tom@...ntonium.net,
        xiyou.wangcong@...il.com
Subject: WARNING in strp_data_ready

Hello,

syzkaller hit the following crash on  
73d3393ada4f70fa3df5639c8d438f2f034c0ecb
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/master
compiler: gcc (GCC) 7.1.1 20170620
.config is attached
Raw console output is attached.
C reproducer is attached
syzkaller reproducer is attached. See https://goo.gl/kgGztJ
for information about syzkaller reproducers


WARNING: CPU: 0 PID: 2996 at ./include/net/sock.h:1505 sock_owned_by_me  
include/net/sock.h:1505 [inline]
WARNING: CPU: 0 PID: 2996 at ./include/net/sock.h:1505 sock_owned_by_user  
include/net/sock.h:1511 [inline]
WARNING: CPU: 0 PID: 2996 at ./include/net/sock.h:1505  
strp_data_ready+0x2b7/0x390 net/strparser/strparser.c:404
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 2996 Comm: syzkaller142210 Not tainted 4.14.0-rc5+ #138
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS  
Google 01/01/2011
Call Trace:
  <IRQ>
  __dump_stack lib/dump_stack.c:16 [inline]
  dump_stack+0x194/0x257 lib/dump_stack.c:52
  panic+0x1e4/0x417 kernel/panic.c:181
  __warn+0x1c4/0x1d9 kernel/panic.c:542
  report_bug+0x211/0x2d0 lib/bug.c:183
  fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:178
  do_trap_no_signal arch/x86/kernel/traps.c:212 [inline]
  do_trap+0x260/0x390 arch/x86/kernel/traps.c:261
  do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:298
  do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:311
  invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:905
RIP: 0010:sock_owned_by_me include/net/sock.h:1505 [inline]
RIP: 0010:sock_owned_by_user include/net/sock.h:1511 [inline]
RIP: 0010:strp_data_ready+0x2b7/0x390 net/strparser/strparser.c:404
RSP: 0018:ffff8801db206b18 EFLAGS: 00010206
RAX: ffff8801d1e02080 RBX: ffff8801dad74c48 RCX: 0000000000000000
RDX: 0000000000000100 RSI: ffff8801d29fa0a0 RDI: ffffffff85cbede0
RBP: ffff8801db206b38 R08: 0000000000000005 R09: 1ffffffff0ce0bcd
R10: ffff8801db206a00 R11: dffffc0000000000 R12: ffff8801d29fa000
R13: ffff8801dad74c50 R14: ffff8801d4350a92 R15: 0000000000000001
  psock_data_ready+0x56/0x70 net/kcm/kcmsock.c:353
  tcp_child_process+0x559/0x990 net/ipv4/tcp_minisocks.c:818
  tcp_v4_rcv+0x17e1/0x2f20 net/ipv4/tcp_ipv4.c:1682
  ip_local_deliver_finish+0x2e2/0xba0 net/ipv4/ip_input.c:216
  NF_HOOK include/linux/netfilter.h:249 [inline]
  ip_local_deliver+0x1ce/0x6e0 net/ipv4/ip_input.c:257
  dst_input include/net/dst.h:464 [inline]
  ip_rcv_finish+0x887/0x19a0 net/ipv4/ip_input.c:397
  NF_HOOK include/linux/netfilter.h:249 [inline]
  ip_rcv+0xc3f/0x17d0 net/ipv4/ip_input.c:493
  __netif_receive_skb_core+0x19af/0x33d0 net/core/dev.c:4428
  __netif_receive_skb+0x2c/0x1b0 net/core/dev.c:4466
  process_backlog+0x203/0x740 net/core/dev.c:5144
  napi_poll net/core/dev.c:5542 [inline]
  net_rx_action+0x792/0x1910 net/core/dev.c:5608
  __do_softirq+0x2d7/0xb85 kernel/softirq.c:284
  do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:957
  </IRQ>
  do_softirq.part.22+0x14d/0x190 kernel/softirq.c:328
  do_softirq kernel/softirq.c:176 [inline]
  __local_bh_enable_ip+0x135/0x160 kernel/softirq.c:181
  local_bh_enable include/linux/bottom_half.h:31 [inline]
  rcu_read_unlock_bh include/linux/rcupdate.h:726 [inline]
  ip_finish_output2+0x8ad/0x1460 net/ipv4/ip_output.c:231
  ip_finish_output+0x85e/0xd10 net/ipv4/ip_output.c:317
  NF_HOOK_COND include/linux/netfilter.h:238 [inline]
  ip_output+0x1cc/0x860 net/ipv4/ip_output.c:405
  dst_output include/net/dst.h:458 [inline]
  ip_local_out+0x95/0x160 net/ipv4/ip_output.c:124
  ip_queue_xmit+0x8c6/0x18e0 net/ipv4/ip_output.c:504
  tcp_transmit_skb+0x19a1/0x3450 net/ipv4/tcp_output.c:1123
  tcp_send_ack.part.34+0x386/0x610 net/ipv4/tcp_output.c:3557
  tcp_send_ack+0x49/0x60 net/ipv4/tcp_output.c:3527
  tcp_rcv_synsent_state_process net/ipv4/tcp_input.c:5756 [inline]
  tcp_rcv_state_process+0x4a25/0x4d10 net/ipv4/tcp_input.c:5891
  tcp_v4_do_rcv+0x55c/0x7d0 net/ipv4/tcp_ipv4.c:1482
  sk_backlog_rcv include/net/sock.h:909 [inline]
  __release_sock+0x124/0x360 net/core/sock.c:2264
  release_sock+0xa4/0x2a0 net/core/sock.c:2776
  inet_wait_for_connect net/ipv4/af_inet.c:557 [inline]
  __inet_stream_connect+0x651/0xf00 net/ipv4/af_inet.c:643
  inet_stream_connect+0x58/0xa0 net/ipv4/af_inet.c:682
  SYSC_connect+0x204/0x470 net/socket.c:1642
  SyS_connect+0x24/0x30 net/socket.c:1623
  entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x43ff69
RSP: 002b:00007ffcf59753a8 EFLAGS: 00000217 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043ff69
RDX: 0000000000000010 RSI: 00000000200d1ff0 RDI: 0000000000000004
RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004018d0
R13: 0000000000401960 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
    (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..


---
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