Date:   Tue, 02 Jan 2018 15:58:02 -0800
From:   syzbot <syzbot+4c37b2fed0aa8f5b6fda@...kaller.appspotmail.com>
To:     davem@...emloft.net, gregkh@...uxfoundation.org,
        kstewart@...uxfoundation.org, linux-kernel@...r.kernel.org,
        mingo@...nel.org, netdev@...r.kernel.org, pombredanne@...b.com,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de
Subject: WARNING in sk_stream_kill_queues (2)

Hello,

syzkaller hit the following crash on  
37759fa6d0fa9e4d6036d19ac12f555bfc0aeafd
git://git.cmpxchg.org/linux-mmots.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


IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+4c37b2fed0aa8f5b6fda@...kaller.appspotmail.com
It will help syzbot understand when the bug is fixed. See footer for  
details.
If you forward the report, please keep this part and the footer.

audit: type=1400 audit(1514626223.187:7): avc:  denied  { map } for   
pid=3150 comm="syzkaller691304" path="/root/syzkaller691304410" dev="sda1"  
ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023  
tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
device lo entered promiscuous mode
WARNING: CPU: 0 PID: 3151 at net/core/stream.c:206  
sk_stream_kill_queues+0x3c5/0x520 net/core/stream.c:206
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 3151 Comm: syzkaller691304 Not tainted 4.15.0-rc4-mm1+ #49
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS  
Google 01/01/2011
Call Trace:
  __dump_stack lib/dump_stack.c:17 [inline]
  dump_stack+0x194/0x257 lib/dump_stack.c:53
  panic+0x1e4/0x41c kernel/panic.c:183
  __warn+0x1dc/0x200 kernel/panic.c:547
  report_bug+0x211/0x2d0 lib/bug.c:184
  fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:177
  fixup_bug arch/x86/kernel/traps.c:246 [inline]
  do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:295
  do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314
  invalid_op+0x22/0x40 arch/x86/entry/entry_64.S:1079
RIP: 0010:sk_stream_kill_queues+0x3c5/0x520 net/core/stream.c:206
RSP: 0018:ffff8801c8fd7238 EFLAGS: 00010293
RAX: ffff8801ccb6c4c0 RBX: ffff8801ccc74040 RCX: ffffffff842cae35
RDX: 0000000000000000 RSI: ffffffff86540c60 RDI: ffff8801ccc74278
RBP: ffff8801c8fd7278 R08: 1ffff100391fadd6 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000b00
R13: ffff8801ccc74230 R14: ffffffff88449ac0 R15: ffff8801ccc74178
  inet_csk_destroy_sock+0x175/0x3f0 net/ipv4/inet_connection_sock.c:834
  tcp_done+0x1e9/0x240 net/ipv4/tcp.c:3489
  tcp_time_wait+0x60b/0xa60 net/ipv4/tcp_minisocks.c:333
  tcp_rcv_state_process+0x34b0/0x4830 net/ipv4/tcp_input.c:5988
  tcp_v6_do_rcv+0x739/0x11b0 net/ipv6/tcp_ipv6.c:1331
  sk_backlog_rcv include/net/sock.h:907 [inline]
  __release_sock+0x124/0x360 net/core/sock.c:2274
  release_sock+0xa4/0x2a0 net/core/sock.c:2789
  tcp_close+0x57c/0xfc0 net/ipv4/tcp.c:2241
  tls_sk_proto_close+0x4f8/0x800 net/tls/tls_main.c:260
  inet_release+0xed/0x1c0 net/ipv4/af_inet.c:427
  inet6_release+0x50/0x70 net/ipv6/af_inet6.c:433
  sock_release+0x8d/0x1e0 net/socket.c:593
  sock_close+0x16/0x20 net/socket.c:1121
  __fput+0x327/0x7e0 fs/file_table.c:209
  ____fput+0x15/0x20 fs/file_table.c:243
  task_work_run+0x199/0x270 kernel/task_work.c:113
  exit_task_work include/linux/task_work.h:22 [inline]
  do_exit+0x9bb/0x1ad0 kernel/exit.c:869
  do_group_exit+0x149/0x400 kernel/exit.c:972
  SYSC_exit_group kernel/exit.c:983 [inline]
  SyS_exit_group+0x1d/0x20 kernel/exit.c:981
  entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x440839
RSP: 002b:00007fffb9900138 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0100000000000000 RCX: 0000000000440839
RDX: 0000000000440839 RSI: 000000002003b000 RDI: 0000000000000000
RBP: 00000000006cb018 R08: 000000000000001c R09: 00000000004002c8
R10: 000000000000001c R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000401d70 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
    (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..


---
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