カーネルパニック: NULL pointer dereference at tcp_ioctl.

Issue

• tcp_ioctl でクラッシュし、カーネルパニックが発生しました。

BUG: unable to handle kernel NULL pointer dereference at 000000000000000d
IP:[<ffffffff8148c479>] tcp_ioctl+0x189/0x1c0
PGD 866e02067 PUD 0 
Oops:0000 [#1] SMP 
last sysfs file:/sys/devices/virtual/net/bond0.2773/broadcast
CPU 30 
Pid:305160, comm: java Not tainted 2.6.32-358.23.2.el6.x86_64 #1 NEC Express5800/B120e-h [N8400-216Y]/G7LYM
RIP:0010:[<ffffffff8148c479>]  [<ffffffff8148c479>] tcp_ioctl+0x189/0x1c0
RSP:0018:ffff8805cfd9bdf8  EFLAGS:00010282
RAX:0000000000000000 RBX: ffff88105c2c70c0 RCX:0000000000000000
RDX:0000000000000000 RSI:0000000000000002 RDI: ffff88105c2c70c0
RBP: ffff8805cfd9be18 R08: ffffffff81668f40 R09:00000000ef816710
R10:000000000001504e R11:0000000000000246 R12:00007f42e03cf504
R13:00000000000202d0 R14: ffff8800775dba40 R15:00007f453575f800
FS:00007f42e03d0700(0000) GS:ffff88089c680000(0000) knlGS:0000000000000000
CS:0010 DS:0000 ES:0000 CR0:0000000080050033
CR2:000000000000000d CR3:00000003c2ea3000 CR4:00000000001407e0
DR0:0000000000000000 DR1:0000000000000000 DR2:0000000000000000
DR3:0000000000000000 DR6:00000000ffff0ff0 DR7:0000000000000400
Process java (pid:305160, threadinfo ffff8805cfd9a000, task ffff8806c0722ae0)
Stack:
 0000000000000000 000000000000541b 00007f42e03cf504 ffffffff81b165c0
<d> ffff8805cfd9be28 ffffffffa028da30 ffff8805cfd9be58 ffffffff81434d4a
<d> ffff880570cf2bc0 ffff8800775dba88 00007f42e03cf504 0000000000000628
Call Trace:
 [<ffffffffa028da30>] inet6_ioctl+0x30/0xb0 [ipv6]
 [<ffffffff81434d4a>] sock_ioctl+0x7a/0x280
 [<ffffffff81195322>] vfs_ioctl+0x22/0xa0
 [<ffffffff811954c4>] do_vfs_ioctl+0x84/0x580
 [<ffffffff810ace7b>] ? sys_futex+0x7b/0x170
 [<ffffffff81195a41>] sys_ioctl+0x81/0xa0
 [<ffffffff8100b072>] system_call_fastpath+0x16/0x1b
Code:8b 42 08 48 39 c2 0f 84 66 ff ff ff 45 85 ed 0f 84 5d ff ff ff 48 85 c0 0f 84 54 ff ff ff 8b 90 bc 00 00 00 48 8b 80 d0 00 00 00 <0f> b6 44 10 0d 83 e0 01 41 29 c5 e9 37 ff ff ff 0f 1f 80 00 00 
RIP  [<ffffffff8148c479>] tcp_ioctl+0x189/0x1c0
 RSP <ffff8805cfd9bdf8>
CR2:000000000000000d