From: Cong Wang <amwang@redhat.com>
To: Octavian Purdila <opurdila@ixiacom.com>
Cc: David Miller <davem@davemloft.net>,
Linux Kernel Network Developers <netdev@vger.kernel.org>,
Linux Kernel Developers <linux-kernel@vger.kernel.org>,
"Eric W. Biederman" <ebiederm@xmission.com>
Subject: Re: [net-next PATCH v4 1/3] sysctl: refactor integer handling proc code
Date: Tue, 16 Feb 2010 21:09:51 +0800 [thread overview]
Message-ID: <4B7A991F.3040601@redhat.com> (raw)
In-Reply-To: <201002161341.56206.opurdila@ixiacom.com>
Octavian Purdila wrote:
> On Tuesday 16 February 2010 10:41:07 you wrote:
>
>>> +static int proc_skip_wspace(char __user **buf, size_t *size)
>>> +{
>>> + char c;
>>> +
>>> + while (*size) {
>>> + if (get_user(c, *buf))
>>> + return -EFAULT;
>>> + if (!isspace(c))
>>> + break;
>>> + (*size)--; (*buf)++;
>>> + }
>>> +
>>> + return 0;
>>> +}
>> In lib/string.c we have skip_spaces(), I think we can use it
>> here instead of inventing another one.
>>
>
> I'm afraid we can't, skip_spaces does not accept userspace buffers.
Well, you need to use copy_from_user() before call it.
next prev parent reply other threads:[~2010-02-16 13:06 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-15 22:00 [net-next PATCH v4 0/3] net: reserve ports for applications using fixed port Octavian Purdila
2010-02-15 22:00 ` [net-next PATCH v4 1/3] sysctl: refactor integer handling proc code Octavian Purdila
2010-02-16 8:41 ` Cong Wang
2010-02-16 10:48 ` Octavian Purdila
2010-02-16 13:08 ` Cong Wang
2010-02-16 14:00 ` Octavian Purdila
2010-02-17 16:31 ` Cong Wang
2010-02-17 21:09 ` Octavian Purdila
2010-02-18 3:58 ` Octavian Purdila
2010-02-16 11:41 ` Octavian Purdila
2010-02-16 13:09 ` Cong Wang [this message]
2010-02-16 13:44 ` Octavian Purdila
2010-02-17 16:21 ` Cong Wang
2010-02-17 16:33 ` Eric W. Biederman
2010-02-18 4:25 ` Octavian Purdila
2010-02-15 22:00 ` [net-next PATCH v4 2/3] sysctl: add proc_dobitmap Octavian Purdila
2010-02-16 9:12 ` Cong Wang
2010-02-15 22:00 ` [net-next PATCH v4 3/3] net: reserve ports for applications using fixed port numbers Octavian Purdila
2010-02-16 9:37 ` Cong Wang
2010-02-16 11:06 ` Octavian Purdila
2010-02-16 13:06 ` Cong Wang
2010-02-16 13:20 ` Eric Dumazet
2010-02-17 16:13 ` Cong Wang
2010-02-17 16:39 ` Eric Dumazet
2010-02-17 16:01 ` Octavian Purdila
2010-02-20 8:00 ` Cong Wang
2010-02-16 14:25 ` Octavian Purdila
2010-02-17 16:07 ` Cong Wang
2010-02-16 17:25 ` [net-next PATCH v4 0/3] net: reserve ports for applications using fixed port Eric W. Biederman
2010-02-16 18:04 ` Octavian Purdila
2010-02-16 18:49 ` Eric W. Biederman
2010-02-16 19:51 ` Octavian Purdila
2010-02-16 20:08 ` Eric W. Biederman
2010-02-16 21:22 ` Octavian Purdila
2010-02-17 15:57 ` Cong Wang
2010-02-17 16:10 ` Eric W. Biederman
2010-02-17 16:19 ` Cong Wang
2010-02-17 16:26 ` Eric W. Biederman
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