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Re: [Qemu-devel] [PATCH] Convert fprintf() to error_request(): virtio-9p
From: |
Stefan Hajnoczi |
Subject: |
Re: [Qemu-devel] [PATCH] Convert fprintf() to error_request(): virtio-9p |
Date: |
Wed, 1 Dec 2010 21:17:26 +0000 |
On Wed, Dec 1, 2010 at 6:01 PM, Venkateswararao Jujjuri (JV)
<address@hidden> wrote:
> On 12/1/2010 1:35 AM, Stefan Hajnoczi wrote:
>> On Tue, Nov 30, 2010 at 9:52 AM, Sanchit Garg
>> <address@hidden> wrote:
>>> @@ -3707,19 +3708,19 @@ VirtIODevice *virtio_9p_init(DeviceState *dev,
>>> V9fsConf *conf)
>>> s->ctx.fs_sm = SM_NONE;
>>> s->ctx.xops = none_xattr_ops;
>>> } else {
>>> - fprintf(stderr, "Default to security_model=none. You may want"
>>> + error_report("Default to security_model=none. You may want"
>>> " enable advanced security model using "
>>> "security option:\n\t security_model=passthrough \n\t "
>>> - "security_model=mapped\n");
>>> + "security_model=mapped");
>>> s->ctx.fs_sm = SM_NONE;
>>> s->ctx.xops = none_xattr_ops;
>>> }
>>
>> It would be safer to avoid embedded \n\t. Although I can't find
>> anything prohibiting it in the source, no other place does this.
>> Program output is easier to handle when constrained to one message per
>> line. Security issues arise when unfiltered inputs are logged *and*
>> linebreaks are allowed because malicious input can inject fake log
>> lines. Let's avoid getting into the habit.
>
> Embedded breaks were introduced to give more readable and formatted output.
> Stafan do you suggest to print the entire message in one line?
Yes, exactly.
Stefan