[asterisk-bugs] [DAHDI-linux 0015252]: procfs in dahdi can produce wrong (broken) data and warning

[Asterisk Bug Tracker]

The following issue has been SUBMITTED. 
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https://issues.asterisk.org/view.php?id=15252 
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Reported By:                biohumanoid
Assigned To:                
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Project:                    DAHDI-linux
Issue ID:                   15252
Category:                   dahdi (the module)
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     new
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Date Submitted:             2009-06-02 06:11 CDT
Last Modified:              2009-06-02 06:11 CDT
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Summary:                    procfs in dahdi can produce wrong (broken) data and
warning
Description: 
/* In Linux 2.6, this MUST NOT EXECEED 1024 bytes in one read! */
It's not truth...

/* In Linux 2.6, page is always PROC_BLOCK_SIZE=(PAGE_SIZE-1024) bytes.
 * 0<count<=PROC_BLOCK_SIZE . count=1 will produce an error in
 * vsnprintf ('head -c 1 /proc/dahdi/1', 'dd bs=1').*/

head -c 10 /proc/dahdi/1 or if you have a lot of channels, you will see
the following:
May 25 15:48:28 asteroid kernel: [  722.051812] WARNING: at
lib/vsprintf.c:609 vsnprintf+0x38/0x452()
and a broken output...

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Issue History 
Date Modified    Username       Field                    Change               
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2009-06-02 06:11 biohumanoid    New Issue                                    
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