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Subject: Coverity question
Date: Wed, 20 Jun 2007 10:31:44 -0800
Message-ID: <BB375AF679D4A34E9CA8DFA650E2B04E030E351F@onstor-exch02.onstor.net>
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Thread-Topic: Coverity question
Thread-Index: AcezaUDVUnL6hUM+RLqLcn/w2nu3kA==
From: "Mike Lee" <mike.lee@onstor.com>
To: "dl-Data-Manag" <dl-Data-Management@onstor.com>

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Hi Guys:

I'm getting the following finding from Coverity:

From sm-fs/btree/btree.c:

Event stack_use_local_overflow: Local variable "index": stack use of =
1816 bytes exceeds maximum single use of 1024 bytes=20
154 uint32 index[FS_BTREE_MAXKEYS];=20

I am pretty certain that FS_BTREE_MAXKEYS is greater than 1024 by =
design:
#define FS_BTREE_MAXKEYS \
    ((PAGE_SIZE/(sizeof (fs_Extent) + sizeof (uint64) + sizeof =
(uint16))) - 1)


So, does anyone have a recommendation on what to do with this issue?

Thanks.

-Mike

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<P><FONT SIZE=3D2 FACE=3D"Arial">Hi Guys:</FONT>
</P>

<P><FONT SIZE=3D2 FACE=3D"Arial">I'm getting the following finding from =
Coverity:</FONT>
</P>

<P><FONT SIZE=3D2 FACE=3D"Arial">From sm-fs/btree/btree.c:</FONT>
</P>

<P><FONT FACE=3D"Times New Roman">Event<B> stack_use_local_overflow</B>: =
Local variable &quot;index&quot;: stack use of 1816 bytes exceeds =
maximum single use of 1024 bytes </FONT></P>

<P><FONT FACE=3D"Times New Roman">154<U> </U></FONT><U><FONT =
COLOR=3D"#0000FF" FACE=3D"Times New Roman">uint32 index</FONT></U><FONT =
FACE=3D"Times New Roman">[</FONT><U><FONT COLOR=3D"#0000FF" =
FACE=3D"Times New Roman">FS_BTREE_MAXKEYS</FONT></U><FONT FACE=3D"Times =
New Roman">]; </FONT>
</P>

<P><FONT SIZE=3D2 FACE=3D"Arial">I am pretty certain that =
FS_BTREE_MAXKEYS is greater than 1024 by design:</FONT>

<BR><FONT SIZE=3D2 FACE=3D"Arial">#define FS_BTREE_MAXKEYS \</FONT>

<BR><FONT SIZE=3D2 FACE=3D"Arial">&nbsp;&nbsp;&nbsp; ((PAGE_SIZE/(sizeof =
(fs_Extent) + sizeof (uint64) + sizeof (uint16))) - 1)</FONT>
</P>
<BR>

<P><FONT SIZE=3D2 FACE=3D"Arial">So, does anyone have a recommendation =
on what to do with this issue?</FONT>
</P>

<P><FONT SIZE=3D2 FACE=3D"Arial">Thanks.</FONT>
</P>

<P><FONT SIZE=3D2 FACE=3D"Arial">-Mike</FONT>
</P>

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