Thread

1. Grant/Revoke problems

   James Hughes <jamesh@interpath.com> — 1998-01-24T06:55:47Z

   I have been chasing the grant/revoke problems (on Linux platforms) and
   have had some success. There were two problems causing SIGSEGV's to
   crash the backend. 
   
   The first problem was caused by a function trying to pass a string
   directly. This was fixed by returning the result of a strdup().
   
   The second problem is in ./src/backend/parser/gram.y . The grant and
   revoke statements are the only ones to use "free()". Somehow this is
   causing SIGSEGV's and crashing the backend. I removed these from the
   source and re-built everything: and it works now. But! I know absolutely
   nothing about yacc/bison and do not know the implications of removing
   these statements from the source. 
   
   If everyone thinks it is OK, I will submit patches. If someone can look
   at the grant and revoke code in gram.y, I will submit the patches for
   ./src/backend/utils/init/miscinit.c.
   
   
   -James
   
    
   
   
   

2. Re: [HACKERS] Grant/Revoke problems

   Bruce Momjian <maillist@candle.pha.pa.us> — 1998-01-24T19:39:11Z

   > 
   > 
   > I have been chasing the grant/revoke problems (on Linux platforms) and
   > have had some success. There were two problems causing SIGSEGV's to
   > crash the backend. 
   > 
   > The first problem was caused by a function trying to pass a string
   > directly. This was fixed by returning the result of a strdup().
   > 
   > The second problem is in ./src/backend/parser/gram.y . The grant and
   > revoke statements are the only ones to use "free()". Somehow this is
   > causing SIGSEGV's and crashing the backend. I removed these from the
   > source and re-built everything: and it works now. But! I know absolutely
   > nothing about yacc/bison and do not know the implications of removing
   > these statements from the source. 
   > 
   > If everyone thinks it is OK, I will submit patches. If someone can look
   > at the grant and revoke code in gram.y, I will submit the patches for
   > ./src/backend/utils/init/miscinit.c.
   
   The free() in gram.y is clearly wrong.  Please submit a patch.  I have
   fixed some of these in 6.3, but not that one.
   
   -- 
   Bruce Momjian
   maillist@candle.pha.pa.us