PATCH: Uninitialized variable usage in contrib/pg_autovacuum

Started by Craig Bostonover 22 years ago4 messagesbugs
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#1Craig Boston
craig@qbrtr.gank.org

Sorry about the cross-post -- I'm not 100% sure which list this should be sent
to.

I noticed in the 7.4 release that in contrib/pg_autovacuum, args->logfile is
not initialized if a log file is not specified on the command line. This
causes an immediate segfault on systems that fill allocated memory with some
value other than zero (my FreeBSD machine uses 0xD0).

Several crashes later I discovered that args->user, password, host, and port
are also used without being initialized.

This doesn't appear to be fixed in CVS and I came up empty on a mailing list
search -- hope it hasn't been reported already.

Attached is a quick patch that fixes the problem.

--
Craig

Attachments:

autovacuum.uninit.patchtext/plain; charset=us-ascii; name=autovacuum.uninit.patchDownload+5-0
#2Bruce Momjian
bruce@momjian.us
In reply to: Craig Boston (#1)
Re: PATCH: Uninitialized variable usage in contrib/pg_autovacuum

Your patch has been added to the PostgreSQL unapplied patches list at:

http://momjian.postgresql.org/cgi-bin/pgpatches

I will try to apply it within the next 48 hours.

---------------------------------------------------------------------------

Craig Boston wrote:

Sorry about the cross-post -- I'm not 100% sure which list this should be sent
to.

I noticed in the 7.4 release that in contrib/pg_autovacuum, args->logfile is
not initialized if a log file is not specified on the command line. This
causes an immediate segfault on systems that fill allocated memory with some
value other than zero (my FreeBSD machine uses 0xD0).

Several crashes later I discovered that args->user, password, host, and port
are also used without being initialized.

This doesn't appear to be fixed in CVS and I came up empty on a mailing list
search -- hope it hasn't been reported already.

Attached is a quick patch that fixes the problem.

--
Craig

[ Attachment, skipping... ]

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  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073
#3Bruce Momjian
bruce@momjian.us
In reply to: Craig Boston (#1)
Re: PATCH: Uninitialized variable usage in contrib/pg_autovacuum

Patch applied. Thanks.

---------------------------------------------------------------------------

Craig Boston wrote:

Sorry about the cross-post -- I'm not 100% sure which list this should be sent
to.

I noticed in the 7.4 release that in contrib/pg_autovacuum, args->logfile is
not initialized if a log file is not specified on the command line. This
causes an immediate segfault on systems that fill allocated memory with some
value other than zero (my FreeBSD machine uses 0xD0).

Several crashes later I discovered that args->user, password, host, and port
are also used without being initialized.

This doesn't appear to be fixed in CVS and I came up empty on a mailing list
search -- hope it hasn't been reported already.

Attached is a quick patch that fixes the problem.

--
Craig

[ Attachment, skipping... ]

---------------------------(end of broadcast)---------------------------
TIP 2: you can get off all lists at once with the unregister command
(send "unregister YourEmailAddressHere" to majordomo@postgresql.org)

-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073
#4Bruce Momjian
bruce@momjian.us
In reply to: Craig Boston (#1)
Re: PATCH: Uninitialized variable usage in contrib/pg_autovacuum

Patch applied to 7.4.X too.

---------------------------------------------------------------------------

Craig Boston wrote:

Sorry about the cross-post -- I'm not 100% sure which list this should be sent
to.

I noticed in the 7.4 release that in contrib/pg_autovacuum, args->logfile is
not initialized if a log file is not specified on the command line. This
causes an immediate segfault on systems that fill allocated memory with some
value other than zero (my FreeBSD machine uses 0xD0).

Several crashes later I discovered that args->user, password, host, and port
are also used without being initialized.

This doesn't appear to be fixed in CVS and I came up empty on a mailing list
search -- hope it hasn't been reported already.

Attached is a quick patch that fixes the problem.

--
Craig

[ Attachment, skipping... ]

---------------------------(end of broadcast)---------------------------
TIP 2: you can get off all lists at once with the unregister command
(send "unregister YourEmailAddressHere" to majordomo@postgresql.org)

-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073