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From: bangerth@dealii.org
To: gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org,
	jeronimo@mime.univ-paris8.fr, nobody@gcc.gnu.org
Subject: Re: c/9557: gcc  2.95.3 20010315 (SuSE) problem with place of variable
Date: Mon, 03 Feb 2003 23:42:00 -0000	[thread overview]
Message-ID: <20030203234238.27752.qmail@sources.redhat.com> (raw)

Synopsis: gcc  2.95.3 20010315 (SuSE) problem with place of variable

State-Changed-From-To: open->closed
State-Changed-By: bangerth
State-Changed-When: Mon Feb  3 23:42:38 2003
State-Changed-Why:
    User error -- read sscanf man page:
    -----------------------
      struct lien *con;
      short  port;
        
      con=(struct lien *)malloc(sizeof(struct lien));
      sscanf(n_service, "%d", &port);
      con->adr4.sin_port =1;
    --------------------------
    Using a short with %d is bound to write beyond its bounds.
    You overwrite the value of the con pointer, which afterwards
    points to no-go land. Use an integer with %d and your
    program works again. The fact that it worked by exchanging
    variable declarations just means that instead of the con
    pointer, you overwrote the ok flag.
    
    W.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=9557


             reply	other threads:[~2003-02-03 23:42 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-02-03 23:42 bangerth [this message]
  -- strict thread matches above, loose matches on Subject: below --
2003-02-03 23:16 jeronimo

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