From: Han Pingtian <hanpt@linux.vnet.ibm.com>
To: zsh-workers@zsh.org
Subject: Re: zsh 5.0.5-dev-2
Date: Mon, 18 Aug 2014 22:02:29 +0800 [thread overview]
Message-ID: <20140818140229.GB4198@localhost.localdomain> (raw)
In-Reply-To: <140817233619.ZM25264@torch.brasslantern.com>
On Sun, Aug 17, 2014 at 11:36:19PM -0700, Bart Schaefer wrote:
> On Aug 18, 10:56am, Han Pingtian wrote:
> } Subject: Re: zsh 5.0.5-dev-2
> }
> } On Sun, Aug 17, 2014 at 10:30:30AM -0700, Bart Schaefer wrote:
> } >
> } > I suspect Fortify is reporting a potential error rather than a real
> } > one, because we'd presumably have seen other problems before this if
> } > "cd .." actually caused an 8kb buffer on the stack to overflow.
> }
> } I have tried to print the length of xbuf and *pp before the sprintf().
> } Looks like when overflow being triggered, the length of xbuf is 8188,
> } and the length of *pp is 10.
>
> I now suspect you've deliberately constructed and (with chaselinks not
> set?) cd'd one level down at a time into a path that's at least 8188
> characters long, and then setopt chaselinks and done "cd .." from the
> bottom directory in that path. Is that correct?
>
Sorry for the confusing. I found this problem with this command which
comes from 32274:
% for i in `seq 1000`; do mkdir 0123456789; cd 0123456789; done; cd ..
And the filesystem is tmpfs. I don't set chaselinks, but looks like it
will be set within cd_try_chdir():
1119 if (!chasinglinks)
1120 dochaselinks = fixdir(buf);
... ...
1134 if (dochaselinks)
1135 chasinglinks = 1;
then xsymlink() will be called.
next prev parent reply other threads:[~2014-08-18 14:13 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-12 20:29 Peter Stephenson
2014-08-12 22:36 ` Axel Beckert
2014-08-13 14:04 ` zsh 5.0.5-dev-2 / Occassional hangs on Test/A05execution.ztst Axel Beckert
2014-08-13 19:08 ` Bart Schaefer
2014-08-14 8:48 ` Axel Beckert
2014-08-14 8:50 ` Peter Stephenson
2014-08-14 16:25 ` Bart Schaefer
2014-08-14 16:31 ` Axel Beckert
2014-08-14 17:34 ` Axel Beckert
2014-08-15 4:50 ` Bart Schaefer
2014-08-15 9:32 ` Axel Beckert
2014-08-15 17:33 ` Bart Schaefer
2014-08-15 19:42 ` Axel Beckert
2014-08-16 18:12 ` zsh 5.0.5/6 Peter Stephenson
2014-08-13 17:28 ` zsh 5.0.5-dev-2 Dominic Hopf
2014-08-13 22:34 ` Oliver Kiddle
2014-08-14 8:34 ` Peter Stephenson
2014-08-14 9:32 ` Peter Stephenson
2014-08-14 16:20 ` Bart Schaefer
2014-08-14 19:54 ` Peter Stephenson
2014-08-15 4:44 ` Bart Schaefer
2014-08-15 8:38 ` Peter Stephenson
2014-08-15 11:23 ` Han Pingtian
2014-08-15 17:17 ` Bart Schaefer
2014-08-16 0:35 ` Han Pingtian
2014-08-17 17:30 ` Bart Schaefer
2014-08-18 2:56 ` Han Pingtian
2014-08-18 6:36 ` Bart Schaefer
2014-08-18 14:02 ` Han Pingtian [this message]
2014-08-23 17:51 ` Symlink chasing Peter Stephenson
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