From: Al Viro <viro@ZenIV.linux.org.uk>
To: walt <w41ter@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: "Switch !O_CREAT case to use of do_last()" causes segfault in glibc
Date: Sat, 6 Mar 2010 18:32:54 +0000 [thread overview]
Message-ID: <20100306183254.GG30031@ZenIV.linux.org.uk> (raw)
In-Reply-To: <4B929CF9.8010506@gmail.com>
On Sat, Mar 06, 2010 at 10:20:41AM -0800, walt wrote:
> On 03/06/2010 10:03 AM, Al Viro wrote:
>
> >_Really_ interesting; it doesn't look like an oops - smells like an attempt
> >to do opendir() that fails for some reason, goes unnoticed and resulting
> >FILE * (i.e. NULL) is fed to readdir()?
> >
> >What does it attempt to open?
>
> Ah, this may help:
>
> open("/usr/share/zoneinfo/", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 47
> open("/usr/share/zoneinfo/MST7MDT", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 48
Now that is interesting. Looks like it has managed to lose O_DIRECTORY check
in the open without trailing slash and (properly) barfed with / added.
next prev parent reply other threads:[~2010-03-06 18:32 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-06 17:43 walt
2010-03-06 17:59 ` Al Viro
2010-03-06 18:03 ` Al Viro
2010-03-06 18:20 ` walt
2010-03-06 18:24 ` Al Viro
2010-03-06 18:32 ` Al Viro [this message]
2010-03-06 18:41 ` Al Viro
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