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Date:      10 Apr 1998 13:41:18 +0200
From:      Andi Kleen <ak@muc.de>
To:        Wolfram Schneider <wosch@FreeBSD.ORG>
Cc:        cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG, cvs-sbin@FreeBSD.ORG, cvs-sys@FreeBSD.ORG
Subject:   Re: cvs commit: src/sbin/mount mntopts.h mount.8 mount.c src/sys/kern          vfs_lookup.c vfs_syscalls.c vfs_vnops.c src/sys/sys mount.h
Message-ID:  <k2emz5oqe9.fsf@zero.aec.at>
In-Reply-To: Wolfram Schneider's message of Wed, 8 Apr 1998 11:32:00 -0700 (PDT)
References:  <199804081832.LAA04184@freefall.freebsd.org>

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Wolfram Schneider <wosch@FreeBSD.ORG> writes:

> wosch       1998/04/08 11:32:00 PDT
> 
>   Modified files:
>     sbin/mount           mntopts.h mount.8 mount.c 
>     sys/kern             vfs_lookup.c vfs_syscalls.c vfs_vnops.c 
>     sys/sys              mount.h 
>   Log:
>   New mount option nosymfollow. If enabled, the kernel lookup()
>   function will not follow symbolic links on the mounted
>   file system and return EACCES (Permission denied).

Note that this is not enough alone to prevent /tmp races. A malicious
user can still use a named pipe to feed the victim changed data.


-Andi

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