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From: Richard Weinberger <richard@nod.at>
To: David Engraf <david.engraf@sysgo.com>
Cc: "linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>,
	David Oberhollenzer <goliath@sigma-star.at>
Subject: Re: [PATCH] mkfs.ubifs: Add support for symlinks in device table
Date: Thu, 18 May 2017 17:43:20 +0200	[thread overview]
Message-ID: <9e19f6f3-e825-72b4-cf5e-fea2c12a5c7e@nod.at> (raw)
In-Reply-To: <97e661e2-0648-e148-280b-8ff6cc9cbe09@nod.at>

Am 18.05.2017 um 17:27 schrieb Richard Weinberger:
> i.e.
> rw@captainhero:/mnt/dir> id
> uid=1000(rw) gid=100(users) groups=100(users)
> rw@captainhero:/mnt/dir> ls -la
> total 0
> drwxr-xr-x 2 rw   root 240 May 18 17:23 .
> drwxr-xr-x 3 root root 224 May 18 17:22 ..
> lrwxrwxrwx 1 root root  11 May 18 17:23 s -> /etc/shadow
> rw@captainhero:/mnt/dir> rm s
> rw@captainhero:/mnt/dir> ls -la
> total 0
> drwxr-xr-x 2 rw   root 176 May 18 17:24 .
> drwxr-xr-x 3 root root 224 May 18 17:22 ..
> rw@captainhero:/mnt/dir>
> 
> Although, user rw is not root, it can delete "s" which is owned by root
> because rw has write permission on /mnt/dir.

BTW: My example is misleading. Same applies to regular files.
Permissions and ownership of symlinks just don't apply.

Do you only care about the ls output or does one of your applications
depend on it?

Thanks,
//richard

  reply	other threads:[~2017-05-18 15:43 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-05-18 13:38 [PATCH] mkfs.ubifs: Add support for symlinks in device table David Engraf
2017-05-18 14:33 ` Richard Weinberger
2017-05-18 14:38   ` David Engraf
2017-05-18 14:47     ` Richard Weinberger
2017-05-18 15:03       ` David Engraf
2017-05-18 15:08         ` Richard Weinberger
2017-05-18 15:16           ` David Engraf
2017-05-18 15:27             ` Richard Weinberger
2017-05-18 15:43               ` Richard Weinberger [this message]
2017-05-19  6:13                 ` David Engraf
2017-05-19  8:24                   ` Richard Weinberger
2017-05-19  8:47                     ` David Engraf
2017-05-21 21:46                       ` Richard Weinberger
2017-05-23  6:52 ` [PATCH v2] " David Engraf
2017-05-31  9:04   ` David Oberhollenzer

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