Jan Engelhardt <[email protected]> writes:
> On Apr 21 2007 08:10, Eric W. Biederman wrote:
>>>
>>>> Define a new fs flag FS_SAFE, which denotes, that unprivileged
>>>> mounting of this filesystem may not constitute a security problem.
>>>>
>>>> Since most filesystems haven't been designed with unprivileged
>>>> mounting in mind, a thorough audit is needed before setting this flag.
>>>
>>> Practically speaking, is there any realistic likelihood that any filesystem
>>> apart from FUSE will ever use this?
>>
>>Also potentially some of the kernel virtual filesystems. /proc should
>>be safe already. If you don't have any kind of backing store this problem
>>gets easier.
>
> tmpfs!
tmpfs is a possible problem because it can consume lots of ram/swap. Which
is why it has limits on the amount of space it can consume. Those are set as
mount options as I recall. Which means that we would need to do something
different with respect to limits before tmpfs could become safe for
an untrusted user to mount.
Still it's close.
Eric
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
