Re: Rsync cannot copy to a vfat partition on kernel 2.6.25

[Pavel Machek]

On Mon 2008-06-02 06:12:23, OGAWA Hirofumi wrote:
> Pavel Machek <pavel@xxxxxx> writes:
> 
> > Hi!
> 
> Hi,
> 
> >> > We had a user report at https://bugzilla.redhat.com/show_bug.cgi?id=449080
> >> > that in 2.6.25, he can no longer rsync to a vfat partition, even as root.
> >> > I just reproduced this here. It gets -EPERM in the mkstemp call.
> >> > (full strace in the bug report).
> >> >
> >> > Did we change behaviour somehow in the vfat code?
> >> > 2.6.24.7 works fine apparently.
> >> 
> >> Yes, it was changed. New one allows only acceptable chmod(), and if not
> >> acceptable, it returns -EPERM. Old one allows even if it can't store the
> >> disk inode. But it may be too strict for users.
> >
> > Hmm... but I guess mkstemp is no longer safe with this?
> >
> > So we have choice between security hole and regression...?
> 
> Maybe. But if users choose the group or world writable umask, I guess
> nobody would care the permission of temporary file, because all file is
> writable always. Um..

Okay, if the user wants his vfat world-readable, it is hard to create
security hole there.
								Pavel
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