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

[OGAWA Hirofumi]

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..
-- 
OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
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