On Thu, Jan 1, 2015 at 4:13 PM, Richard Weinberger
<richard.weinberger@xxxxxxxxx> wrote:
> On Thu, Jan 1, 2015 at 6:07 AM, Seunghun Lee <waydi1@xxxxxxxxx> wrote:
>> Overlayfs should be mounted read-only when upper fs is r/o or nonexistend.
>> But now it can be remounted read-write and this can causes kernel panic.
>> So we should prevent read-write remount when the above situation.
>>
>> Signed-off-by: Seunghun Lee <waydi1@xxxxxxxxx>
>
> This patch makes zero sense, did you use the wrong diff?
>
Hmm, was also my 1st thoughts when I saw squashfs_remount() in overlayfs code.
- Sedat -
>> ---
>> fs/overlayfs/super.c | 8 ++++++++
>> 1 file changed, 8 insertions(+)
>>
>> diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
>> index 84f3144..1faa5e5 100644
>> --- a/fs/overlayfs/super.c
>> +++ b/fs/overlayfs/super.c
>> @@ -522,6 +522,14 @@ static int ovl_show_options(struct seq_file *m, struct dentry *dentry)
>> return 0;
>> }
>>
>> +static int squashfs_remount(struct super_block *sb, int *flags, char *data)
>> +{
>> + if (!ufs->upper_mnt || (ufs->upper_mnt->mnt_sb->s_flags & MS_RDONLY))
>> + *flags |= MS_RDONLY;
>> +
>> + return 0;
>> +}
>> +
>> static const struct super_operations ovl_super_operations = {
>> .put_super = ovl_put_super,
>> .statfs = ovl_statfs,
>> --
>> 2.1.3
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
>> the body of a message to majordomo@xxxxxxxxxxxxxxx
>> More majordomo info at http://vger.kernel.org/majordomo-info.html
>> Please read the FAQ at http://www.tux.org/lkml/
>
>
>
> --
> Thanks,
> //richard
> --
> To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in
> the body of a message to majordomo@xxxxxxxxxxxxxxx
> More majordomo info at http://vger.kernel.org/majordomo-info.html
--
To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
