On 06/30/2015 10:36 AM, Dave Hansen wrote:
> From: Dave Hansen <dave.han...@linux.intel.com>
> 
> The comment here says that it is checking for invalid bits.  But,
> the mask is *actually* checking to ensure that _any_ valid bit
> is set, which is quite different.
> 
> Add the actual check which was intended.  Retain the existing
> check because it actually does something useful: ensure that some
> inotify bits are being added to the watch.  Plus, this is
> existing behavior which would be nice to preserve.
> 
> I did a quick sniff test that inotify functions and that my
> 'inotify-tools' package passes 'make check'.

Did anybody have any comments on this patch?  Who picks up inotify patches?

>  b/fs/notify/inotify/inotify_user.c |    3 +++
>  1 file changed, 3 insertions(+)
> 
> diff -puN fs/notify/inotify/inotify_user.c~inotify-EINVAL-on-invalid-bit 
> fs/notify/inotify/inotify_user.c
> --- a/fs/notify/inotify/inotify_user.c~inotify-EINVAL-on-invalid-bit  
> 2015-06-26 13:33:30.277219285 -0700
> +++ b/fs/notify/inotify/inotify_user.c        2015-06-26 13:35:19.026122033 
> -0700
> @@ -707,6 +707,9 @@ SYSCALL_DEFINE3(inotify_add_watch, int,
>       unsigned flags = 0;
>  
>       /* don't allow invalid bits: we don't want flags set */
> +     if (unlikely(mask & ~ALL_INOTIFY_BITS))
> +             return -EINVAL;
> +     /* require at least one valid bit set in the mask */
>       if (unlikely(!(mask & ALL_INOTIFY_BITS)))
>               return -EINVAL;
>  
> _
> 

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Reply via email to