[Libguestfs] [PATCH] common/mlutils: fix f_type comparisons

[Richard W.M. Jones]

On Wed, Oct 11, 2017 at 04:37:09PM +0200, Pino Toscano wrote:
> statfs::f_type is usually a signed type, so cast it to unsigned to check
> its value against magic values of filesystems.
> ---
>  common/mlutils/unix_utils-c.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/common/mlutils/unix_utils-c.c b/common/mlutils/unix_utils-c.c
> index f8c4f8abe..2afdc9e5f 100644
> --- a/common/mlutils/unix_utils-c.c
> +++ b/common/mlutils/unix_utils-c.c
> @@ -357,9 +357,9 @@ guestfs_int_mllib_statvfs_is_network_filesystem (value pathv)
>  #define SMB_SUPER_MAGIC 0x517b
>  #endif
>  
> -  return Val_bool (buf.f_type == CIFS_MAGIC_NUMBER ||
> -                   buf.f_type == NFS_SUPER_MAGIC ||
> -                   buf.f_type == SMB_SUPER_MAGIC);
> +  return Val_bool ((unsigned int) buf.f_type == CIFS_MAGIC_NUMBER ||
> +                   (unsigned int) buf.f_type == NFS_SUPER_MAGIC ||
> +                   (unsigned int) buf.f_type == SMB_SUPER_MAGIC);
>  #else
>    return Val_bool (0);
>  #endif

ACK.  Can you add the commit hash that this fixes to the commit message.

Rich.

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