On Mon, 2013-10-07 at 19:19 -0300, Geyslan G. Bem wrote:
> Changes the sign type to unsigned, avoiding the possibility of
> wrap when ORing the p9 or unix bit modes.
[]
> diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
[]
> @@ -144,7 +144,7 @@ static umode_t p9mode2unixmode(struct v9fs_session_info 
> *v9ses,
>       else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses))
>                && (v9ses->nodev == 0)) {
>               char type = 0, ext[32];
> -             int major = -1, minor = -1;
> +             u32 major = 0, minor = 0;
>  
>               strlcpy(ext, stat->extension, sizeof(ext));
>               sscanf(ext, "%c %u %u", &type, &major, &minor);

This bit changes the MKDEV below it.

I would think that the sscanf return should be
checked for 3 and maybe MKDEV should not be
constructed when it's not.


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