Re: [PATCH] ext2: ensure link targets are NULL-terminated

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Thu, Dec 11, 2008 at 07:16:28PM +0000, Duane Griffin wrote:
> Ensure link targets are NULL-terminated, even if corrupted on-disk.

FWIW, that's spelled 'NUL' -- NULL is a pointer value, NUL is an ASCII
code.

> Signed-off-by: Duane Griffin <duaneg@xxxxxxxxx>
> ---
>  fs/ext2/symlink.c |    4 +++-
>  1 files changed, 3 insertions(+), 1 deletions(-)
> 
> diff --git a/fs/ext2/symlink.c b/fs/ext2/symlink.c
> index 4e2426e..9b164ba 100644
> --- a/fs/ext2/symlink.c
> +++ b/fs/ext2/symlink.c
> @@ -24,7 +24,9 @@
>  static void *ext2_follow_link(struct dentry *dentry, struct nameidata *nd)
>  {
>  	struct ext2_inode_info *ei = EXT2_I(dentry->d_inode);
> -	nd_set_link(nd, (char *)ei->i_data);
> +	char *link = (char *) ei->i_data;
> +	link[sizeof(ei->i_data) - 1] = '\0';
> +	nd_set_link(nd, link);
>  	return NULL;
>  }
>  
> -- 
> 1.6.0.4
> 
> --
> 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

-- 
Matthew Wilcox				Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours.  We can't possibly take such
a retrograde step."
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html

[Index of Archives]     [Reiser Filesystem Development]     [Ceph FS]     [Kernel Newbies]     [Security]     [Netfilter]     [Bugtraq]     [Linux FS]     [Yosemite National Park]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Samba]     [Device Mapper]     [Linux Media]

  Powered by Linux