Re: [RFC v2 2/4] xfs: add verifier check for symlink with append/immutable flags

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

 



On Thu, May 10, 2018 at 04:13:57PM -0700, Luis R. Rodriguez wrote:
> The Linux VFS does not allow a way to set append/immuttable attributes
> to symlinks, this is just not possible. If this is detected we can
> correct this with xfs_repair, so inform the user.
> 
> Signed-off-by: Luis R. Rodriguez <mcgrof@xxxxxxxxxx>
> ---
>  fs/xfs/libxfs/xfs_symlink_remote.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/fs/xfs/libxfs/xfs_symlink_remote.c b/fs/xfs/libxfs/xfs_symlink_remote.c
> index 5ef5f354587e..42dd81ede3d6 100644
> --- a/fs/xfs/libxfs/xfs_symlink_remote.c
> +++ b/fs/xfs/libxfs/xfs_symlink_remote.c
> @@ -242,5 +242,10 @@ xfs_symlink_shortform_verify(
>  	/* We /did/ null-terminate the buffer, right? */
>  	if (*endp != 0)
>  		return __this_address;
> +
> +	/* Immutable and append flags are not allowed on symlinks */
> +	if (ip->i_d.di_flags & (XFS_DIFLAG_APPEND | XFS_DIFLAG_IMMUTABLE))
> +		return __this_address;

This belongs in xfs_dinode_verify so that it checks all symlinks, not
just the one shortform ones.

--D

> +
>  	return NULL;
>  }
> -- 
> 2.17.0
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-xfs" in
> the body of a message to majordomo@xxxxxxxxxxxxxxx
> More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Linux Ext4 Filesystem]     [Union Filesystem]     [Filesystem Testing]     [Ceph Users]     [Ecryptfs]     [AutoFS]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux Cachefs]     [Reiser Filesystem]     [Linux RAID]     [Samba]     [Device Mapper]     [CEPH Development]

  Powered by Linux