linux-kernel - Re: [PATCH] ceph:Fix error handling in the function ceph_readddir

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Date:	Mon, 9 Nov 2015 18:20:16 +0800
From:	"Yan, Zheng" <zyan@...hat.com>
To:	Nicholas Krause <xerofoify@...il.com>
Cc:	sage@...hat.com, idryomov@...il.com, ceph-devel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ceph:Fix error handling in the function ceph_readddir_prepopulate


> On Nov 9, 2015, at 05:13, Nicholas Krause <xerofoify@...il.com> wrote:
> 
> This fixes error handling in the function ceph_readddir_prepopulate
> to properly check if the call to the function ceph_fill_dirfrag has
> failed by returning a error code. Further more if this does arise
> jump to the goto label, out of the function ceph_readdir_prepopulate
> in order to clean up previously allocated resources by this function
> before returning to the caller this errror code in order for all callers
> to be now aware and able to handle this failure in their own intended
> error paths.
> 
> Signed-off-by: Nicholas Krause <xerofoify@...il.com>
> ---
> fs/ceph/inode.c | 7 +++++--
> 1 file changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
> index 96d2bd8..7738be6 100644
> --- a/fs/ceph/inode.c
> +++ b/fs/ceph/inode.c
> @@ -1417,8 +1417,11 @@ int ceph_readdir_prepopulate(struct ceph_mds_request *req,
> 	} else {
> 		dout("readdir_prepopulate %d items under dn %p\n",
> 		     rinfo->dir_nr, parent);
> -		if (rinfo->dir_dir)
> -			ceph_fill_dirfrag(d_inode(parent), rinfo->dir_dir);
> +		if (rinfo->dir_dir) {
> +			err = ceph_fill_dirfrag(d_inode(parent), rinfo->dir_dir);
> +			if (err)
> +				goto out;
> +		}
> 	}
> 

ceph_fill_dirfrag() failure is not fatal. I think it’s better to not skip later code when it happens.

Regards
Yan, Zheng 


> 	if (ceph_frag_is_leftmost(frag) && req->r_readdir_offset == 2) {
> -- 
> 2.5.0
> 

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