Re: Phantom ACL-related xattrs on 3.14.4 NFS client

From: Christoph Hellwig
Date: Wed Jun 11 2014 - 12:22:45 EST


On Wed, Jun 11, 2014 at 09:15:18AM -0700, Philippe Troin wrote:
> So, the only regression remaining between 3.13.11 and 3.14.6 + your
> patch is the one where listxattr(2) and friends do not NUL-terminate the
> xattr names they return. This is detailed in
> <1402435203.24047.9.camel@xxxxxxxxxxxxxxxxxxxxx> I sent yesterday.

Oh, that's a bug in my patch. The following incremental patch should
fix it:

diff --git a/fs/nfs/nfs3acl.c b/fs/nfs/nfs3acl.c
index e083827..8f854dd 100644
--- a/fs/nfs/nfs3acl.c
+++ b/fs/nfs/nfs3acl.c
@@ -262,6 +262,7 @@ nfs3_list_one_acl(struct inode *inode, int type, const char *name, void *data,
posix_acl_release(acl);

*result += strlen(name);
+ *result += 1;
if (!size)
return 0;
if (*result > size)
--
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