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nfs3_list_one_acl(): check get_acl() result with IS_ERR_OR_NULL 

commit 7a9e75a185 upstream.

There was a check for result being not NULL. But get_acl() may return
NULL, or ERR_PTR, or actual pointer.
The purpose of the function where current change is done is to "list
ACLs only when they are available", so any error condition of get_acl()
mustn't be elevated, and returning 0 there is still valid.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=81111
Signed-off-by: Andrey Utkin <andrey.krieger.utkin@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Fixes: 74adf83f5d (nfs: only show Posix ACLs in listxattr if actually...)
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andrey Utkin 2014-07-26 14:58:01 +03:00 committed by Greg Kroah-Hartman
parent d29135ddc8
commit 78359f18aa
1 changed files with 1 additions and 1 deletions
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2
fs/nfs/nfs3acl.c
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@ -256,7 +256,7 @@ nfs3_list_one_acl(struct inode *inode, int type, const char *name, void *data,
char *p = data + *result;
acl = get_acl(inode, type);
if (!acl)
if (IS_ERR_OR_NULL(acl))
return 0;
posix_acl_release(acl);