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authorNeilBrown <neilb@suse.com>2017-07-03 08:27:26 +0300
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2017-07-13 23:00:09 +0300
commit26fde4dfcbdcbbac394bb35de0c0f842de6972b5 (patch)
tree8e744314f14044538f8d65edc0c7bcd2a9750c3d /fs/nfs/inode.c
parenteaa2b82c3b3c938ab4635f8967d33f3e581da836 (diff)
downloadlinux-26fde4dfcbdcbbac394bb35de0c0f842de6972b5.tar.xz
NFS: check for nfs_refresh_inode() errors in nfs_fhget()
If an NFS server returns a filehandle that we have previously seen, and reports a different type, then nfs_refresh_inode() will log a warning and return an error. nfs_fhget() does not check for this error and may return an inode with a different type than the one that the server reported. This is likely to cause confusion, and is one way that ->open_context() could return a directory inode as discussed in the previous patch. So if nfs_refresh_inode() returns and error, return that error from nfs_fhget() to avoid the confusion propagating. Signed-off-by: NeilBrown <neilb@suse.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'fs/nfs/inode.c')
-rw-r--r--fs/nfs/inode.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 8c465d3c7e05..7e7a894601b9 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -525,8 +525,14 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, st
nfs_fscache_init_inode(inode);
unlock_new_inode(inode);
- } else
- nfs_refresh_inode(inode, fattr);
+ } else {
+ int err = nfs_refresh_inode(inode, fattr);
+ if (err < 0) {
+ iput(inode);
+ inode = ERR_PTR(err);
+ goto out_no_inode;
+ }
+ }
dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n",
inode->i_sb->s_id,
(unsigned long long)NFS_FILEID(inode),